			// Copyright 2005, Google Inc.
			// All rights reserved.
			//
			// Redistribution and use in source and binary forms, with or without
			// modification, are permitted provided that the following conditions are
			// met:
			//
			// * Redistributions of source code must retain the above copyright
			// notice, this list of conditions and the following disclaimer.
			// * Redistributions in binary form must reproduce the above
			// copyright notice, this list of conditions and the following disclaimer
			// in the documentation and/or other materials provided with the
			// distribution.
			// * Neither the name of Google Inc. nor the names of its
			// contributors may be used to endorse or promote products derived from
			// this software without specific prior written permission.
			//
			// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
			// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
			// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
			// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
			// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
			// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
			// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
			// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
			// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
			// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
			// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
			//
			// Author: wan@google.com (Zhanyong Wan)
			//
			// The Google C++ Testing Framework (Google Test)

			#include "gtest/gtest.h"
			#include "gtest/internal/custom/gtest.h"
			#include "gtest/gtest-spi.h"

			#include <ctype.h>
			#include <math.h>
			#include <stdarg.h>
			#include <stdio.h>
			#include <stdlib.h>
			#include <time.h>
			#include <wchar.h>
			#include <wctype.h>

			#include <algorithm>
			#include <iomanip>
			#include <limits>
			#include <list>
			#include <map>
			#include <ostream> // NOLINT
			#include <sstream>
			#include <vector>

			#if GTEST_OS_LINUX

			// TODO(kenton@google.com): Use autoconf to detect availability of
			// gettimeofday().
			# define GTEST_HAS_GETTIMEOFDAY_ 1

			# include <fcntl.h> // NOLINT
			# include <limits.h> // NOLINT
			# include <sched.h> // NOLINT
			// Declares vsnprintf(). This header is not available on Windows.
			# include <strings.h> // NOLINT
			# include <sys/mman.h> // NOLINT
			# include <sys/time.h> // NOLINT
			# include <unistd.h> // NOLINT
			# include <string>

			#elif GTEST_OS_SYMBIAN
			# define GTEST_HAS_GETTIMEOFDAY_ 1
			# include <sys/time.h> // NOLINT

			#elif GTEST_OS_ZOS
			# define GTEST_HAS_GETTIMEOFDAY_ 1
			# include <sys/time.h> // NOLINT

			// On z/OS we additionally need strings.h for strcasecmp.
			# include <strings.h> // NOLINT

			#elif GTEST_OS_WINDOWS_MOBILE // We are on Windows CE.

			# include <windows.h> // NOLINT
			# undef min

			#elif GTEST_OS_WINDOWS // We are on Windows proper.

			# include <io.h> // NOLINT
			# include <sys/timeb.h> // NOLINT
			# include <sys/types.h> // NOLINT
			# include <sys/stat.h> // NOLINT

			# if GTEST_OS_WINDOWS_MINGW
			// MinGW has gettimeofday() but not _ftime64().
			// TODO(kenton@google.com): Use autoconf to detect availability of
			// gettimeofday().
			// TODO(kenton@google.com): There are other ways to get the time on
			// Windows, like GetTickCount() or GetSystemTimeAsFileTime(). MinGW
			// supports these. consider using them instead.
			# define GTEST_HAS_GETTIMEOFDAY_ 1
			# include <sys/time.h> // NOLINT
			# endif // GTEST_OS_WINDOWS_MINGW

			// cpplint thinks that the header is already included, so we want to
			// silence it.
			# include <windows.h> // NOLINT
			# undef min

			#else

			// Assume other platforms have gettimeofday().
			// TODO(kenton@google.com): Use autoconf to detect availability of
			// gettimeofday().
			# define GTEST_HAS_GETTIMEOFDAY_ 1

			// cpplint thinks that the header is already included, so we want to
			// silence it.
			# include <sys/time.h> // NOLINT
			# include <unistd.h> // NOLINT

			#endif // GTEST_OS_LINUX

			#if GTEST_HAS_EXCEPTIONS
			# include <stdexcept>
			#endif

			#if GTEST_CAN_STREAM_RESULTS_
			# include <arpa/inet.h> // NOLINT
			# include <netdb.h> // NOLINT
			# include <sys/socket.h> // NOLINT
			# include <sys/types.h> // NOLINT
			#endif

			// Indicates that this translation unit is part of Google Test's
			// implementation. It must come before gtest-internal-inl.h is
			// included, or there will be a compiler error. This trick is to
			// prevent a user from accidentally including gtest-internal-inl.h in
			// their code.
			#define GTEST_IMPLEMENTATION_ 1
			#include "src/gtest-internal-inl.h"
			#undef GTEST_IMPLEMENTATION_

			#if GTEST_OS_WINDOWS
			# define vsnprintf _vsnprintf
			#endif // GTEST_OS_WINDOWS

			namespace testing {

			using internal::CountIf;
			using internal::ForEach;
			using internal::GetElementOr;
			using internal::Shuffle;

			// Constants.

			// A test whose test case name or test name matches this filter is
			// disabled and not run.
			static const char kDisableTestFilter[] = "DISABLED_:/DISABLED_*";

			// A test case whose name matches this filter is considered a death
			// test case and will be run before test cases whose name doesn't
			// match this filter.
			static const char kDeathTestCaseFilter[] = "DeathTest:DeathTest/*";

			// A test filter that matches everything.
			static const char kUniversalFilter[] = "*";

			// The default output file for XML output.
			static const char kDefaultOutputFile[] = "test_detail.xml";

			// The environment variable name for the test shard index.
			static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
			// The environment variable name for the total number of test shards.
			static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
			// The environment variable name for the test shard status file.
			static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";

			namespace internal {

			// The text used in failure messages to indicate the start of the
			// stack trace.
			const char kStackTraceMarker[] = "\nStack trace:\n";

			// g_help_flag is true iff the --help flag or an equivalent form is
			// specified on the command line.
			bool g_help_flag = false;

			} // namespace internal

			static const char* GetDefaultFilter() {
			#ifdef GTEST_TEST_FILTER_ENV_VAR_
			const char* const testbridge_test_only = getenv(GTEST_TEST_FILTER_ENV_VAR_);
			if (testbridge_test_only != NULL) {
			return testbridge_test_only;
			}
			#endif // GTEST_TEST_FILTER_ENV_VAR_
			return kUniversalFilter;
			}

			GTEST_DEFINE_bool_(
			also_run_disabled_tests,
			internal::BoolFromGTestEnv("also_run_disabled_tests", false),
			"Run disabled tests too, in addition to the tests normally being run.");

			GTEST_DEFINE_bool_(
			break_on_failure,
			internal::BoolFromGTestEnv("break_on_failure", false),
			"True iff a failed assertion should be a debugger break-point.");

			GTEST_DEFINE_bool_(
			catch_exceptions,
			internal::BoolFromGTestEnv("catch_exceptions", true),
			"True iff " GTEST_NAME_
			" should catch exceptions and treat them as test failures.");

			GTEST_DEFINE_string_(
			color,
			internal::StringFromGTestEnv("color", "auto"),
			"Whether to use colors in the output. Valid values: yes, no, "
			"and auto. 'auto' means to use colors if the output is "
			"being sent to a terminal and the TERM environment variable "
			"is set to a terminal type that supports colors.");

			GTEST_DEFINE_string_(
			filter,
			internal::StringFromGTestEnv("filter", GetDefaultFilter()),
			"A colon-separated list of glob (not regex) patterns "
			"for filtering the tests to run, optionally followed by a "
			"'-' and a : separated list of negative patterns (tests to "
			"exclude). A test is run if it matches one of the positive "
			"patterns and does not match any of the negative patterns.");

			GTEST_DEFINE_bool_(list_tests, false,
			"List all tests without running them.");

			GTEST_DEFINE_string_(
			output,
			internal::StringFromGTestEnv("output", ""),
			"A format (currently must be \"xml\"), optionally followed "
			"by a colon and an output file name or directory. A directory "
			"is indicated by a trailing pathname separator. "
			"Examples: \"xml:filename.xml\", \"xml::directoryname/\". "
			"If a directory is specified, output files will be created "
			"within that directory, with file-names based on the test "
			"executable's name and, if necessary, made unique by adding "
			"digits.");

			GTEST_DEFINE_bool_(
			print_time,
			internal::BoolFromGTestEnv("print_time", true),
			"True iff " GTEST_NAME_
			" should display elapsed time in text output.");

			GTEST_DEFINE_int32_(
			random_seed,
			internal::Int32FromGTestEnv("random_seed", 0),
			"Random number seed to use when shuffling test orders. Must be in range "
			"[1, 99999], or 0 to use a seed based on the current time.");

			GTEST_DEFINE_int32_(
			repeat,
			internal::Int32FromGTestEnv("repeat", 1),
			"How many times to repeat each test. Specify a negative number "
			"for repeating forever. Useful for shaking out flaky tests.");

			GTEST_DEFINE_bool_(
			show_internal_stack_frames, false,
			"True iff " GTEST_NAME_ " should include internal stack frames when "
			"printing test failure stack traces.");

			GTEST_DEFINE_bool_(
			shuffle,
			internal::BoolFromGTestEnv("shuffle", false),
			"True iff " GTEST_NAME_
			" should randomize tests' order on every run.");

			GTEST_DEFINE_int32_(
			stack_trace_depth,
			internal::Int32FromGTestEnv("stack_trace_depth", kMaxStackTraceDepth),
			"The maximum number of stack frames to print when an "
			"assertion fails. The valid range is 0 through 100, inclusive.");

			GTEST_DEFINE_string_(
			stream_result_to,
			internal::StringFromGTestEnv("stream_result_to", ""),
			"This flag specifies the host name and the port number on which to stream "
			"test results. Example: \"localhost:555\". The flag is effective only on "
			"Linux.");

			GTEST_DEFINE_bool_(
			throw_on_failure,
			internal::BoolFromGTestEnv("throw_on_failure", false),
			"When this flag is specified, a failed assertion will throw an exception "
			"if exceptions are enabled or exit the program with a non-zero code "
			"otherwise.");

			#if GTEST_USE_OWN_FLAGFILE_FLAG_
			GTEST_DEFINE_string_(
			flagfile,
			internal::StringFromGTestEnv("flagfile", ""),
			"This flag specifies the flagfile to read command-line flags from.");
			#endif // GTEST_USE_OWN_FLAGFILE_FLAG_

			namespace internal {

			// Generates a random number from [0, range), using a Linear
			// Congruential Generator (LCG). Crashes if 'range' is 0 or greater
			// than kMaxRange.
			UInt32 Random::Generate(UInt32 range) {
			// These constants are the same as are used in glibc's rand(3).
			// Use wider types than necessary to prevent unsigned overflow diagnostics.
			state_ = static_cast<UInt32>(1103515245ULL*state_ + 12345U) % kMaxRange;

			GTEST_CHECK_(range > 0)
			<< "Cannot generate a number in the range [0, 0).";
			GTEST_CHECK_(range <= kMaxRange)
			<< "Generation of a number in [0, " << range << ") was requested, "
			<< "but this can only generate numbers in [0, " << kMaxRange << ").";

			// Converting via modulus introduces a bit of downward bias, but
			// it's simple, and a linear congruential generator isn't too good
			// to begin with.
			return state_ % range;
			}

			// GTestIsInitialized() returns true iff the user has initialized
			// Google Test. Useful for catching the user mistake of not initializing
			// Google Test before calling RUN_ALL_TESTS().
			static bool GTestIsInitialized() { return GetArgvs().size() > 0; }

			// Iterates over a vector of TestCases, keeping a running sum of the
			// results of calling a given int-returning method on each.
			// Returns the sum.
			static int SumOverTestCaseList(const std::vector<TestCase*>& case_list,
			int (TestCase::*method)() const) {
			int sum = 0;
			for (size_t i = 0; i < case_list.size(); i++) {
			sum += (case_list[i]->*method)();
			}
			return sum;
			}

			// Returns true iff the test case passed.
			static bool TestCasePassed(const TestCase* test_case) {
			return test_case->should_run() && test_case->Passed();
			}

			// Returns true iff the test case failed.
			static bool TestCaseFailed(const TestCase* test_case) {
			return test_case->should_run() && test_case->Failed();
			}

			// Returns true iff test_case contains at least one test that should
			// run.
			static bool ShouldRunTestCase(const TestCase* test_case) {
			return test_case->should_run();
			}

			// AssertHelper constructor.
			AssertHelper::AssertHelper(TestPartResult::Type type,
			const char* file,
			int line,
			const char* message)
			: data_(new AssertHelperData(type, file, line, message)) {
			}

			AssertHelper::~AssertHelper() {
			delete data_;
			}

			// Message assignment, for assertion streaming support.
			void AssertHelper::operator=(const Message& message) const {
			UnitTest::GetInstance()->
			AddTestPartResult(data_->type, data_->file, data_->line,
			AppendUserMessage(data_->message, message),
			UnitTest::GetInstance()->impl()
			->CurrentOsStackTraceExceptTop(1)
			// Skips the stack frame for this function itself.
			); // NOLINT
			}

			// Mutex for linked pointers.
			GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_linked_ptr_mutex);

			// A copy of all command line arguments. Set by InitGoogleTest().
			::std::vector<testing::internal::string> g_argvs;

			const ::std::vector<testing::internal::string>& GetArgvs() {
			#if defined(GTEST_CUSTOM_GET_ARGVS_)
			return GTEST_CUSTOM_GET_ARGVS_();
			#else // defined(GTEST_CUSTOM_GET_ARGVS_)
			return g_argvs;
			#endif // defined(GTEST_CUSTOM_GET_ARGVS_)
			}

			// Returns the current application's name, removing directory path if that
			// is present.
			FilePath GetCurrentExecutableName() {
			FilePath result;

			#if GTEST_OS_WINDOWS
			result.Set(FilePath(GetArgvs()[0]).RemoveExtension("exe"));
			#else
			result.Set(FilePath(GetArgvs()[0]));
			#endif // GTEST_OS_WINDOWS

			return result.RemoveDirectoryName();
			}

			// Functions for processing the gtest_output flag.

			// Returns the output format, or "" for normal printed output.
			std::string UnitTestOptions::GetOutputFormat() {
			const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
			if (gtest_output_flag == NULL) return std::string("");

			const char* const colon = strchr(gtest_output_flag, ':');
			return (colon == NULL) ?
			std::string(gtest_output_flag) :
			std::string(gtest_output_flag, colon - gtest_output_flag);
			}

			// Returns the name of the requested output file, or the default if none
			// was explicitly specified.
			std::string UnitTestOptions::GetAbsolutePathToOutputFile() {
			const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
			if (gtest_output_flag == NULL)
			return "";

			const char* const colon = strchr(gtest_output_flag, ':');
			if (colon == NULL)
			return internal::FilePath::ConcatPaths(
			internal::FilePath(
			UnitTest::GetInstance()->original_working_dir()),
			internal::FilePath(kDefaultOutputFile)).string();

			internal::FilePath output_name(colon + 1);
			if (!output_name.IsAbsolutePath())
			// TODO(wan@google.com): on Windows \some\path is not an absolute
			// path (as its meaning depends on the current drive), yet the
			// following logic for turning it into an absolute path is wrong.
			// Fix it.
			output_name = internal::FilePath::ConcatPaths(
			internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
			internal::FilePath(colon + 1));

			if (!output_name.IsDirectory())
			return output_name.string();

			internal::FilePath result(internal::FilePath::GenerateUniqueFileName(
			output_name, internal::GetCurrentExecutableName(),
			GetOutputFormat().c_str()));
			return result.string();
			}

			// Returns true iff the wildcard pattern matches the string. The
			// first ':' or '\0' character in pattern marks the end of it.
			//
			// This recursive algorithm isn't very efficient, but is clear and
			// works well enough for matching test names, which are short.
			bool UnitTestOptions::PatternMatchesString(const char *pattern,
			const char *str) {
			switch (*pattern) {
			case '\0':
			case ':': // Either ':' or '\0' marks the end of the pattern.
			return *str == '\0';
			case '?': // Matches any single character.
			return *str != '\0' && PatternMatchesString(pattern + 1, str + 1);
			case '*': // Matches any string (possibly empty) of characters.
			return (*str != '\0' && PatternMatchesString(pattern, str + 1)) \|\|
			PatternMatchesString(pattern + 1, str);
			default: // Non-special character. Matches itself.
			return pattern == str &&
			PatternMatchesString(pattern + 1, str + 1);
			}
			}

			bool UnitTestOptions::MatchesFilter(
			const std::string& name, const char* filter) {
			const char *cur_pattern = filter;
			for (;;) {
			if (PatternMatchesString(cur_pattern, name.c_str())) {
			return true;
			}

			// Finds the next pattern in the filter.
			cur_pattern = strchr(cur_pattern, ':');

			// Returns if no more pattern can be found.
			if (cur_pattern == NULL) {
			return false;
			}

			// Skips the pattern separater (the ':' character).
			cur_pattern++;
			}
			}

			// Returns true iff the user-specified filter matches the test case
			// name and the test name.
			bool UnitTestOptions::FilterMatchesTest(const std::string &test_case_name,
			const std::string &test_name) {
			const std::string& full_name = test_case_name + "." + test_name.c_str();

			// Split --gtest_filter at '-', if there is one, to separate into
			// positive filter and negative filter portions
			const char* const p = GTEST_FLAG(filter).c_str();
			const char* const dash = strchr(p, '-');
			std::string positive;
			std::string negative;
			if (dash == NULL) {
			positive = GTEST_FLAG(filter).c_str(); // Whole string is a positive filter
			negative = "";
			} else {
			positive = std::string(p, dash); // Everything up to the dash
			negative = std::string(dash + 1); // Everything after the dash
			if (positive.empty()) {
			// Treat '-test1' as the same as '*-test1'
			positive = kUniversalFilter;
			}
			}

			// A filter is a colon-separated list of patterns. It matches a
			// test if any pattern in it matches the test.
			return (MatchesFilter(full_name, positive.c_str()) &&
			!MatchesFilter(full_name, negative.c_str()));
			}

			#if GTEST_HAS_SEH
			// Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
			// given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
			// This function is useful as an __except condition.
			int UnitTestOptions::GTestShouldProcessSEH(DWORD exception_code) {
			// Google Test should handle a SEH exception if:
			// 1. the user wants it to, AND
			// 2. this is not a breakpoint exception, AND
			// 3. this is not a C++ exception (VC++ implements them via SEH,
			// apparently).
			//
			// SEH exception code for C++ exceptions.
			// (see http://support.microsoft.com/kb/185294 for more information).
			const DWORD kCxxExceptionCode = 0xe06d7363;

			bool should_handle = true;

			if (!GTEST_FLAG(catch_exceptions))
			should_handle = false;
			else if (exception_code == EXCEPTION_BREAKPOINT)
			should_handle = false;
			else if (exception_code == kCxxExceptionCode)
			should_handle = false;

			return should_handle ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
			}
			#endif // GTEST_HAS_SEH

			} // namespace internal

			// The c'tor sets this object as the test part result reporter used by
			// Google Test. The 'result' parameter specifies where to report the
			// results. Intercepts only failures from the current thread.
			ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
			TestPartResultArray* result)
			: intercept_mode_(INTERCEPT_ONLY_CURRENT_THREAD),
			result_(result) {
			Init();
			}

			// The c'tor sets this object as the test part result reporter used by
			// Google Test. The 'result' parameter specifies where to report the
			// results.
			ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
			InterceptMode intercept_mode, TestPartResultArray* result)
			: intercept_mode_(intercept_mode),
			result_(result) {
			Init();
			}

			void ScopedFakeTestPartResultReporter::Init() {
			internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
			if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
			old_reporter_ = impl->GetGlobalTestPartResultReporter();
			impl->SetGlobalTestPartResultReporter(this);
			} else {
			old_reporter_ = impl->GetTestPartResultReporterForCurrentThread();
			impl->SetTestPartResultReporterForCurrentThread(this);
			}
			}

			// The d'tor restores the test part result reporter used by Google Test
			// before.
			ScopedFakeTestPartResultReporter::~ScopedFakeTestPartResultReporter() {
			internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
			if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
			impl->SetGlobalTestPartResultReporter(old_reporter_);
			} else {
			impl->SetTestPartResultReporterForCurrentThread(old_reporter_);
			}
			}

			// Increments the test part result count and remembers the result.
			// This method is from the TestPartResultReporterInterface interface.
			void ScopedFakeTestPartResultReporter::ReportTestPartResult(
			const TestPartResult& result) {
			result_->Append(result);
			}

			namespace internal {

			// Returns the type ID of ::testing::Test. We should always call this
			// instead of GetTypeId< ::testing::Test>() to get the type ID of
			// testing::Test. This is to work around a suspected linker bug when
			// using Google Test as a framework on Mac OS X. The bug causes
			// GetTypeId< ::testing::Test>() to return different values depending
			// on whether the call is from the Google Test framework itself or
			// from user test code. GetTestTypeId() is guaranteed to always
			// return the same value, as it always calls GetTypeId<>() from the
			// gtest.cc, which is within the Google Test framework.
			TypeId GetTestTypeId() {
			return GetTypeId<Test>();
			}

			// The value of GetTestTypeId() as seen from within the Google Test
			// library. This is solely for testing GetTestTypeId().
			extern const TypeId kTestTypeIdInGoogleTest = GetTestTypeId();

			// This predicate-formatter checks that 'results' contains a test part
			// failure of the given type and that the failure message contains the
			// given substring.
			AssertionResult HasOneFailure(const char* /* results_expr */,
			const char* /* type_expr */,
			const char* /* substr_expr */,
			const TestPartResultArray& results,
			TestPartResult::Type type,
			const std::string& substr) {
			const std::string expected(type == TestPartResult::kFatalFailure ?
			"1 fatal failure" :
			"1 non-fatal failure");
			Message msg;
			if (results.size() != 1) {
			msg << "Expected: " << expected << "\n"
			<< " Actual: " << results.size() << " failures";
			for (int i = 0; i < results.size(); i++) {
			msg << "\n" << results.GetTestPartResult(i);
			}
			return AssertionFailure() << msg;
			}

			const TestPartResult& r = results.GetTestPartResult(0);
			if (r.type() != type) {
			return AssertionFailure() << "Expected: " << expected << "\n"
			<< " Actual:\n"
			<< r;
			}

			if (strstr(r.message(), substr.c_str()) == NULL) {
			return AssertionFailure() << "Expected: " << expected << " containing \""
			<< substr << "\"\n"
			<< " Actual:\n"
			<< r;
			}

			return AssertionSuccess();
			}

			// The constructor of SingleFailureChecker remembers where to look up
			// test part results, what type of failure we expect, and what
			// substring the failure message should contain.
			SingleFailureChecker::SingleFailureChecker(const TestPartResultArray* results,
			TestPartResult::Type type,
			const std::string& substr)
			: results_(results), type_(type), substr_(substr) {}

			// The destructor of SingleFailureChecker verifies that the given
			// TestPartResultArray contains exactly one failure that has the given
			// type and contains the given substring. If that's not the case, a
			// non-fatal failure will be generated.
			SingleFailureChecker::~SingleFailureChecker() {
			EXPECT_PRED_FORMAT3(HasOneFailure, *results_, type_, substr_);
			}

			DefaultGlobalTestPartResultReporter::DefaultGlobalTestPartResultReporter(
			UnitTestImpl* unit_test) : unit_test_(unit_test) {}

			void DefaultGlobalTestPartResultReporter::ReportTestPartResult(
			const TestPartResult& result) {
			unit_test_->current_test_result()->AddTestPartResult(result);
			unit_test_->listeners()->repeater()->OnTestPartResult(result);
			}

			DefaultPerThreadTestPartResultReporter::DefaultPerThreadTestPartResultReporter(
			UnitTestImpl* unit_test) : unit_test_(unit_test) {}

			void DefaultPerThreadTestPartResultReporter::ReportTestPartResult(
			const TestPartResult& result) {
			unit_test_->GetGlobalTestPartResultReporter()->ReportTestPartResult(result);
			}

			// Returns the global test part result reporter.
			TestPartResultReporterInterface*
			UnitTestImpl::GetGlobalTestPartResultReporter() {
			internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
			return global_test_part_result_repoter_;
			}

			// Sets the global test part result reporter.
			void UnitTestImpl::SetGlobalTestPartResultReporter(
			TestPartResultReporterInterface* reporter) {
			internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
			global_test_part_result_repoter_ = reporter;
			}

			// Returns the test part result reporter for the current thread.
			TestPartResultReporterInterface*
			UnitTestImpl::GetTestPartResultReporterForCurrentThread() {
			return per_thread_test_part_result_reporter_.get();
			}

			// Sets the test part result reporter for the current thread.
			void UnitTestImpl::SetTestPartResultReporterForCurrentThread(
			TestPartResultReporterInterface* reporter) {
			per_thread_test_part_result_reporter_.set(reporter);
			}

			// Gets the number of successful test cases.
			int UnitTestImpl::successful_test_case_count() const {
			return CountIf(test_cases_, TestCasePassed);
			}

			// Gets the number of failed test cases.
			int UnitTestImpl::failed_test_case_count() const {
			return CountIf(test_cases_, TestCaseFailed);
			}

			// Gets the number of all test cases.
			int UnitTestImpl::total_test_case_count() const {
			return static_cast<int>(test_cases_.size());
			}

			// Gets the number of all test cases that contain at least one test
			// that should run.
			int UnitTestImpl::test_case_to_run_count() const {
			return CountIf(test_cases_, ShouldRunTestCase);
			}

			// Gets the number of successful tests.
			int UnitTestImpl::successful_test_count() const {
			return SumOverTestCaseList(test_cases_, &TestCase::successful_test_count);
			}

			// Gets the number of failed tests.
			int UnitTestImpl::failed_test_count() const {
			return SumOverTestCaseList(test_cases_, &TestCase::failed_test_count);
			}

			// Gets the number of disabled tests that will be reported in the XML report.
			int UnitTestImpl::reportable_disabled_test_count() const {
			return SumOverTestCaseList(test_cases_,
			&TestCase::reportable_disabled_test_count);
			}

			// Gets the number of disabled tests.
			int UnitTestImpl::disabled_test_count() const {
			return SumOverTestCaseList(test_cases_, &TestCase::disabled_test_count);
			}

			// Gets the number of tests to be printed in the XML report.
			int UnitTestImpl::reportable_test_count() const {
			return SumOverTestCaseList(test_cases_, &TestCase::reportable_test_count);
			}

			// Gets the number of all tests.
			int UnitTestImpl::total_test_count() const {
			return SumOverTestCaseList(test_cases_, &TestCase::total_test_count);
			}

			// Gets the number of tests that should run.
			int UnitTestImpl::test_to_run_count() const {
			return SumOverTestCaseList(test_cases_, &TestCase::test_to_run_count);
			}

			// Returns the current OS stack trace as an std::string.
			//
			// The maximum number of stack frames to be included is specified by
			// the gtest_stack_trace_depth flag. The skip_count parameter
			// specifies the number of top frames to be skipped, which doesn't
			// count against the number of frames to be included.
			//
			// For example, if Foo() calls Bar(), which in turn calls
			// CurrentOsStackTraceExceptTop(1), Foo() will be included in the
			// trace but Bar() and CurrentOsStackTraceExceptTop() won't.
			std::string UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
			return os_stack_trace_getter()->CurrentStackTrace(
			static_cast<int>(GTEST_FLAG(stack_trace_depth)),
			skip_count + 1
			// Skips the user-specified number of frames plus this function
			// itself.
			); // NOLINT
			}

			// Returns the current time in milliseconds.
			TimeInMillis GetTimeInMillis() {
			#if GTEST_OS_WINDOWS_MOBILE \|\| defined(__BORLANDC__)
			// Difference between 1970-01-01 and 1601-01-01 in milliseconds.
			// http://analogous.blogspot.com/2005/04/epoch.html
			const TimeInMillis kJavaEpochToWinFileTimeDelta =
			static_cast<TimeInMillis>(116444736UL) * 100000UL;
			const DWORD kTenthMicrosInMilliSecond = 10000;

			SYSTEMTIME now_systime;
			FILETIME now_filetime;
			ULARGE_INTEGER now_int64;
			// TODO(kenton@google.com): Shouldn't this just use
			// GetSystemTimeAsFileTime()?
			GetSystemTime(&now_systime);
			if (SystemTimeToFileTime(&now_systime, &now_filetime)) {
			now_int64.LowPart = now_filetime.dwLowDateTime;
			now_int64.HighPart = now_filetime.dwHighDateTime;
			now_int64.QuadPart = (now_int64.QuadPart / kTenthMicrosInMilliSecond) -
			kJavaEpochToWinFileTimeDelta;
			return now_int64.QuadPart;
			}
			return 0;
			#elif GTEST_OS_WINDOWS && !GTEST_HAS_GETTIMEOFDAY_
			__timeb64 now;

			// MSVC 8 deprecates _ftime64(), so we want to suppress warning 4996
			// (deprecated function) there.
			// TODO(kenton@google.com): Use GetTickCount()? Or use
			// SystemTimeToFileTime()
			GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
			_ftime64(&now);
			GTEST_DISABLE_MSC_WARNINGS_POP_()

			return static_cast<TimeInMillis>(now.time) * 1000 + now.millitm;
			#elif GTEST_HAS_GETTIMEOFDAY_
			struct timeval now;
			gettimeofday(&now, NULL);
			return static_cast<TimeInMillis>(now.tv_sec) * 1000 + now.tv_usec / 1000;
			#else
			# error "Don't know how to get the current time on your system."
			#endif
			}

			// Utilities

			// class String.

			#if GTEST_OS_WINDOWS_MOBILE
			// Creates a UTF-16 wide string from the given ANSI string, allocating
			// memory using new. The caller is responsible for deleting the return
			// value using delete[]. Returns the wide string, or NULL if the
			// input is NULL.
			LPCWSTR String::AnsiToUtf16(const char* ansi) {
			if (!ansi) return NULL;
			const int length = strlen(ansi);
			const int unicode_length =
			MultiByteToWideChar(CP_ACP, 0, ansi, length,
			NULL, 0);
			WCHAR* unicode = new WCHAR[unicode_length + 1];
			MultiByteToWideChar(CP_ACP, 0, ansi, length,
			unicode, unicode_length);
			unicode[unicode_length] = 0;
			return unicode;
			}

			// Creates an ANSI string from the given wide string, allocating
			// memory using new. The caller is responsible for deleting the return
			// value using delete[]. Returns the ANSI string, or NULL if the
			// input is NULL.
			const char* String::Utf16ToAnsi(LPCWSTR utf16_str) {
			if (!utf16_str) return NULL;
			const int ansi_length =
			WideCharToMultiByte(CP_ACP, 0, utf16_str, -1,
			NULL, 0, NULL, NULL);
			char* ansi = new char[ansi_length + 1];
			WideCharToMultiByte(CP_ACP, 0, utf16_str, -1,
			ansi, ansi_length, NULL, NULL);
			ansi[ansi_length] = 0;
			return ansi;
			}

			#endif // GTEST_OS_WINDOWS_MOBILE

			// Compares two C strings. Returns true iff they have the same content.
			//
			// Unlike strcmp(), this function can handle NULL argument(s). A NULL
			// C string is considered different to any non-NULL C string,
			// including the empty string.
			bool String::CStringEquals(const char * lhs, const char * rhs) {
			if ( lhs == NULL ) return rhs == NULL;

			if ( rhs == NULL ) return false;

			return strcmp(lhs, rhs) == 0;
			}

			#if GTEST_HAS_STD_WSTRING \|\| GTEST_HAS_GLOBAL_WSTRING

			// Converts an array of wide chars to a narrow string using the UTF-8
			// encoding, and streams the result to the given Message object.
			static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
			Message* msg) {
			for (size_t i = 0; i != length; ) { // NOLINT
			if (wstr[i] != L'\0') {
			*msg << WideStringToUtf8(wstr + i, static_cast<int>(length - i));
			while (i != length && wstr[i] != L'\0')
			i++;
			} else {
			*msg << '\0';
			i++;
			}
			}
			}

			#endif // GTEST_HAS_STD_WSTRING \|\| GTEST_HAS_GLOBAL_WSTRING

			void SplitString(const ::std::string& str, char delimiter,
			::std::vector< ::std::string>* dest) {
			::std::vector< ::std::string> parsed;
			::std::string::size_type pos = 0;
			while (::testing::internal::AlwaysTrue()) {
			const ::std::string::size_type colon = str.find(delimiter, pos);
			if (colon == ::std::string::npos) {
			parsed.push_back(str.substr(pos));
			break;
			} else {
			parsed.push_back(str.substr(pos, colon - pos));
			pos = colon + 1;
			}
			}
			dest->swap(parsed);
			}

			} // namespace internal

			// Constructs an empty Message.
			// We allocate the stringstream separately because otherwise each use of
			// ASSERT/EXPECT in a procedure adds over 200 bytes to the procedure's
			// stack frame leading to huge stack frames in some cases; gcc does not reuse
			// the stack space.
			Message::Message() : ss_(new ::std::stringstream) {
			// By default, we want there to be enough precision when printing
			// a double to a Message.
			*ss_ << std::setprecision(std::numeric_limits<double>::digits10 + 2);
			}

			// These two overloads allow streaming a wide C string to a Message
			// using the UTF-8 encoding.
			Message& Message::operator <<(const wchar_t* wide_c_str) {
			return *this << internal::String::ShowWideCString(wide_c_str);
			}
			Message& Message::operator <<(wchar_t* wide_c_str) {
			return *this << internal::String::ShowWideCString(wide_c_str);
			}

			#if GTEST_HAS_STD_WSTRING
			// Converts the given wide string to a narrow string using the UTF-8
			// encoding, and streams the result to this Message object.
			Message& Message::operator <<(const ::std::wstring& wstr) {
			internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
			return *this;
			}
			#endif // GTEST_HAS_STD_WSTRING

			#if GTEST_HAS_GLOBAL_WSTRING
			// Converts the given wide string to a narrow string using the UTF-8
			// encoding, and streams the result to this Message object.
			Message& Message::operator <<(const ::wstring& wstr) {
			internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
			return *this;
			}
			#endif // GTEST_HAS_GLOBAL_WSTRING

			// Gets the text streamed to this object so far as an std::string.
			// Each '\0' character in the buffer is replaced with "\\0".
			std::string Message::GetString() const {
			return internal::StringStreamToString(ss_.get());
			}

			// AssertionResult constructors.
			// Used in EXPECT_TRUE/FALSE(assertion_result).
			AssertionResult::AssertionResult(const AssertionResult& other)
			: success_(other.success_),
			message_(other.message_.get() != NULL ?
			new ::std::string(*other.message_) :
			static_cast< ::std::string*>(NULL)) {
			}

			// Swaps two AssertionResults.
			void AssertionResult::swap(AssertionResult& other) {
			using std::swap;
			swap(success_, other.success_);
			swap(message_, other.message_);
			}

			// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
			AssertionResult AssertionResult::operator!() const {
			AssertionResult negation(!success_);
			if (message_.get() != NULL)
			negation << *message_;
			return negation;
			}

			// Makes a successful assertion result.
			AssertionResult AssertionSuccess() {
			return AssertionResult(true);
			}

			// Makes a failed assertion result.
			AssertionResult AssertionFailure() {
			return AssertionResult(false);
			}

			// Makes a failed assertion result with the given failure message.
			// Deprecated; use AssertionFailure() << message.
			AssertionResult AssertionFailure(const Message& message) {
			return AssertionFailure() << message;
			}

			namespace internal {

			namespace edit_distance {
			std::vector<EditType> CalculateOptimalEdits(const std::vector<size_t>& left,
			const std::vector<size_t>& right) {
			std::vector<std::vector<double> > costs(
			left.size() + 1, std::vector<double>(right.size() + 1));
			std::vector<std::vector<EditType> > best_move(
			left.size() + 1, std::vector<EditType>(right.size() + 1));

			// Populate for empty right.
			for (size_t l_i = 0; l_i < costs.size(); ++l_i) {
			costs[l_i][0] = static_cast<double>(l_i);
			best_move[l_i][0] = kRemove;
			}
			// Populate for empty left.
			for (size_t r_i = 1; r_i < costs[0].size(); ++r_i) {
			costs[0][r_i] = static_cast<double>(r_i);
			best_move[0][r_i] = kAdd;
			}

			for (size_t l_i = 0; l_i < left.size(); ++l_i) {
			for (size_t r_i = 0; r_i < right.size(); ++r_i) {
			if (left[l_i] == right[r_i]) {
			// Found a match. Consume it.
			costs[l_i + 1][r_i + 1] = costs[l_i][r_i];
			best_move[l_i + 1][r_i + 1] = kMatch;
			continue;
			}

			const double add = costs[l_i + 1][r_i];
			const double remove = costs[l_i][r_i + 1];
			const double replace = costs[l_i][r_i];
			if (add < remove && add < replace) {
			costs[l_i + 1][r_i + 1] = add + 1;
			best_move[l_i + 1][r_i + 1] = kAdd;
			} else if (remove < add && remove < replace) {
			costs[l_i + 1][r_i + 1] = remove + 1;
			best_move[l_i + 1][r_i + 1] = kRemove;
			} else {
			// We make replace a little more expensive than add/remove to lower
			// their priority.
			costs[l_i + 1][r_i + 1] = replace + 1.00001;
			best_move[l_i + 1][r_i + 1] = kReplace;
			}
			}
			}

			// Reconstruct the best path. We do it in reverse order.
			std::vector<EditType> best_path;
			for (size_t l_i = left.size(), r_i = right.size(); l_i > 0 \|\| r_i > 0;) {
			EditType move = best_move[l_i][r_i];
			best_path.push_back(move);
			l_i -= move != kAdd;
			r_i -= move != kRemove;
			}
			std::reverse(best_path.begin(), best_path.end());
			return best_path;
			}

			namespace {

			// Helper class to convert string into ids with deduplication.
			class InternalStrings {
			public:
			size_t GetId(const std::string& str) {
			IdMap::iterator it = ids_.find(str);
			if (it != ids_.end()) return it->second;
			size_t id = ids_.size();
			return ids_[str] = id;
			}

			private:
			typedef std::map<std::string, size_t> IdMap;
			IdMap ids_;
			};

			} // namespace

			std::vector<EditType> CalculateOptimalEdits(
			const std::vector<std::string>& left,
			const std::vector<std::string>& right) {
			std::vector<size_t> left_ids, right_ids;
			{
			InternalStrings intern_table;
			for (size_t i = 0; i < left.size(); ++i) {
			left_ids.push_back(intern_table.GetId(left[i]));
			}
			for (size_t i = 0; i < right.size(); ++i) {
			right_ids.push_back(intern_table.GetId(right[i]));
			}
			}
			return CalculateOptimalEdits(left_ids, right_ids);
			}

			namespace {

			// Helper class that holds the state for one hunk and prints it out to the
			// stream.
			// It reorders adds/removes when possible to group all removes before all
			// adds. It also adds the hunk header before printint into the stream.
			class Hunk {
			public:
			Hunk(size_t left_start, size_t right_start)
			: left_start_(left_start),
			right_start_(right_start),
			adds_(),
			removes_(),
			common_() {}

			void PushLine(char edit, const char* line) {
			switch (edit) {
			case ' ':
			++common_;
			FlushEdits();
			hunk_.push_back(std::make_pair(' ', line));
			break;
			case '-':
			++removes_;
			hunk_removes_.push_back(std::make_pair('-', line));
			break;
			case '+':
			++adds_;
			hunk_adds_.push_back(std::make_pair('+', line));
			break;
			}
			}

			void PrintTo(std::ostream* os) {
			PrintHeader(os);
			FlushEdits();
			for (std::list<std::pair<char, const char*> >::const_iterator it =
			hunk_.begin();
			it != hunk_.end(); ++it) {
			*os << it->first << it->second << "\n";
			}
			}

			bool has_edits() const { return adds_ \|\| removes_; }

			private:
			void FlushEdits() {
			hunk_.splice(hunk_.end(), hunk_removes_);
			hunk_.splice(hunk_.end(), hunk_adds_);
			}

			// Print a unified diff header for one hunk.
			// The format is
			// "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
			// where the left/right parts are omitted if unnecessary.
			void PrintHeader(std::ostream* ss) const {
			*ss << "@@ ";
			if (removes_) {
			*ss << "-" << left_start_ << "," << (removes_ + common_);
			}
			if (removes_ && adds_) {
			*ss << " ";
			}
			if (adds_) {
			*ss << "+" << right_start_ << "," << (adds_ + common_);
			}
			*ss << " @@\n";
			}

			size_t left_start_, right_start_;
			size_t adds_, removes_, common_;
			std::list<std::pair<char, const char*> > hunk_, hunk_adds_, hunk_removes_;
			};

			} // namespace

			// Create a list of diff hunks in Unified diff format.
			// Each hunk has a header generated by PrintHeader above plus a body with
			// lines prefixed with ' ' for no change, '-' for deletion and '+' for
			// addition.
			// 'context' represents the desired unchanged prefix/suffix around the diff.
			// If two hunks are close enough that their contexts overlap, then they are
			// joined into one hunk.
			std::string CreateUnifiedDiff(const std::vector<std::string>& left,
			const std::vector<std::string>& right,
			size_t context) {
			const std::vector<EditType> edits = CalculateOptimalEdits(left, right);

			size_t l_i = 0, r_i = 0, edit_i = 0;
			std::stringstream ss;
			while (edit_i < edits.size()) {
			// Find first edit.
			while (edit_i < edits.size() && edits[edit_i] == kMatch) {
			++l_i;
			++r_i;
			++edit_i;
			}

			// Find the first line to include in the hunk.
			const size_t prefix_context = std::min(l_i, context);
			Hunk hunk(l_i - prefix_context + 1, r_i - prefix_context + 1);
			for (size_t i = prefix_context; i > 0; --i) {
			hunk.PushLine(' ', left[l_i - i].c_str());
			}

			// Iterate the edits until we found enough suffix for the hunk or the input
			// is over.
			size_t n_suffix = 0;
			for (; edit_i < edits.size(); ++edit_i) {
			if (n_suffix >= context) {
			// Continue only if the next hunk is very close.
			std::vector<EditType>::const_iterator it = edits.begin() + edit_i;
			while (it != edits.end() && *it == kMatch) ++it;
			if (it == edits.end() \|\| (it - edits.begin()) - edit_i >= context) {
			// There is no next edit or it is too far away.
			break;
			}
			}

			EditType edit = edits[edit_i];
			// Reset count when a non match is found.
			n_suffix = edit == kMatch ? n_suffix + 1 : 0;

			if (edit == kMatch \|\| edit == kRemove \|\| edit == kReplace) {
			hunk.PushLine(edit == kMatch ? ' ' : '-', left[l_i].c_str());
			}
			if (edit == kAdd \|\| edit == kReplace) {
			hunk.PushLine('+', right[r_i].c_str());
			}

			// Advance indices, depending on edit type.
			l_i += edit != kAdd;
			r_i += edit != kRemove;
			}

			if (!hunk.has_edits()) {
			// We are done. We don't want this hunk.
			break;
			}

			hunk.PrintTo(&ss);
			}
			return ss.str();
			}

			} // namespace edit_distance

			namespace {

			// The string representation of the values received in EqFailure() are already
			// escaped. Split them on escaped '\n' boundaries. Leave all other escaped
			// characters the same.
			std::vector<std::string> SplitEscapedString(const std::string& str) {
			std::vector<std::string> lines;
			size_t start = 0, end = str.size();
			if (end > 2 && str[0] == '"' && str[end - 1] == '"') {
			++start;
			--end;
			}
			bool escaped = false;
			for (size_t i = start; i + 1 < end; ++i) {
			if (escaped) {
			escaped = false;
			if (str[i] == 'n') {
			lines.push_back(str.substr(start, i - start - 1));
			start = i + 1;
			}
			} else {
			escaped = str[i] == '\\';
			}
			}
			lines.push_back(str.substr(start, end - start));
			return lines;
			}

			} // namespace

			// Constructs and returns the message for an equality assertion
			// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
			//
			// The first four parameters are the expressions used in the assertion
			// and their values, as strings. For example, for ASSERT_EQ(foo, bar)
			// where foo is 5 and bar is 6, we have:
			//
			// lhs_expression: "foo"
			// rhs_expression: "bar"
			// lhs_value: "5"
			// rhs_value: "6"
			//
			// The ignoring_case parameter is true iff the assertion is a
			// _STRCASEEQ. When it's true, the string "Ignoring case" will
			// be inserted into the message.
			AssertionResult EqFailure(const char* lhs_expression,
			const char* rhs_expression,
			const std::string& lhs_value,
			const std::string& rhs_value,
			bool ignoring_case) {
			Message msg;
			msg << "Expected equality of these values:";
			msg << "\n " << lhs_expression;
			if (lhs_value != lhs_expression) {
			msg << "\n Which is: " << lhs_value;
			}
			msg << "\n " << rhs_expression;
			if (rhs_value != rhs_expression) {
			msg << "\n Which is: " << rhs_value;
			}

			if (ignoring_case) {
			msg << "\nIgnoring case";
			}

			if (!lhs_value.empty() && !rhs_value.empty()) {
			const std::vector<std::string> lhs_lines =
			SplitEscapedString(lhs_value);
			const std::vector<std::string> rhs_lines =
			SplitEscapedString(rhs_value);
			if (lhs_lines.size() > 1 \|\| rhs_lines.size() > 1) {
			msg << "\nWith diff:\n"
			<< edit_distance::CreateUnifiedDiff(lhs_lines, rhs_lines);
			}
			}

			return AssertionFailure() << msg;
			}

			// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
			std::string GetBoolAssertionFailureMessage(
			const AssertionResult& assertion_result,
			const char* expression_text,
			const char* actual_predicate_value,
			const char* expected_predicate_value) {
			const char* actual_message = assertion_result.message();
			Message msg;
			msg << "Value of: " << expression_text
			<< "\n Actual: " << actual_predicate_value;
			if (actual_message[0] != '\0')
			msg << " (" << actual_message << ")";
			msg << "\nExpected: " << expected_predicate_value;
			return msg.GetString();
			}

			// Helper function for implementing ASSERT_NEAR.
			AssertionResult DoubleNearPredFormat(const char* expr1,
			const char* expr2,
			const char* abs_error_expr,
			double val1,
			double val2,
			double abs_error) {
			const double diff = fabs(val1 - val2);
			if (diff <= abs_error) return AssertionSuccess();

			// TODO(wan): do not print the value of an expression if it's
			// already a literal.
			return AssertionFailure()
			<< "The difference between " << expr1 << " and " << expr2
			<< " is " << diff << ", which exceeds " << abs_error_expr << ", where\n"
			<< expr1 << " evaluates to " << val1 << ",\n"
			<< expr2 << " evaluates to " << val2 << ", and\n"
			<< abs_error_expr << " evaluates to " << abs_error << ".";
			}


			// Helper template for implementing FloatLE() and DoubleLE().
			template <typename RawType>
			AssertionResult FloatingPointLE(const char* expr1,
			const char* expr2,
			RawType val1,
			RawType val2) {
			// Returns success if val1 is less than val2,
			if (val1 < val2) {
			return AssertionSuccess();
			}

			// or if val1 is almost equal to val2.
			const FloatingPoint<RawType> lhs(val1), rhs(val2);
			if (lhs.AlmostEquals(rhs)) {
			return AssertionSuccess();
			}

			// Note that the above two checks will both fail if either val1 or
			// val2 is NaN, as the IEEE floating-point standard requires that
			// any predicate involving a NaN must return false.

			::std::stringstream val1_ss;
			val1_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
			<< val1;

			::std::stringstream val2_ss;
			val2_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
			<< val2;

			return AssertionFailure()
			<< "Expected: (" << expr1 << ") <= (" << expr2 << ")\n"
			<< " Actual: " << StringStreamToString(&val1_ss) << " vs "
			<< StringStreamToString(&val2_ss);
			}

			} // namespace internal

			// Asserts that val1 is less than, or almost equal to, val2. Fails
			// otherwise. In particular, it fails if either val1 or val2 is NaN.
			AssertionResult FloatLE(const char* expr1, const char* expr2,
			float val1, float val2) {
			return internal::FloatingPointLE<float>(expr1, expr2, val1, val2);
			}

			// Asserts that val1 is less than, or almost equal to, val2. Fails
			// otherwise. In particular, it fails if either val1 or val2 is NaN.
			AssertionResult DoubleLE(const char* expr1, const char* expr2,
			double val1, double val2) {
			return internal::FloatingPointLE<double>(expr1, expr2, val1, val2);
			}

			namespace internal {

			// The helper function for {ASSERT\|EXPECT}_EQ with int or enum
			// arguments.
			AssertionResult CmpHelperEQ(const char* lhs_expression,
			const char* rhs_expression,
			BiggestInt lhs,
			BiggestInt rhs) {
			if (lhs == rhs) {
			return AssertionSuccess();
			}

			return EqFailure(lhs_expression,
			rhs_expression,
			FormatForComparisonFailureMessage(lhs, rhs),
			FormatForComparisonFailureMessage(rhs, lhs),
			false);
			}

			// A macro for implementing the helper functions needed to implement
			// ASSERT_?? and EXPECT_?? with integer or enum arguments. It is here
			// just to avoid copy-and-paste of similar code.
			#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
			AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
			BiggestInt val1, BiggestInt val2) {\
			if (val1 op val2) {\
			return AssertionSuccess();\
			} else {\
			return AssertionFailure() \
			<< "Expected: (" << expr1 << ") " #op " (" << expr2\
			<< "), actual: " << FormatForComparisonFailureMessage(val1, val2)\
			<< " vs " << FormatForComparisonFailureMessage(val2, val1);\
			}\
			}

			// Implements the helper function for {ASSERT\|EXPECT}_NE with int or
			// enum arguments.
			GTEST_IMPL_CMP_HELPER_(NE, !=)
			// Implements the helper function for {ASSERT\|EXPECT}_LE with int or
			// enum arguments.
			GTEST_IMPL_CMP_HELPER_(LE, <=)
			// Implements the helper function for {ASSERT\|EXPECT}_LT with int or
			// enum arguments.
			GTEST_IMPL_CMP_HELPER_(LT, < )
			// Implements the helper function for {ASSERT\|EXPECT}_GE with int or
			// enum arguments.
			GTEST_IMPL_CMP_HELPER_(GE, >=)
			// Implements the helper function for {ASSERT\|EXPECT}_GT with int or
			// enum arguments.
			GTEST_IMPL_CMP_HELPER_(GT, > )

			#undef GTEST_IMPL_CMP_HELPER_

			// The helper function for {ASSERT\|EXPECT}_STREQ.
			AssertionResult CmpHelperSTREQ(const char* lhs_expression,
			const char* rhs_expression,
			const char* lhs,
			const char* rhs) {
			if (String::CStringEquals(lhs, rhs)) {
			return AssertionSuccess();
			}

			return EqFailure(lhs_expression,
			rhs_expression,
			PrintToString(lhs),
			PrintToString(rhs),
			false);
			}

			// The helper function for {ASSERT\|EXPECT}_STRCASEEQ.
			AssertionResult CmpHelperSTRCASEEQ(const char* lhs_expression,
			const char* rhs_expression,
			const char* lhs,
			const char* rhs) {
			if (String::CaseInsensitiveCStringEquals(lhs, rhs)) {
			return AssertionSuccess();
			}

			return EqFailure(lhs_expression,
			rhs_expression,
			PrintToString(lhs),
			PrintToString(rhs),
			true);
			}

			// The helper function for {ASSERT\|EXPECT}_STRNE.
			AssertionResult CmpHelperSTRNE(const char* s1_expression,
			const char* s2_expression,
			const char* s1,
			const char* s2) {
			if (!String::CStringEquals(s1, s2)) {
			return AssertionSuccess();
			} else {
			return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
			<< s2_expression << "), actual: \""
			<< s1 << "\" vs \"" << s2 << "\"";
			}
			}

			// The helper function for {ASSERT\|EXPECT}_STRCASENE.
			AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
			const char* s2_expression,
			const char* s1,
			const char* s2) {
			if (!String::CaseInsensitiveCStringEquals(s1, s2)) {
			return AssertionSuccess();
			} else {
			return AssertionFailure()
			<< "Expected: (" << s1_expression << ") != ("
			<< s2_expression << ") (ignoring case), actual: \""
			<< s1 << "\" vs \"" << s2 << "\"";
			}
			}

			} // namespace internal

			namespace {

			// Helper functions for implementing IsSubString() and IsNotSubstring().

			// This group of overloaded functions return true iff needle is a
			// substring of haystack. NULL is considered a substring of itself
			// only.

			bool IsSubstringPred(const char* needle, const char* haystack) {
			if (needle == NULL \|\| haystack == NULL)
			return needle == haystack;

			return strstr(haystack, needle) != NULL;
			}

			bool IsSubstringPred(const wchar_t* needle, const wchar_t* haystack) {
			if (needle == NULL \|\| haystack == NULL)
			return needle == haystack;

			return wcsstr(haystack, needle) != NULL;
			}

			// StringType here can be either ::std::string or ::std::wstring.
			template <typename StringType>
			bool IsSubstringPred(const StringType& needle,
			const StringType& haystack) {
			return haystack.find(needle) != StringType::npos;
			}

			// This function implements either IsSubstring() or IsNotSubstring(),
			// depending on the value of the expected_to_be_substring parameter.
			// StringType here can be const char, const wchar_t, ::std::string,
			// or ::std::wstring.
			template <typename StringType>
			AssertionResult IsSubstringImpl(
			bool expected_to_be_substring,
			const char* needle_expr, const char* haystack_expr,
			const StringType& needle, const StringType& haystack) {
			if (IsSubstringPred(needle, haystack) == expected_to_be_substring)
			return AssertionSuccess();

			const bool is_wide_string = sizeof(needle[0]) > 1;
			const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
			return AssertionFailure()
			<< "Value of: " << needle_expr << "\n"
			<< " Actual: " << begin_string_quote << needle << "\"\n"
			<< "Expected: " << (expected_to_be_substring ? "" : "not ")
			<< "a substring of " << haystack_expr << "\n"
			<< "Which is: " << begin_string_quote << haystack << "\"";
			}

			} // namespace

			// IsSubstring() and IsNotSubstring() check whether needle is a
			// substring of haystack (NULL is considered a substring of itself
			// only), and return an appropriate error message when they fail.

			AssertionResult IsSubstring(
			const char* needle_expr, const char* haystack_expr,
			const char* needle, const char* haystack) {
			return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
			}

			AssertionResult IsSubstring(
			const char* needle_expr, const char* haystack_expr,
			const wchar_t* needle, const wchar_t* haystack) {
			return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
			}

			AssertionResult IsNotSubstring(
			const char* needle_expr, const char* haystack_expr,
			const char* needle, const char* haystack) {
			return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
			}

			AssertionResult IsNotSubstring(
			const char* needle_expr, const char* haystack_expr,
			const wchar_t* needle, const wchar_t* haystack) {
			return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
			}

			AssertionResult IsSubstring(
			const char* needle_expr, const char* haystack_expr,
			const ::std::string& needle, const ::std::string& haystack) {
			return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
			}

			AssertionResult IsNotSubstring(
			const char* needle_expr, const char* haystack_expr,
			const ::std::string& needle, const ::std::string& haystack) {
			return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
			}

			#if GTEST_HAS_STD_WSTRING
			AssertionResult IsSubstring(
			const char* needle_expr, const char* haystack_expr,
			const ::std::wstring& needle, const ::std::wstring& haystack) {
			return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
			}

			AssertionResult IsNotSubstring(
			const char* needle_expr, const char* haystack_expr,
			const ::std::wstring& needle, const ::std::wstring& haystack) {
			return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
			}
			#endif // GTEST_HAS_STD_WSTRING

			namespace internal {

			#if GTEST_OS_WINDOWS

			namespace {

			// Helper function for IsHRESULT{SuccessFailure} predicates
			AssertionResult HRESULTFailureHelper(const char* expr,
			const char* expected,
			long hr) { // NOLINT
			# if GTEST_OS_WINDOWS_MOBILE

			// Windows CE doesn't support FormatMessage.
			const char error_text[] = "";

			# else

			// Looks up the human-readable system message for the HRESULT code
			// and since we're not passing any params to FormatMessage, we don't
			// want inserts expanded.
			const DWORD kFlags = FORMAT_MESSAGE_FROM_SYSTEM \|
			FORMAT_MESSAGE_IGNORE_INSERTS;
			const DWORD kBufSize = 4096;
			// Gets the system's human readable message string for this HRESULT.
			char error_text[kBufSize] = { '\0' };
			DWORD message_length = ::FormatMessageA(kFlags,
			0, // no source, we're asking system
			hr, // the error
			0, // no line width restrictions
			error_text, // output buffer
			kBufSize, // buf size
			NULL); // no arguments for inserts
			// Trims tailing white space (FormatMessage leaves a trailing CR-LF)
			for (; message_length && IsSpace(error_text[message_length - 1]);
			--message_length) {
			error_text[message_length - 1] = '\0';
			}

			# endif // GTEST_OS_WINDOWS_MOBILE

			const std::string error_hex("0x" + String::FormatHexInt(hr));
			return ::testing::AssertionFailure()
			<< "Expected: " << expr << " " << expected << ".\n"
			<< " Actual: " << error_hex << " " << error_text << "\n";
			}

			} // namespace

			AssertionResult IsHRESULTSuccess(const char* expr, long hr) { // NOLINT
			if (SUCCEEDED(hr)) {
			return AssertionSuccess();
			}
			return HRESULTFailureHelper(expr, "succeeds", hr);
			}

			AssertionResult IsHRESULTFailure(const char* expr, long hr) { // NOLINT
			if (FAILED(hr)) {
			return AssertionSuccess();
			}
			return HRESULTFailureHelper(expr, "fails", hr);
			}

			#endif // GTEST_OS_WINDOWS

			// Utility functions for encoding Unicode text (wide strings) in
			// UTF-8.

			// A Unicode code-point can have upto 21 bits, and is encoded in UTF-8
			// like this:
			//
			// Code-point length Encoding
			// 0 - 7 bits 0xxxxxxx
			// 8 - 11 bits 110xxxxx 10xxxxxx
			// 12 - 16 bits 1110xxxx 10xxxxxx 10xxxxxx
			// 17 - 21 bits 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx

			// The maximum code-point a one-byte UTF-8 sequence can represent.
			const UInt32 kMaxCodePoint1 = (static_cast<UInt32>(1) << 7) - 1;

			// The maximum code-point a two-byte UTF-8 sequence can represent.
			const UInt32 kMaxCodePoint2 = (static_cast<UInt32>(1) << (5 + 6)) - 1;

			// The maximum code-point a three-byte UTF-8 sequence can represent.
			const UInt32 kMaxCodePoint3 = (static_cast<UInt32>(1) << (4 + 2*6)) - 1;

			// The maximum code-point a four-byte UTF-8 sequence can represent.
			const UInt32 kMaxCodePoint4 = (static_cast<UInt32>(1) << (3 + 3*6)) - 1;

			// Chops off the n lowest bits from a bit pattern. Returns the n
			// lowest bits. As a side effect, the original bit pattern will be
			// shifted to the right by n bits.
			inline UInt32 ChopLowBits(UInt32* bits, int n) {
			const UInt32 low_bits = *bits & ((static_cast<UInt32>(1) << n) - 1);
			*bits >>= n;
			return low_bits;
			}

			// Converts a Unicode code point to a narrow string in UTF-8 encoding.
			// code_point parameter is of type UInt32 because wchar_t may not be
			// wide enough to contain a code point.
			// If the code_point is not a valid Unicode code point
			// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
			// to "(Invalid Unicode 0xXXXXXXXX)".
			std::string CodePointToUtf8(UInt32 code_point) {
			if (code_point > kMaxCodePoint4) {
			return "(Invalid Unicode 0x" + String::FormatHexInt(code_point) + ")";
			}

			char str[5]; // Big enough for the largest valid code point.
			if (code_point <= kMaxCodePoint1) {
			str[1] = '\0';
			str[0] = static_cast<char>(code_point); // 0xxxxxxx
			} else if (code_point <= kMaxCodePoint2) {
			str[2] = '\0';
			str[1] = static_cast<char>(0x80 \| ChopLowBits(&code_point, 6)); // 10xxxxxx
			str[0] = static_cast<char>(0xC0 \| code_point); // 110xxxxx
			} else if (code_point <= kMaxCodePoint3) {
			str[3] = '\0';
			str[2] = static_cast<char>(0x80 \| ChopLowBits(&code_point, 6)); // 10xxxxxx
			str[1] = static_cast<char>(0x80 \| ChopLowBits(&code_point, 6)); // 10xxxxxx
			str[0] = static_cast<char>(0xE0 \| code_point); // 1110xxxx
			} else { // code_point <= kMaxCodePoint4
			str[4] = '\0';
			str[3] = static_cast<char>(0x80 \| ChopLowBits(&code_point, 6)); // 10xxxxxx
			str[2] = static_cast<char>(0x80 \| ChopLowBits(&code_point, 6)); // 10xxxxxx
			str[1] = static_cast<char>(0x80 \| ChopLowBits(&code_point, 6)); // 10xxxxxx
			str[0] = static_cast<char>(0xF0 \| code_point); // 11110xxx
			}
			return str;
			}

			// The following two functions only make sense if the system
			// uses UTF-16 for wide string encoding. All supported systems
			// with 16 bit wchar_t (Windows, Cygwin, Symbian OS) do use UTF-16.

			// Determines if the arguments constitute UTF-16 surrogate pair
			// and thus should be combined into a single Unicode code point
			// using CreateCodePointFromUtf16SurrogatePair.
			inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
			return sizeof(wchar_t) == 2 &&
			(first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
			}

			// Creates a Unicode code point from UTF16 surrogate pair.
			inline UInt32 CreateCodePointFromUtf16SurrogatePair(wchar_t first,
			wchar_t second) {
			const UInt32 mask = (1 << 10) - 1;
			return (sizeof(wchar_t) == 2) ?
			(((first & mask) << 10) \| (second & mask)) + 0x10000 :
			// This function should not be called when the condition is
			// false, but we provide a sensible default in case it is.
			static_cast<UInt32>(first);
			}

			// Converts a wide string to a narrow string in UTF-8 encoding.
			// The wide string is assumed to have the following encoding:
			// UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin, Symbian OS)
			// UTF-32 if sizeof(wchar_t) == 4 (on Linux)
			// Parameter str points to a null-terminated wide string.
			// Parameter num_chars may additionally limit the number
			// of wchar_t characters processed. -1 is used when the entire string
			// should be processed.
			// If the string contains code points that are not valid Unicode code points
			// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
			// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
			// and contains invalid UTF-16 surrogate pairs, values in those pairs
			// will be encoded as individual Unicode characters from Basic Normal Plane.
			std::string WideStringToUtf8(const wchar_t* str, int num_chars) {
			if (num_chars == -1)
			num_chars = static_cast<int>(wcslen(str));

			::std::stringstream stream;
			for (int i = 0; i < num_chars; ++i) {
			UInt32 unicode_code_point;

			if (str[i] == L'\0') {
			break;
			} else if (i + 1 < num_chars && IsUtf16SurrogatePair(str[i], str[i + 1])) {
			unicode_code_point = CreateCodePointFromUtf16SurrogatePair(str[i],
			str[i + 1]);
			i++;
			} else {
			unicode_code_point = static_cast<UInt32>(str[i]);
			}

			stream << CodePointToUtf8(unicode_code_point);
			}
			return StringStreamToString(&stream);
			}

			// Converts a wide C string to an std::string using the UTF-8 encoding.
			// NULL will be converted to "(null)".
			std::string String::ShowWideCString(const wchar_t * wide_c_str) {
			if (wide_c_str == NULL) return "(null)";

			return internal::WideStringToUtf8(wide_c_str, -1);
			}

			// Compares two wide C strings. Returns true iff they have the same
			// content.
			//
			// Unlike wcscmp(), this function can handle NULL argument(s). A NULL
			// C string is considered different to any non-NULL C string,
			// including the empty string.
			bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
			if (lhs == NULL) return rhs == NULL;

			if (rhs == NULL) return false;

			return wcscmp(lhs, rhs) == 0;
			}

			// Helper function for *_STREQ on wide strings.
			AssertionResult CmpHelperSTREQ(const char* lhs_expression,
			const char* rhs_expression,
			const wchar_t* lhs,
			const wchar_t* rhs) {
			if (String::WideCStringEquals(lhs, rhs)) {
			return AssertionSuccess();
			}

			return EqFailure(lhs_expression,
			rhs_expression,
			PrintToString(lhs),
			PrintToString(rhs),
			false);
			}

			// Helper function for *_STRNE on wide strings.
			AssertionResult CmpHelperSTRNE(const char* s1_expression,
			const char* s2_expression,
			const wchar_t* s1,
			const wchar_t* s2) {
			if (!String::WideCStringEquals(s1, s2)) {
			return AssertionSuccess();
			}

			return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
			<< s2_expression << "), actual: "
			<< PrintToString(s1)
			<< " vs " << PrintToString(s2);
			}

			// Compares two C strings, ignoring case. Returns true iff they have
			// the same content.
			//
			// Unlike strcasecmp(), this function can handle NULL argument(s). A
			// NULL C string is considered different to any non-NULL C string,
			// including the empty string.
			bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
			if (lhs == NULL)
			return rhs == NULL;
			if (rhs == NULL)
			return false;
			return posix::StrCaseCmp(lhs, rhs) == 0;
			}

			// Compares two wide C strings, ignoring case. Returns true iff they
			// have the same content.
			//
			// Unlike wcscasecmp(), this function can handle NULL argument(s).
			// A NULL C string is considered different to any non-NULL wide C string,
			// including the empty string.
			// NB: The implementations on different platforms slightly differ.
			// On windows, this method uses _wcsicmp which compares according to LC_CTYPE
			// environment variable. On GNU platform this method uses wcscasecmp
			// which compares according to LC_CTYPE category of the current locale.
			// On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
			// current locale.
			bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
			const wchar_t* rhs) {
			if (lhs == NULL) return rhs == NULL;

			if (rhs == NULL) return false;

			#if GTEST_OS_WINDOWS
			return _wcsicmp(lhs, rhs) == 0;
			#elif GTEST_OS_LINUX && !GTEST_OS_LINUX_ANDROID
			return wcscasecmp(lhs, rhs) == 0;
			#else
			// Android, Mac OS X and Cygwin don't define wcscasecmp.
			// Other unknown OSes may not define it either.
			wint_t left, right;
			do {
			left = towlower(*lhs++);
			right = towlower(*rhs++);
			} while (left && left == right);
			return left == right;
			#endif // OS selector
			}

			// Returns true iff str ends with the given suffix, ignoring case.
			// Any string is considered to end with an empty suffix.
			bool String::EndsWithCaseInsensitive(
			const std::string& str, const std::string& suffix) {
			const size_t str_len = str.length();
			const size_t suffix_len = suffix.length();
			return (str_len >= suffix_len) &&
			CaseInsensitiveCStringEquals(str.c_str() + str_len - suffix_len,
			suffix.c_str());
			}

			// Formats an int value as "%02d".
			std::string String::FormatIntWidth2(int value) {
			std::stringstream ss;
			ss << std::setfill('0') << std::setw(2) << value;
			return ss.str();
			}

			// Formats an int value as "%X".
			std::string String::FormatHexInt(int value) {
			std::stringstream ss;
			ss << std::hex << std::uppercase << value;
			return ss.str();
			}

			// Formats a byte as "%02X".
			std::string String::FormatByte(unsigned char value) {
			std::stringstream ss;
			ss << std::setfill('0') << std::setw(2) << std::hex << std::uppercase
			<< static_cast<unsigned int>(value);
			return ss.str();
			}

			// Converts the buffer in a stringstream to an std::string, converting NUL
			// bytes to "\\0" along the way.
			std::string StringStreamToString(::std::stringstream* ss) {
			const ::std::string& str = ss->str();
			const char* const start = str.c_str();
			const char* const end = start + str.length();

			std::string result;
			result.reserve(2 * (end - start));
			for (const char* ch = start; ch != end; ++ch) {
			if (*ch == '\0') {
			result += "\\0"; // Replaces NUL with "\\0";
			} else {
			result += *ch;
			}
			}

			return result;
			}

			// Appends the user-supplied message to the Google-Test-generated message.
			std::string AppendUserMessage(const std::string& gtest_msg,
			const Message& user_msg) {
			// Appends the user message if it's non-empty.
			const std::string user_msg_string = user_msg.GetString();
			if (user_msg_string.empty()) {
			return gtest_msg;
			}

			return gtest_msg + "\n" + user_msg_string;
			}

			} // namespace internal

			// class TestResult

			// Creates an empty TestResult.
			TestResult::TestResult()
			: death_test_count_(0),
			elapsed_time_(0) {
			}

			// D'tor.
			TestResult::~TestResult() {
			}

			// Returns the i-th test part result among all the results. i can
			// range from 0 to total_part_count() - 1. If i is not in that range,
			// aborts the program.
			const TestPartResult& TestResult::GetTestPartResult(int i) const {
			if (i < 0 \|\| i >= total_part_count())
			internal::posix::Abort();
			return test_part_results_.at(i);
			}

			// Returns the i-th test property. i can range from 0 to
			// test_property_count() - 1. If i is not in that range, aborts the
			// program.
			const TestProperty& TestResult::GetTestProperty(int i) const {
			if (i < 0 \|\| i >= test_property_count())
			internal::posix::Abort();
			return test_properties_.at(i);
			}

			// Clears the test part results.
			void TestResult::ClearTestPartResults() {
			test_part_results_.clear();
			}

			// Adds a test part result to the list.
			void TestResult::AddTestPartResult(const TestPartResult& test_part_result) {
			test_part_results_.push_back(test_part_result);
			}

			// Adds a test property to the list. If a property with the same key as the
			// supplied property is already represented, the value of this test_property
			// replaces the old value for that key.
			void TestResult::RecordProperty(const std::string& xml_element,
			const TestProperty& test_property) {
			if (!ValidateTestProperty(xml_element, test_property)) {
			return;
			}
			internal::MutexLock lock(&test_properites_mutex_);
			const std::vector<TestProperty>::iterator property_with_matching_key =
			std::find_if(test_properties_.begin(), test_properties_.end(),
			internal::TestPropertyKeyIs(test_property.key()));
			if (property_with_matching_key == test_properties_.end()) {
			test_properties_.push_back(test_property);
			return;
			}
			property_with_matching_key->SetValue(test_property.value());
			}

			// The list of reserved attributes used in the <testsuites> element of XML
			// output.
			static const char* const kReservedTestSuitesAttributes[] = {
			"disabled",
			"errors",
			"failures",
			"name",
			"random_seed",
			"tests",
			"time",
			"timestamp"
			};

			// The list of reserved attributes used in the <testsuite> element of XML
			// output.
			static const char* const kReservedTestSuiteAttributes[] = {
			"disabled",
			"errors",
			"failures",
			"name",
			"tests",
			"time"
			};

			// The list of reserved attributes used in the <testcase> element of XML output.
			static const char* const kReservedTestCaseAttributes[] = {
			"classname",
			"name",
			"status",
			"time",
			"type_param",
			"value_param"
			};

			template <int kSize>
			std::vector<std::string> ArrayAsVector(const char* const (&array)[kSize]) {
			return std::vector<std::string>(array, array + kSize);
			}

			static std::vector<std::string> GetReservedAttributesForElement(
			const std::string& xml_element) {
			if (xml_element == "testsuites") {
			return ArrayAsVector(kReservedTestSuitesAttributes);
			} else if (xml_element == "testsuite") {
			return ArrayAsVector(kReservedTestSuiteAttributes);
			} else if (xml_element == "testcase") {
			return ArrayAsVector(kReservedTestCaseAttributes);
			} else {
			GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
			}
			// This code is unreachable but some compilers may not realizes that.
			return std::vector<std::string>();
			}

			static std::string FormatWordList(const std::vector<std::string>& words) {
			Message word_list;
			for (size_t i = 0; i < words.size(); ++i) {
			if (i > 0 && words.size() > 2) {
			word_list << ", ";
			}
			if (i == words.size() - 1) {
			word_list << "and ";
			}
			word_list << "'" << words[i] << "'";
			}
			return word_list.GetString();
			}

			bool ValidateTestPropertyName(const std::string& property_name,
			const std::vector<std::string>& reserved_names) {
			if (std::find(reserved_names.begin(), reserved_names.end(), property_name) !=
			reserved_names.end()) {
			ADD_FAILURE() << "Reserved key used in RecordProperty(): " << property_name
			<< " (" << FormatWordList(reserved_names)
			<< " are reserved by " << GTEST_NAME_ << ")";
			return false;
			}
			return true;
			}

			// Adds a failure if the key is a reserved attribute of the element named
			// xml_element. Returns true if the property is valid.
			bool TestResult::ValidateTestProperty(const std::string& xml_element,
			const TestProperty& test_property) {
			return ValidateTestPropertyName(test_property.key(),
			GetReservedAttributesForElement(xml_element));
			}

			// Clears the object.
			void TestResult::Clear() {
			test_part_results_.clear();
			test_properties_.clear();
			death_test_count_ = 0;
			elapsed_time_ = 0;
			}

			// Returns true iff the test failed.
			bool TestResult::Failed() const {
			for (int i = 0; i < total_part_count(); ++i) {
			if (GetTestPartResult(i).failed())
			return true;
			}
			return false;
			}

			// Returns true iff the test part fatally failed.
			static bool TestPartFatallyFailed(const TestPartResult& result) {
			return result.fatally_failed();
			}

			// Returns true iff the test fatally failed.
			bool TestResult::HasFatalFailure() const {
			return CountIf(test_part_results_, TestPartFatallyFailed) > 0;
			}

			// Returns true iff the test part non-fatally failed.
			static bool TestPartNonfatallyFailed(const TestPartResult& result) {
			return result.nonfatally_failed();
			}

			// Returns true iff the test has a non-fatal failure.
			bool TestResult::HasNonfatalFailure() const {
			return CountIf(test_part_results_, TestPartNonfatallyFailed) > 0;
			}

			// Gets the number of all test parts. This is the sum of the number
			// of successful test parts and the number of failed test parts.
			int TestResult::total_part_count() const {
			return static_cast<int>(test_part_results_.size());
			}

			// Returns the number of the test properties.
			int TestResult::test_property_count() const {
			return static_cast<int>(test_properties_.size());
			}

			// class Test

			// Creates a Test object.

			// The c'tor saves the states of all flags.
			Test::Test()
			: gtest_flag_saver_(new GTEST_FLAG_SAVER_) {
			}

			// The d'tor restores the states of all flags. The actual work is
			// done by the d'tor of the gtest_flag_saver_ field, and thus not
			// visible here.
			Test::~Test() {
			}

			// Sets up the test fixture.
			//
			// A sub-class may override this.
			void Test::SetUp() {
			}

			// Tears down the test fixture.
			//
			// A sub-class may override this.
			void Test::TearDown() {
			}

			// Allows user supplied key value pairs to be recorded for later output.
			void Test::RecordProperty(const std::string& key, const std::string& value) {
			UnitTest::GetInstance()->RecordProperty(key, value);
			}

			// Allows user supplied key value pairs to be recorded for later output.
			void Test::RecordProperty(const std::string& key, int value) {
			Message value_message;
			value_message << value;
			RecordProperty(key, value_message.GetString().c_str());
			}

			namespace internal {

			void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
			const std::string& message) {
			// This function is a friend of UnitTest and as such has access to
			// AddTestPartResult.
			UnitTest::GetInstance()->AddTestPartResult(
			result_type,
			NULL, // No info about the source file where the exception occurred.
			-1, // We have no info on which line caused the exception.
			message,
			""); // No stack trace, either.
			}

			} // namespace internal

			// Google Test requires all tests in the same test case to use the same test
			// fixture class. This function checks if the current test has the
			// same fixture class as the first test in the current test case. If
			// yes, it returns true; otherwise it generates a Google Test failure and
			// returns false.
			bool Test::HasSameFixtureClass() {
			internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
			const TestCase* const test_case = impl->current_test_case();

			// Info about the first test in the current test case.
			const TestInfo* const first_test_info = test_case->test_info_list()[0];
			const internal::TypeId first_fixture_id = first_test_info->fixture_class_id_;
			const char* const first_test_name = first_test_info->name();

			// Info about the current test.
			const TestInfo* const this_test_info = impl->current_test_info();
			const internal::TypeId this_fixture_id = this_test_info->fixture_class_id_;
			const char* const this_test_name = this_test_info->name();

			if (this_fixture_id != first_fixture_id) {
			// Is the first test defined using TEST?
			const bool first_is_TEST = first_fixture_id == internal::GetTestTypeId();
			// Is this test defined using TEST?
			const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();

			if (first_is_TEST \|\| this_is_TEST) {
			// Both TEST and TEST_F appear in same test case, which is incorrect.
			// Tell the user how to fix this.

			// Gets the name of the TEST and the name of the TEST_F. Note
			// that first_is_TEST and this_is_TEST cannot both be true, as
			// the fixture IDs are different for the two tests.
			const char* const TEST_name =
			first_is_TEST ? first_test_name : this_test_name;
			const char* const TEST_F_name =
			first_is_TEST ? this_test_name : first_test_name;

			ADD_FAILURE()
			<< "All tests in the same test case must use the same test fixture\n"
			<< "class, so mixing TEST_F and TEST in the same test case is\n"
			<< "illegal. In test case " << this_test_info->test_case_name()
			<< ",\n"
			<< "test " << TEST_F_name << " is defined using TEST_F but\n"
			<< "test " << TEST_name << " is defined using TEST. You probably\n"
			<< "want to change the TEST to TEST_F or move it to another test\n"
			<< "case.";
			} else {
			// Two fixture classes with the same name appear in two different
			// namespaces, which is not allowed. Tell the user how to fix this.
			ADD_FAILURE()
			<< "All tests in the same test case must use the same test fixture\n"
			<< "class. However, in test case "
			<< this_test_info->test_case_name() << ",\n"
			<< "you defined test " << first_test_name
			<< " and test " << this_test_name << "\n"
			<< "using two different test fixture classes. This can happen if\n"
			<< "the two classes are from different namespaces or translation\n"
			<< "units and have the same name. You should probably rename one\n"
			<< "of the classes to put the tests into different test cases.";
			}
			return false;
			}

			return true;
			}

			#if GTEST_HAS_SEH

			// Adds an "exception thrown" fatal failure to the current test. This
			// function returns its result via an output parameter pointer because VC++
			// prohibits creation of objects with destructors on stack in functions
			// using __try (see error C2712).
			static std::string* FormatSehExceptionMessage(DWORD exception_code,
			const char* location) {
			Message message;
			message << "SEH exception with code 0x" << std::setbase(16) <<
			exception_code << std::setbase(10) << " thrown in " << location << ".";

			return new std::string(message.GetString());
			}

			#endif // GTEST_HAS_SEH

			namespace internal {

			#if GTEST_HAS_EXCEPTIONS

			// Adds an "exception thrown" fatal failure to the current test.
			static std::string FormatCxxExceptionMessage(const char* description,
			const char* location) {
			Message message;
			if (description != NULL) {
			message << "C++ exception with description \"" << description << "\"";
			} else {
			message << "Unknown C++ exception";
			}
			message << " thrown in " << location << ".";

			return message.GetString();
			}

			static std::string PrintTestPartResultToString(
			const TestPartResult& test_part_result);

			GoogleTestFailureException::GoogleTestFailureException(
			const TestPartResult& failure)
			: ::std::runtime_error(PrintTestPartResultToString(failure).c_str()) {}

			#endif // GTEST_HAS_EXCEPTIONS

			// We put these helper functions in the internal namespace as IBM's xlC
			// compiler rejects the code if they were declared static.

			// Runs the given method and handles SEH exceptions it throws, when
			// SEH is supported; returns the 0-value for type Result in case of an
			// SEH exception. (Microsoft compilers cannot handle SEH and C++
			// exceptions in the same function. Therefore, we provide a separate
			// wrapper function for handling SEH exceptions.)
			template <class T, typename Result>
			Result HandleSehExceptionsInMethodIfSupported(
			T* object, Result (T::method)(), const char location) {
			#if GTEST_HAS_SEH
			__try {
			return (object->*method)();
			} __except (internal::UnitTestOptions::GTestShouldProcessSEH( // NOLINT
			GetExceptionCode())) {
			// We create the exception message on the heap because VC++ prohibits
			// creation of objects with destructors on stack in functions using __try
			// (see error C2712).
			std::string* exception_message = FormatSehExceptionMessage(
			GetExceptionCode(), location);
			internal::ReportFailureInUnknownLocation(TestPartResult::kFatalFailure,
			*exception_message);
			delete exception_message;
			return static_cast<Result>(0);
			}
			#else
			(void)location;
			return (object->*method)();
			#endif // GTEST_HAS_SEH
			}

			// Runs the given method and catches and reports C++ and/or SEH-style
			// exceptions, if they are supported; returns the 0-value for type
			// Result in case of an SEH exception.
			template <class T, typename Result>
			Result HandleExceptionsInMethodIfSupported(
			T* object, Result (T::method)(), const char location) {
			// NOTE: The user code can affect the way in which Google Test handles
			// exceptions by setting GTEST_FLAG(catch_exceptions), but only before
			// RUN_ALL_TESTS() starts. It is technically possible to check the flag
			// after the exception is caught and either report or re-throw the
			// exception based on the flag's value:
			//
			// try {
			// // Perform the test method.
			// } catch (...) {
			// if (GTEST_FLAG(catch_exceptions))
			// // Report the exception as failure.
			// else
			// throw; // Re-throws the original exception.
			// }
			//
			// However, the purpose of this flag is to allow the program to drop into
			// the debugger when the exception is thrown. On most platforms, once the
			// control enters the catch block, the exception origin information is
			// lost and the debugger will stop the program at the point of the
			// re-throw in this function -- instead of at the point of the original
			// throw statement in the code under test. For this reason, we perform
			// the check early, sacrificing the ability to affect Google Test's
			// exception handling in the method where the exception is thrown.
			if (internal::GetUnitTestImpl()->catch_exceptions()) {
			#if GTEST_HAS_EXCEPTIONS
			try {
			return HandleSehExceptionsInMethodIfSupported(object, method, location);
			} catch (const internal::GoogleTestFailureException&) { // NOLINT
			// This exception type can only be thrown by a failed Google
			// Test assertion with the intention of letting another testing
			// framework catch it. Therefore we just re-throw it.
			throw;
			} catch (const std::exception& e) { // NOLINT
			internal::ReportFailureInUnknownLocation(
			TestPartResult::kFatalFailure,
			FormatCxxExceptionMessage(e.what(), location));
			} catch (...) { // NOLINT
			internal::ReportFailureInUnknownLocation(
			TestPartResult::kFatalFailure,
			FormatCxxExceptionMessage(NULL, location));
			}
			return static_cast<Result>(0);
			#else
			return HandleSehExceptionsInMethodIfSupported(object, method, location);
			#endif // GTEST_HAS_EXCEPTIONS
			} else {
			return (object->*method)();
			}
			}

			} // namespace internal

			// Runs the test and updates the test result.
			void Test::Run() {
			if (!HasSameFixtureClass()) return;

			internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
			impl->os_stack_trace_getter()->UponLeavingGTest();
			internal::HandleExceptionsInMethodIfSupported(this, &Test::SetUp, "SetUp()");
			// We will run the test only if SetUp() was successful.
			if (!HasFatalFailure()) {
			impl->os_stack_trace_getter()->UponLeavingGTest();
			internal::HandleExceptionsInMethodIfSupported(
			this, &Test::TestBody, "the test body");
			}

			// However, we want to clean up as much as possible. Hence we will
			// always call TearDown(), even if SetUp() or the test body has
			// failed.
			impl->os_stack_trace_getter()->UponLeavingGTest();
			internal::HandleExceptionsInMethodIfSupported(
			this, &Test::TearDown, "TearDown()");
			}

			// Returns true iff the current test has a fatal failure.
			bool Test::HasFatalFailure() {
			return internal::GetUnitTestImpl()->current_test_result()->HasFatalFailure();
			}

			// Returns true iff the current test has a non-fatal failure.
			bool Test::HasNonfatalFailure() {
			return internal::GetUnitTestImpl()->current_test_result()->
			HasNonfatalFailure();
			}

			// class TestInfo

			// Constructs a TestInfo object. It assumes ownership of the test factory
			// object.
			TestInfo::TestInfo(const std::string& a_test_case_name,
			const std::string& a_name,
			const char* a_type_param,
			const char* a_value_param,
			internal::CodeLocation a_code_location,
			internal::TypeId fixture_class_id,
			internal::TestFactoryBase* factory)
			: test_case_name_(a_test_case_name),
			name_(a_name),
			type_param_(a_type_param ? new std::string(a_type_param) : NULL),
			value_param_(a_value_param ? new std::string(a_value_param) : NULL),
			location_(a_code_location),
			fixture_class_id_(fixture_class_id),
			should_run_(false),
			is_disabled_(false),
			matches_filter_(false),
			factory_(factory),
			result_() {}

			// Destructs a TestInfo object.
			TestInfo::~TestInfo() { delete factory_; }

			namespace internal {

			// Creates a new TestInfo object and registers it with Google Test;
			// returns the created object.
			//
			// Arguments:
			//
			// test_case_name: name of the test case
			// name: name of the test
			// type_param: the name of the test's type parameter, or NULL if
			// this is not a typed or a type-parameterized test.
			// value_param: text representation of the test's value parameter,
			// or NULL if this is not a value-parameterized test.
			// code_location: code location where the test is defined
			// fixture_class_id: ID of the test fixture class
			// set_up_tc: pointer to the function that sets up the test case
			// tear_down_tc: pointer to the function that tears down the test case
			// factory: pointer to the factory that creates a test object.
			// The newly created TestInfo instance will assume
			// ownership of the factory object.
			TestInfo* MakeAndRegisterTestInfo(
			const char* test_case_name,
			const char* name,
			const char* type_param,
			const char* value_param,
			CodeLocation code_location,
			TypeId fixture_class_id,
			SetUpTestCaseFunc set_up_tc,
			TearDownTestCaseFunc tear_down_tc,
			TestFactoryBase* factory) {
			TestInfo* const test_info =
			new TestInfo(test_case_name, name, type_param, value_param,
			code_location, fixture_class_id, factory);
			GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
			return test_info;
			}

			#if GTEST_HAS_PARAM_TEST
			void ReportInvalidTestCaseType(const char* test_case_name,
			CodeLocation code_location) {
			Message errors;
			errors
			<< "Attempted redefinition of test case " << test_case_name << ".\n"
			<< "All tests in the same test case must use the same test fixture\n"
			<< "class. However, in test case " << test_case_name << ", you tried\n"
			<< "to define a test using a fixture class different from the one\n"
			<< "used earlier. This can happen if the two fixture classes are\n"
			<< "from different namespaces and have the same name. You should\n"
			<< "probably rename one of the classes to put the tests into different\n"
			<< "test cases.";

			GTEST_LOG_(ERROR)
			<< FormatFileLocation(code_location.file.c_str(),
			code_location.line)
			<< " " << errors.GetString();
			}
			#endif // GTEST_HAS_PARAM_TEST

			} // namespace internal

			namespace {

			// A predicate that checks the test name of a TestInfo against a known
			// value.
			//
			// This is used for implementation of the TestCase class only. We put
			// it in the anonymous namespace to prevent polluting the outer
			// namespace.
			//
			// TestNameIs is copyable.
			class TestNameIs {
			public:
			// Constructor.
			//
			// TestNameIs has NO default constructor.
			explicit TestNameIs(const char* name)
			: name_(name) {}

			// Returns true iff the test name of test_info matches name_.
			bool operator()(const TestInfo * test_info) const {
			return test_info && test_info->name() == name_;
			}

			private:
			std::string name_;
			};

			} // namespace

			namespace internal {

			// This method expands all parameterized tests registered with macros TEST_P
			// and INSTANTIATE_TEST_CASE_P into regular tests and registers those.
			// This will be done just once during the program runtime.
			void UnitTestImpl::RegisterParameterizedTests() {
			#if GTEST_HAS_PARAM_TEST
			if (!parameterized_tests_registered_) {
			parameterized_test_registry_.RegisterTests();
			parameterized_tests_registered_ = true;
			}
			#endif
			}

			} // namespace internal

			// Creates the test object, runs it, records its result, and then
			// deletes it.
			void TestInfo::Run() {
			if (!should_run_) return;

			// Tells UnitTest where to store test result.
			internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
			impl->set_current_test_info(this);

			TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();

			// Notifies the unit test event listeners that a test is about to start.
			repeater->OnTestStart(*this);

			const TimeInMillis start = internal::GetTimeInMillis();

			impl->os_stack_trace_getter()->UponLeavingGTest();

			// Creates the test object.
			Test* const test = internal::HandleExceptionsInMethodIfSupported(
			factory_, &internal::TestFactoryBase::CreateTest,
			"the test fixture's constructor");

			// Runs the test only if the test object was created and its
			// constructor didn't generate a fatal failure.
			if ((test != NULL) && !Test::HasFatalFailure()) {
			// This doesn't throw as all user code that can throw are wrapped into
			// exception handling code.
			test->Run();
			}

			// Deletes the test object.
			impl->os_stack_trace_getter()->UponLeavingGTest();
			internal::HandleExceptionsInMethodIfSupported(
			test, &Test::DeleteSelf_, "the test fixture's destructor");

			result_.set_elapsed_time(internal::GetTimeInMillis() - start);

			// Notifies the unit test event listener that a test has just finished.
			repeater->OnTestEnd(*this);

			// Tells UnitTest to stop associating assertion results to this
			// test.
			impl->set_current_test_info(NULL);
			}

			// class TestCase

			// Gets the number of successful tests in this test case.
			int TestCase::successful_test_count() const {
			return CountIf(test_info_list_, TestPassed);
			}

			// Gets the number of failed tests in this test case.
			int TestCase::failed_test_count() const {
			return CountIf(test_info_list_, TestFailed);
			}

			// Gets the number of disabled tests that will be reported in the XML report.
			int TestCase::reportable_disabled_test_count() const {
			return CountIf(test_info_list_, TestReportableDisabled);
			}

			// Gets the number of disabled tests in this test case.
			int TestCase::disabled_test_count() const {
			return CountIf(test_info_list_, TestDisabled);
			}

			// Gets the number of tests to be printed in the XML report.
			int TestCase::reportable_test_count() const {
			return CountIf(test_info_list_, TestReportable);
			}

			// Get the number of tests in this test case that should run.
			int TestCase::test_to_run_count() const {
			return CountIf(test_info_list_, ShouldRunTest);
			}

			// Gets the number of all tests.
			int TestCase::total_test_count() const {
			return static_cast<int>(test_info_list_.size());
			}

			// Creates a TestCase with the given name.
			//
			// Arguments:
			//
			// name: name of the test case
			// a_type_param: the name of the test case's type parameter, or NULL if
			// this is not a typed or a type-parameterized test case.
			// set_up_tc: pointer to the function that sets up the test case
			// tear_down_tc: pointer to the function that tears down the test case
			TestCase::TestCase(const char* a_name, const char* a_type_param,
			Test::SetUpTestCaseFunc set_up_tc,
			Test::TearDownTestCaseFunc tear_down_tc)
			: name_(a_name),
			type_param_(a_type_param ? new std::string(a_type_param) : NULL),
			set_up_tc_(set_up_tc),
			tear_down_tc_(tear_down_tc),
			should_run_(false),
			elapsed_time_(0) {
			}

			// Destructor of TestCase.
			TestCase::~TestCase() {
			// Deletes every Test in the collection.
			ForEach(test_info_list_, internal::Delete<TestInfo>);
			}

			// Returns the i-th test among all the tests. i can range from 0 to
			// total_test_count() - 1. If i is not in that range, returns NULL.
			const TestInfo* TestCase::GetTestInfo(int i) const {
			const int index = GetElementOr(test_indices_, i, -1);
			return index < 0 ? NULL : test_info_list_[index];
			}

			// Returns the i-th test among all the tests. i can range from 0 to
			// total_test_count() - 1. If i is not in that range, returns NULL.
			TestInfo* TestCase::GetMutableTestInfo(int i) {
			const int index = GetElementOr(test_indices_, i, -1);
			return index < 0 ? NULL : test_info_list_[index];
			}

			// Adds a test to this test case. Will delete the test upon
			// destruction of the TestCase object.
			void TestCase::AddTestInfo(TestInfo * test_info) {
			test_info_list_.push_back(test_info);
			test_indices_.push_back(static_cast<int>(test_indices_.size()));
			}

			// Runs every test in this TestCase.
			void TestCase::Run() {
			if (!should_run_) return;

			internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
			impl->set_current_test_case(this);

			TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();

			repeater->OnTestCaseStart(*this);
			impl->os_stack_trace_getter()->UponLeavingGTest();
			internal::HandleExceptionsInMethodIfSupported(
			this, &TestCase::RunSetUpTestCase, "SetUpTestCase()");

			const internal::TimeInMillis start = internal::GetTimeInMillis();
			for (int i = 0; i < total_test_count(); i++) {
			GetMutableTestInfo(i)->Run();
			}
			elapsed_time_ = internal::GetTimeInMillis() - start;

			impl->os_stack_trace_getter()->UponLeavingGTest();
			internal::HandleExceptionsInMethodIfSupported(
			this, &TestCase::RunTearDownTestCase, "TearDownTestCase()");

			repeater->OnTestCaseEnd(*this);
			impl->set_current_test_case(NULL);
			}

			// Clears the results of all tests in this test case.
			void TestCase::ClearResult() {
			ad_hoc_test_result_.Clear();
			ForEach(test_info_list_, TestInfo::ClearTestResult);
			}

			// Shuffles the tests in this test case.
			void TestCase::ShuffleTests(internal::Random* random) {
			Shuffle(random, &test_indices_);
			}

			// Restores the test order to before the first shuffle.
			void TestCase::UnshuffleTests() {
			for (size_t i = 0; i < test_indices_.size(); i++) {
			test_indices_[i] = static_cast<int>(i);
			}
			}

			// Formats a countable noun. Depending on its quantity, either the
			// singular form or the plural form is used. e.g.
			//
			// FormatCountableNoun(1, "formula", "formuli") returns "1 formula".
			// FormatCountableNoun(5, "book", "books") returns "5 books".
			static std::string FormatCountableNoun(int count,
			const char * singular_form,
			const char * plural_form) {
			return internal::StreamableToString(count) + " " +
			(count == 1 ? singular_form : plural_form);
			}

			// Formats the count of tests.
			static std::string FormatTestCount(int test_count) {
			return FormatCountableNoun(test_count, "test", "tests");
			}

			// Formats the count of test cases.
			static std::string FormatTestCaseCount(int test_case_count) {
			return FormatCountableNoun(test_case_count, "test case", "test cases");
			}

			// Converts a TestPartResult::Type enum to human-friendly string
			// representation. Both kNonFatalFailure and kFatalFailure are translated
			// to "Failure", as the user usually doesn't care about the difference
			// between the two when viewing the test result.
			static const char * TestPartResultTypeToString(TestPartResult::Type type) {
			switch (type) {
			case TestPartResult::kSuccess:
			return "Success";

			case TestPartResult::kNonFatalFailure:
			case TestPartResult::kFatalFailure:
			#ifdef _MSC_VER
			return "error: ";
			#else
			return "Failure\n";
			#endif
			default:
			return "Unknown result type";
			}
			}

			namespace internal {

			// Prints a TestPartResult to an std::string.
			static std::string PrintTestPartResultToString(
			const TestPartResult& test_part_result) {
			return (Message()
			<< internal::FormatFileLocation(test_part_result.file_name(),
			test_part_result.line_number())
			<< " " << TestPartResultTypeToString(test_part_result.type())
			<< test_part_result.message()).GetString();
			}

			// Prints a TestPartResult.
			static void PrintTestPartResult(const TestPartResult& test_part_result) {
			const std::string& result =
			PrintTestPartResultToString(test_part_result);
			printf("%s\n", result.c_str());
			fflush(stdout);
			// If the test program runs in Visual Studio or a debugger, the
			// following statements add the test part result message to the Output
			// window such that the user can double-click on it to jump to the
			// corresponding source code location; otherwise they do nothing.
			#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
			// We don't call OutputDebugString*() on Windows Mobile, as printing
			// to stdout is done by OutputDebugString() there already - we don't
			// want the same message printed twice.
			::OutputDebugStringA(result.c_str());
			::OutputDebugStringA("\n");
			#endif
			}

			// class PrettyUnitTestResultPrinter

			enum GTestColor {
			COLOR_DEFAULT,
			COLOR_RED,
			COLOR_GREEN,
			COLOR_YELLOW
			};

			#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
			!GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT

			// Returns the character attribute for the given color.
			WORD GetColorAttribute(GTestColor color) {
			switch (color) {
			case COLOR_RED: return FOREGROUND_RED;
			case COLOR_GREEN: return FOREGROUND_GREEN;
			case COLOR_YELLOW: return FOREGROUND_RED \| FOREGROUND_GREEN;
			default: return 0;
			}
			}

			int GetBitOffset(WORD color_mask) {
			if (color_mask == 0) return 0;

			int bitOffset = 0;
			while((color_mask & 1) == 0) {
			color_mask >>= 1;
			++bitOffset;
			}
			return bitOffset;
			}

			WORD GetNewColor(GTestColor color, WORD old_color_attrs) {
			// Let's reuse the BG
			static const WORD background_mask = BACKGROUND_BLUE \| BACKGROUND_GREEN \| BACKGROUND_RED \| BACKGROUND_INTENSITY;
			static const WORD foreground_mask = FOREGROUND_BLUE \| FOREGROUND_GREEN \| FOREGROUND_RED \| FOREGROUND_INTENSITY;
			const WORD existing_bg = old_color_attrs & background_mask;

			WORD new_color = GetColorAttribute(color) \| existing_bg \| FOREGROUND_INTENSITY;
			static const int bg_bitOffset = GetBitOffset(background_mask);
			static const int fg_bitOffset = GetBitOffset(foreground_mask);

			if (((new_color & background_mask) >> bg_bitOffset) == ((new_color & foreground_mask) >> fg_bitOffset)) {
			new_color ^= FOREGROUND_INTENSITY; //invert intensity
			}
			return new_color;
			}

			#else

			// Returns the ANSI color code for the given color. COLOR_DEFAULT is
			// an invalid input.
			const char* GetAnsiColorCode(GTestColor color) {
			switch (color) {
			case COLOR_RED: return "1";
			case COLOR_GREEN: return "2";
			case COLOR_YELLOW: return "3";
			default: return NULL;
			};
			}

			#endif // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE

			// Returns true iff Google Test should use colors in the output.
			bool ShouldUseColor(bool stdout_is_tty) {
			const char* const gtest_color = GTEST_FLAG(color).c_str();

			if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
			#if GTEST_OS_WINDOWS
			// On Windows the TERM variable is usually not set, but the
			// console there does support colors.
			return stdout_is_tty;
			#else
			// On non-Windows platforms, we rely on the TERM variable.
			const char* const term = posix::GetEnv("TERM");
			const bool term_supports_color =
			String::CStringEquals(term, "xterm") \|\|
			String::CStringEquals(term, "xterm-color") \|\|
			String::CStringEquals(term, "xterm-256color") \|\|
			String::CStringEquals(term, "screen") \|\|
			String::CStringEquals(term, "screen-256color") \|\|
			String::CStringEquals(term, "tmux") \|\|
			String::CStringEquals(term, "tmux-256color") \|\|
			String::CStringEquals(term, "rxvt-unicode") \|\|
			String::CStringEquals(term, "rxvt-unicode-256color") \|\|
			String::CStringEquals(term, "linux") \|\|
			String::CStringEquals(term, "cygwin");
			return stdout_is_tty && term_supports_color;
			#endif // GTEST_OS_WINDOWS
			}

			return String::CaseInsensitiveCStringEquals(gtest_color, "yes") \|\|
			String::CaseInsensitiveCStringEquals(gtest_color, "true") \|\|
			String::CaseInsensitiveCStringEquals(gtest_color, "t") \|\|
			String::CStringEquals(gtest_color, "1");
			// We take "yes", "true", "t", and "1" as meaning "yes". If the
			// value is neither one of these nor "auto", we treat it as "no" to
			// be conservative.
			}

			// Helpers for printing colored strings to stdout. Note that on Windows, we
			// cannot simply emit special characters and have the terminal change colors.
			// This routine must actually emit the characters rather than return a string
			// that would be colored when printed, as can be done on Linux.
			GTEST_ATTRIBUTE_PRINTF_(2, 3)
			void ColoredPrintf(GTestColor color, const char* fmt, ...) {
			va_list args;
			va_start(args, fmt);

			#if GTEST_OS_WINDOWS_MOBILE \|\| GTEST_OS_SYMBIAN \|\| GTEST_OS_ZOS \|\| \
			GTEST_OS_IOS \|\| GTEST_OS_WINDOWS_PHONE \|\| GTEST_OS_WINDOWS_RT
			const bool use_color = AlwaysFalse();
			#else
			static const bool in_color_mode =
			ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
			const bool use_color = in_color_mode && (color != COLOR_DEFAULT);
			#endif // GTEST_OS_WINDOWS_MOBILE \|\| GTEST_OS_SYMBIAN \|\| GTEST_OS_ZOS
			// The '!= 0' comparison is necessary to satisfy MSVC 7.1.

			if (!use_color) {
			vprintf(fmt, args);
			va_end(args);
			return;
			}

			#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
			!GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
			const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);

			// Gets the current text color.
			CONSOLE_SCREEN_BUFFER_INFO buffer_info;
			GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
			const WORD old_color_attrs = buffer_info.wAttributes;
			const WORD new_color = GetNewColor(color, old_color_attrs);

			// We need to flush the stream buffers into the console before each
			// SetConsoleTextAttribute call lest it affect the text that is already
			// printed but has not yet reached the console.
			fflush(stdout);
			SetConsoleTextAttribute(stdout_handle, new_color);

			vprintf(fmt, args);

			fflush(stdout);
			// Restores the text color.
			SetConsoleTextAttribute(stdout_handle, old_color_attrs);
			#else
			printf("\033[0;3%sm", GetAnsiColorCode(color));
			vprintf(fmt, args);
			printf("\033[m"); // Resets the terminal to default.
			#endif // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
			va_end(args);
			}

			// Text printed in Google Test's text output and --gunit_list_tests
			// output to label the type parameter and value parameter for a test.
			static const char kTypeParamLabel[] = "TypeParam";
			static const char kValueParamLabel[] = "GetParam()";

			void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
			const char* const type_param = test_info.type_param();
			const char* const value_param = test_info.value_param();

			if (type_param != NULL \|\| value_param != NULL) {
			printf(", where ");
			if (type_param != NULL) {
			printf("%s = %s", kTypeParamLabel, type_param);
			if (value_param != NULL)
			printf(" and ");
			}
			if (value_param != NULL) {
			printf("%s = %s", kValueParamLabel, value_param);
			}
			}
			}

			// This class implements the TestEventListener interface.
			//
			// Class PrettyUnitTestResultPrinter is copyable.
			class PrettyUnitTestResultPrinter : public TestEventListener {
			public:
			PrettyUnitTestResultPrinter() {}
			static void PrintTestName(const char * test_case, const char * test) {
			printf("%s.%s", test_case, test);
			}

			// The following methods override what's in the TestEventListener class.
			virtual void OnTestProgramStart(const UnitTest& /unit_test/) {}
			virtual void OnTestIterationStart(const UnitTest& unit_test, int iteration);
			virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test);
			virtual void OnEnvironmentsSetUpEnd(const UnitTest& /unit_test/) {}
			virtual void OnTestCaseStart(const TestCase& test_case);
			virtual void OnTestStart(const TestInfo& test_info);
			virtual void OnTestPartResult(const TestPartResult& result);
			virtual void OnTestEnd(const TestInfo& test_info);
			virtual void OnTestCaseEnd(const TestCase& test_case);
			virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test);
			virtual void OnEnvironmentsTearDownEnd(const UnitTest& /unit_test/) {}
			virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);
			virtual void OnTestProgramEnd(const UnitTest& /unit_test/) {}

			private:
			static void PrintFailedTests(const UnitTest& unit_test);
			};

			// Fired before each iteration of tests starts.
			void PrettyUnitTestResultPrinter::OnTestIterationStart(
			const UnitTest& unit_test, int iteration) {
			if (GTEST_FLAG(repeat) != 1)
			printf("\nRepeating all tests (iteration %d) . . .\n\n", iteration + 1);

			const char* const filter = GTEST_FLAG(filter).c_str();

			// Prints the filter if it's not *. This reminds the user that some
			// tests may be skipped.
			if (!String::CStringEquals(filter, kUniversalFilter)) {
			ColoredPrintf(COLOR_YELLOW,
			"Note: %s filter = %s\n", GTEST_NAME_, filter);
			}

			if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
			const Int32 shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
			ColoredPrintf(COLOR_YELLOW,
			"Note: This is test shard %d of %s.\n",
			static_cast<int>(shard_index) + 1,
			internal::posix::GetEnv(kTestTotalShards));
			}

			if (GTEST_FLAG(shuffle)) {
			ColoredPrintf(COLOR_YELLOW,
			"Note: Randomizing tests' orders with a seed of %d .\n",
			unit_test.random_seed());
			}

			ColoredPrintf(COLOR_GREEN, "[==========] ");
			printf("Running %s from %s.\n",
			FormatTestCount(unit_test.test_to_run_count()).c_str(),
			FormatTestCaseCount(unit_test.test_case_to_run_count()).c_str());
			fflush(stdout);
			}

			void PrettyUnitTestResultPrinter::OnEnvironmentsSetUpStart(
			const UnitTest& /unit_test/) {
			ColoredPrintf(COLOR_GREEN, "[----------] ");
			printf("Global test environment set-up.\n");
			fflush(stdout);
			}

			void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
			const std::string counts =
			FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
			ColoredPrintf(COLOR_GREEN, "[----------] ");
			printf("%s from %s", counts.c_str(), test_case.name());
			if (test_case.type_param() == NULL) {
			printf("\n");
			} else {
			printf(", where %s = %s\n", kTypeParamLabel, test_case.type_param());
			}
			fflush(stdout);
			}

			void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
			ColoredPrintf(COLOR_GREEN, "[ RUN ] ");
			PrintTestName(test_info.test_case_name(), test_info.name());
			printf("\n");
			fflush(stdout);
			}

			// Called after an assertion failure.
			void PrettyUnitTestResultPrinter::OnTestPartResult(
			const TestPartResult& result) {
			// If the test part succeeded, we don't need to do anything.
			if (result.type() == TestPartResult::kSuccess)
			return;

			// Print failure message from the assertion (e.g. expected this and got that).
			PrintTestPartResult(result);
			fflush(stdout);
			}

			void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
			if (test_info.result()->Passed()) {
			ColoredPrintf(COLOR_GREEN, "[ OK ] ");
			} else {
			ColoredPrintf(COLOR_RED, "[ FAILED ] ");
			}
			PrintTestName(test_info.test_case_name(), test_info.name());
			if (test_info.result()->Failed())
			PrintFullTestCommentIfPresent(test_info);

			if (GTEST_FLAG(print_time)) {
			printf(" (%s ms)\n", internal::StreamableToString(
			test_info.result()->elapsed_time()).c_str());
			} else {
			printf("\n");
			}
			fflush(stdout);
			}

			void PrettyUnitTestResultPrinter::OnTestCaseEnd(const TestCase& test_case) {
			if (!GTEST_FLAG(print_time)) return;

			const std::string counts =
			FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
			ColoredPrintf(COLOR_GREEN, "[----------] ");
			printf("%s from %s (%s ms total)\n\n",
			counts.c_str(), test_case.name(),
			internal::StreamableToString(test_case.elapsed_time()).c_str());
			fflush(stdout);
			}

			void PrettyUnitTestResultPrinter::OnEnvironmentsTearDownStart(
			const UnitTest& /unit_test/) {
			ColoredPrintf(COLOR_GREEN, "[----------] ");
			printf("Global test environment tear-down\n");
			fflush(stdout);
			}

			// Internal helper for printing the list of failed tests.
			void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
			const int failed_test_count = unit_test.failed_test_count();
			if (failed_test_count == 0) {
			return;
			}

			for (int i = 0; i < unit_test.total_test_case_count(); ++i) {
			const TestCase& test_case = *unit_test.GetTestCase(i);
			if (!test_case.should_run() \|\| (test_case.failed_test_count() == 0)) {
			continue;
			}
			for (int j = 0; j < test_case.total_test_count(); ++j) {
			const TestInfo& test_info = *test_case.GetTestInfo(j);
			if (!test_info.should_run() \|\| test_info.result()->Passed()) {
			continue;
			}
			ColoredPrintf(COLOR_RED, "[ FAILED ] ");
			printf("%s.%s", test_case.name(), test_info.name());
			PrintFullTestCommentIfPresent(test_info);
			printf("\n");
			}
			}
			}

			void PrettyUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
			int /iteration/) {
			ColoredPrintf(COLOR_GREEN, "[==========] ");
			printf("%s from %s ran.",
			FormatTestCount(unit_test.test_to_run_count()).c_str(),
			FormatTestCaseCount(unit_test.test_case_to_run_count()).c_str());
			if (GTEST_FLAG(print_time)) {
			printf(" (%s ms total)",
			internal::StreamableToString(unit_test.elapsed_time()).c_str());
			}
			printf("\n");
			ColoredPrintf(COLOR_GREEN, "[ PASSED ] ");
			printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());

			int num_failures = unit_test.failed_test_count();
			if (!unit_test.Passed()) {
			const int failed_test_count = unit_test.failed_test_count();
			ColoredPrintf(COLOR_RED, "[ FAILED ] ");
			printf("%s, listed below:\n", FormatTestCount(failed_test_count).c_str());
			PrintFailedTests(unit_test);
			printf("\n%2d FAILED %s\n", num_failures,
			num_failures == 1 ? "TEST" : "TESTS");
			}

			int num_disabled = unit_test.reportable_disabled_test_count();
			if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
			if (!num_failures) {
			printf("\n"); // Add a spacer if no FAILURE banner is displayed.
			}
			ColoredPrintf(COLOR_YELLOW,
			" YOU HAVE %d DISABLED %s\n\n",
			num_disabled,
			num_disabled == 1 ? "TEST" : "TESTS");
			}
			// Ensure that Google Test output is printed before, e.g., heapchecker output.
			fflush(stdout);
			}

			// End PrettyUnitTestResultPrinter

			// class TestEventRepeater
			//
			// This class forwards events to other event listeners.
			class TestEventRepeater : public TestEventListener {
			public:
			TestEventRepeater() : forwarding_enabled_(true) {}
			virtual ~TestEventRepeater();
			void Append(TestEventListener *listener);
			TestEventListener* Release(TestEventListener* listener);

			// Controls whether events will be forwarded to listeners_. Set to false
			// in death test child processes.
			bool forwarding_enabled() const { return forwarding_enabled_; }
			void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }

			virtual void OnTestProgramStart(const UnitTest& unit_test);
			virtual void OnTestIterationStart(const UnitTest& unit_test, int iteration);
			virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test);
			virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test);
			virtual void OnTestCaseStart(const TestCase& test_case);
			virtual void OnTestStart(const TestInfo& test_info);
			virtual void OnTestPartResult(const TestPartResult& result);
			virtual void OnTestEnd(const TestInfo& test_info);
			virtual void OnTestCaseEnd(const TestCase& test_case);
			virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test);
			virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test);
			virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);
			virtual void OnTestProgramEnd(const UnitTest& unit_test);

			private:
			// Controls whether events will be forwarded to listeners_. Set to false
			// in death test child processes.
			bool forwarding_enabled_;
			// The list of listeners that receive events.
			std::vector<TestEventListener*> listeners_;

			GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventRepeater);
			};

			TestEventRepeater::~TestEventRepeater() {
			ForEach(listeners_, Delete<TestEventListener>);
			}

			void TestEventRepeater::Append(TestEventListener *listener) {
			listeners_.push_back(listener);
			}

			// TODO(vladl@google.com): Factor the search functionality into Vector::Find.
			TestEventListener* TestEventRepeater::Release(TestEventListener *listener) {
			for (size_t i = 0; i < listeners_.size(); ++i) {
			if (listeners_[i] == listener) {
			listeners_.erase(listeners_.begin() + i);
			return listener;
			}
			}

			return NULL;
			}

			// Since most methods are very similar, use macros to reduce boilerplate.
			// This defines a member that forwards the call to all listeners.
			#define GTEST_REPEATER_METHOD_(Name, Type) \
			void TestEventRepeater::Name(const Type& parameter) { \
			if (forwarding_enabled_) { \
			for (size_t i = 0; i < listeners_.size(); i++) { \
			listeners_[i]->Name(parameter); \
			} \
			} \
			}
			// This defines a member that forwards the call to all listeners in reverse
			// order.
			#define GTEST_REVERSE_REPEATER_METHOD_(Name, Type) \
			void TestEventRepeater::Name(const Type& parameter) { \
			if (forwarding_enabled_) { \
			for (int i = static_cast<int>(listeners_.size()) - 1; i >= 0; i--) { \
			listeners_[i]->Name(parameter); \
			} \
			} \
			}

			GTEST_REPEATER_METHOD_(OnTestProgramStart, UnitTest)
			GTEST_REPEATER_METHOD_(OnEnvironmentsSetUpStart, UnitTest)
			GTEST_REPEATER_METHOD_(OnTestCaseStart, TestCase)
			GTEST_REPEATER_METHOD_(OnTestStart, TestInfo)
			GTEST_REPEATER_METHOD_(OnTestPartResult, TestPartResult)
			GTEST_REPEATER_METHOD_(OnEnvironmentsTearDownStart, UnitTest)
			GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsSetUpEnd, UnitTest)
			GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsTearDownEnd, UnitTest)
			GTEST_REVERSE_REPEATER_METHOD_(OnTestEnd, TestInfo)
			GTEST_REVERSE_REPEATER_METHOD_(OnTestCaseEnd, TestCase)
			GTEST_REVERSE_REPEATER_METHOD_(OnTestProgramEnd, UnitTest)

			#undef GTEST_REPEATER_METHOD_
			#undef GTEST_REVERSE_REPEATER_METHOD_

			void TestEventRepeater::OnTestIterationStart(const UnitTest& unit_test,
			int iteration) {
			if (forwarding_enabled_) {
			for (size_t i = 0; i < listeners_.size(); i++) {
			listeners_[i]->OnTestIterationStart(unit_test, iteration);
			}
			}
			}

			void TestEventRepeater::OnTestIterationEnd(const UnitTest& unit_test,
			int iteration) {
			if (forwarding_enabled_) {
			for (int i = static_cast<int>(listeners_.size()) - 1; i >= 0; i--) {
			listeners_[i]->OnTestIterationEnd(unit_test, iteration);
			}
			}
			}

			// End TestEventRepeater

			// This class generates an XML output file.
			class XmlUnitTestResultPrinter : public EmptyTestEventListener {
			public:
			explicit XmlUnitTestResultPrinter(const char* output_file);

			virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);

			private:
			// Is c a whitespace character that is normalized to a space character
			// when it appears in an XML attribute value?
			static bool IsNormalizableWhitespace(char c) {
			return c == 0x9 \|\| c == 0xA \|\| c == 0xD;
			}

			// May c appear in a well-formed XML document?
			static bool IsValidXmlCharacter(char c) {
			return IsNormalizableWhitespace(c) \|\| c >= 0x20;
			}

			// Returns an XML-escaped copy of the input string str. If
			// is_attribute is true, the text is meant to appear as an attribute
			// value, and normalizable whitespace is preserved by replacing it
			// with character references.
			static std::string EscapeXml(const std::string& str, bool is_attribute);

			// Returns the given string with all characters invalid in XML removed.
			static std::string RemoveInvalidXmlCharacters(const std::string& str);

			// Convenience wrapper around EscapeXml when str is an attribute value.
			static std::string EscapeXmlAttribute(const std::string& str) {
			return EscapeXml(str, true);
			}

			// Convenience wrapper around EscapeXml when str is not an attribute value.
			static std::string EscapeXmlText(const char* str) {
			return EscapeXml(str, false);
			}

			// Verifies that the given attribute belongs to the given element and
			// streams the attribute as XML.
			static void OutputXmlAttribute(std::ostream* stream,
			const std::string& element_name,
			const std::string& name,
			const std::string& value);

			// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
			static void OutputXmlCDataSection(::std::ostream* stream, const char* data);

			// Streams an XML representation of a TestInfo object.
			static void OutputXmlTestInfo(::std::ostream* stream,
			const char* test_case_name,
			const TestInfo& test_info);

			// Prints an XML representation of a TestCase object
			static void PrintXmlTestCase(::std::ostream* stream,
			const TestCase& test_case);

			// Prints an XML summary of unit_test to output stream out.
			static void PrintXmlUnitTest(::std::ostream* stream,
			const UnitTest& unit_test);

			// Produces a string representing the test properties in a result as space
			// delimited XML attributes based on the property key="value" pairs.
			// When the std::string is not empty, it includes a space at the beginning,
			// to delimit this attribute from prior attributes.
			static std::string TestPropertiesAsXmlAttributes(const TestResult& result);

			// The output file.
			const std::string output_file_;

			GTEST_DISALLOW_COPY_AND_ASSIGN_(XmlUnitTestResultPrinter);
			};

			// Creates a new XmlUnitTestResultPrinter.
			XmlUnitTestResultPrinter::XmlUnitTestResultPrinter(const char* output_file)
			: output_file_(output_file) {
			if (output_file_.c_str() == NULL \|\| output_file_.empty()) {
			GTEST_LOG_(FATAL) << "XML output file may not be null";
			}
			}

			// Called after the unit test ends.
			void XmlUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
			int /iteration/) {
			FILE* xmlout = NULL;
			FilePath output_file(output_file_);
			FilePath output_dir(output_file.RemoveFileName());

			if (output_dir.CreateDirectoriesRecursively()) {
			xmlout = posix::FOpen(output_file_.c_str(), "w");
			}
			if (xmlout == NULL) {
			// TODO(wan): report the reason of the failure.
			//
			// We don't do it for now as:
			//
			// 1. There is no urgent need for it.
			// 2. It's a bit involved to make the errno variable thread-safe on
			// all three operating systems (Linux, Windows, and Mac OS).
			// 3. To interpret the meaning of errno in a thread-safe way,
			// we need the strerror_r() function, which is not available on
			// Windows.
			GTEST_LOG_(FATAL) << "Unable to open file \""
			<< output_file_ << "\"";
			}
			std::stringstream stream;
			PrintXmlUnitTest(&stream, unit_test);
			fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
			fclose(xmlout);
			}

			// Returns an XML-escaped copy of the input string str. If is_attribute
			// is true, the text is meant to appear as an attribute value, and
			// normalizable whitespace is preserved by replacing it with character
			// references.
			//
			// Invalid XML characters in str, if any, are stripped from the output.
			// It is expected that most, if not all, of the text processed by this
			// module will consist of ordinary English text.
			// If this module is ever modified to produce version 1.1 XML output,
			// most invalid characters can be retained using character references.
			// TODO(wan): It might be nice to have a minimally invasive, human-readable
			// escaping scheme for invalid characters, rather than dropping them.
			std::string XmlUnitTestResultPrinter::EscapeXml(
			const std::string& str, bool is_attribute) {
			Message m;

			for (size_t i = 0; i < str.size(); ++i) {
			const char ch = str[i];
			switch (ch) {
			case '<':
			m << "<";
			break;
			case '>':
			m << ">";
			break;
			case '&':
			m << "&";
			break;
			case '\'':
			if (is_attribute)
			m << "'";
			else
			m << '\'';
			break;
			case '"':
			if (is_attribute)
			m << """;
			else
			m << '"';
			break;
			default:
			if (IsValidXmlCharacter(ch)) {
			if (is_attribute && IsNormalizableWhitespace(ch))
			m << "&#x" << String::FormatByte(static_cast<unsigned char>(ch))
			<< ";";
			else
			m << ch;
			}
			break;
			}
			}

			return m.GetString();
			}

			// Returns the given string with all characters invalid in XML removed.
			// Currently invalid characters are dropped from the string. An
			// alternative is to replace them with certain characters such as . or ?.
			std::string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(
			const std::string& str) {
			std::string output;
			output.reserve(str.size());
			for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
			if (IsValidXmlCharacter(*it))
			output.push_back(*it);

			return output;
			}

			// The following routines generate an XML representation of a UnitTest
			// object.
			//
			// This is how Google Test concepts map to the DTD:
			//
			// <testsuites name="AllTests"> <-- corresponds to a UnitTest object
			// <testsuite name="testcase-name"> <-- corresponds to a TestCase object
			// <testcase name="test-name"> <-- corresponds to a TestInfo object
			// <failure message="...">...</failure>
			// <failure message="...">...</failure>
			// <failure message="...">...</failure>
			// <-- individual assertion failures
			// </testcase>
			// </testsuite>
			// </testsuites>

			// Formats the given time in milliseconds as seconds.
			std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
			::std::stringstream ss;
			ss << (static_cast<double>(ms) * 1e-3);
			return ss.str();
			}

			static bool PortableLocaltime(time_t seconds, struct tm* out) {
			#if defined(_MSC_VER)
			return localtime_s(out, &seconds) == 0;
			#elif defined(__MINGW32__) \|\| defined(__MINGW64__)
			// MINGW <time.h> provides neither localtime_r nor localtime_s, but uses
			// Windows' localtime(), which has a thread-local tm buffer.
			struct tm* tm_ptr = localtime(&seconds); // NOLINT
			if (tm_ptr == NULL)
			return false;
			out = tm_ptr;
			return true;
			#else
			return localtime_r(&seconds, out) != NULL;
			#endif
			}

			// Converts the given epoch time in milliseconds to a date string in the ISO
			// 8601 format, without the timezone information.
			std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
			struct tm time_struct;
			if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
			return "";
			// YYYY-MM-DDThh:mm:ss
			return StreamableToString(time_struct.tm_year + 1900) + "-" +
			String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
			String::FormatIntWidth2(time_struct.tm_mday) + "T" +
			String::FormatIntWidth2(time_struct.tm_hour) + ":" +
			String::FormatIntWidth2(time_struct.tm_min) + ":" +
			String::FormatIntWidth2(time_struct.tm_sec);
			}

			// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
			void XmlUnitTestResultPrinter::OutputXmlCDataSection(::std::ostream* stream,
			const char* data) {
			const char* segment = data;
			*stream << "<![CDATA[";
			for (;;) {
			const char* const next_segment = strstr(segment, "]]>");
			if (next_segment != NULL) {
			stream->write(
			segment, static_cast<std::streamsize>(next_segment - segment));
			*stream << "]]>]]><![CDATA[";
			segment = next_segment + strlen("]]>");
			} else {
			*stream << segment;
			break;
			}
			}
			*stream << "]]>";
			}

			void XmlUnitTestResultPrinter::OutputXmlAttribute(
			std::ostream* stream,
			const std::string& element_name,
			const std::string& name,
			const std::string& value) {
			const std::vector<std::string>& allowed_names =
			GetReservedAttributesForElement(element_name);

			GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
			allowed_names.end())
			<< "Attribute " << name << " is not allowed for element <" << element_name
			<< ">.";

			*stream << " " << name << "=\"" << EscapeXmlAttribute(value) << "\"";
			}

			// Prints an XML representation of a TestInfo object.
			// TODO(wan): There is also value in printing properties with the plain printer.
			void XmlUnitTestResultPrinter::OutputXmlTestInfo(::std::ostream* stream,
			const char* test_case_name,
			const TestInfo& test_info) {
			const TestResult& result = *test_info.result();
			const std::string kTestcase = "testcase";

			*stream << " <testcase";
			OutputXmlAttribute(stream, kTestcase, "name", test_info.name());

			if (test_info.value_param() != NULL) {
			OutputXmlAttribute(stream, kTestcase, "value_param",
			test_info.value_param());
			}
			if (test_info.type_param() != NULL) {
			OutputXmlAttribute(stream, kTestcase, "type_param", test_info.type_param());
			}

			OutputXmlAttribute(stream, kTestcase, "status",
			test_info.should_run() ? "run" : "notrun");
			OutputXmlAttribute(stream, kTestcase, "time",
			FormatTimeInMillisAsSeconds(result.elapsed_time()));
			OutputXmlAttribute(stream, kTestcase, "classname", test_case_name);
			*stream << TestPropertiesAsXmlAttributes(result);

			int failures = 0;
			for (int i = 0; i < result.total_part_count(); ++i) {
			const TestPartResult& part = result.GetTestPartResult(i);
			if (part.failed()) {
			if (++failures == 1) {
			*stream << ">\n";
			}
			const std::string location =
			internal::FormatCompilerIndependentFileLocation(part.file_name(),
			part.line_number());
			const std::string summary = location + "\n" + part.summary();
			*stream << " <failure message=\""
			<< EscapeXmlAttribute(summary.c_str())
			<< "\" type=\"\">";
			const std::string detail = location + "\n" + part.message();
			OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
			*stream << "</failure>\n";
			}
			}

			if (failures == 0)
			*stream << " />\n";
			else
			*stream << " </testcase>\n";
			}

			// Prints an XML representation of a TestCase object
			void XmlUnitTestResultPrinter::PrintXmlTestCase(std::ostream* stream,
			const TestCase& test_case) {
			const std::string kTestsuite = "testsuite";
			*stream << " <" << kTestsuite;
			OutputXmlAttribute(stream, kTestsuite, "name", test_case.name());
			OutputXmlAttribute(stream, kTestsuite, "tests",
			StreamableToString(test_case.reportable_test_count()));
			OutputXmlAttribute(stream, kTestsuite, "failures",
			StreamableToString(test_case.failed_test_count()));
			OutputXmlAttribute(
			stream, kTestsuite, "disabled",
			StreamableToString(test_case.reportable_disabled_test_count()));
			OutputXmlAttribute(stream, kTestsuite, "errors", "0");
			OutputXmlAttribute(stream, kTestsuite, "time",
			FormatTimeInMillisAsSeconds(test_case.elapsed_time()));
			*stream << TestPropertiesAsXmlAttributes(test_case.ad_hoc_test_result())
			<< ">\n";

			for (int i = 0; i < test_case.total_test_count(); ++i) {
			if (test_case.GetTestInfo(i)->is_reportable())
			OutputXmlTestInfo(stream, test_case.name(), *test_case.GetTestInfo(i));
			}
			*stream << " </" << kTestsuite << ">\n";
			}

			// Prints an XML summary of unit_test to output stream out.
			void XmlUnitTestResultPrinter::PrintXmlUnitTest(std::ostream* stream,
			const UnitTest& unit_test) {
			const std::string kTestsuites = "testsuites";

			*stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
			*stream << "<" << kTestsuites;

			OutputXmlAttribute(stream, kTestsuites, "tests",
			StreamableToString(unit_test.reportable_test_count()));
			OutputXmlAttribute(stream, kTestsuites, "failures",
			StreamableToString(unit_test.failed_test_count()));
			OutputXmlAttribute(
			stream, kTestsuites, "disabled",
			StreamableToString(unit_test.reportable_disabled_test_count()));
			OutputXmlAttribute(stream, kTestsuites, "errors", "0");
			OutputXmlAttribute(
			stream, kTestsuites, "timestamp",
			FormatEpochTimeInMillisAsIso8601(unit_test.start_timestamp()));
			OutputXmlAttribute(stream, kTestsuites, "time",
			FormatTimeInMillisAsSeconds(unit_test.elapsed_time()));

			if (GTEST_FLAG(shuffle)) {
			OutputXmlAttribute(stream, kTestsuites, "random_seed",
			StreamableToString(unit_test.random_seed()));
			}

			*stream << TestPropertiesAsXmlAttributes(unit_test.ad_hoc_test_result());

			OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
			*stream << ">\n";

			for (int i = 0; i < unit_test.total_test_case_count(); ++i) {
			if (unit_test.GetTestCase(i)->reportable_test_count() > 0)
			PrintXmlTestCase(stream, *unit_test.GetTestCase(i));
			}
			*stream << "</" << kTestsuites << ">\n";
			}

			// Produces a string representing the test properties in a result as space
			// delimited XML attributes based on the property key="value" pairs.
			std::string XmlUnitTestResultPrinter::TestPropertiesAsXmlAttributes(
			const TestResult& result) {
			Message attributes;
			for (int i = 0; i < result.test_property_count(); ++i) {
			const TestProperty& property = result.GetTestProperty(i);
			attributes << " " << property.key() << "="
			<< "\"" << EscapeXmlAttribute(property.value()) << "\"";
			}
			return attributes.GetString();
			}

			// End XmlUnitTestResultPrinter

			#if GTEST_CAN_STREAM_RESULTS_

			// Checks if str contains '=', '&', '%' or '\n' characters. If yes,
			// replaces them by "%xx" where xx is their hexadecimal value. For
			// example, replaces "=" with "%3D". This algorithm is O(strlen(str))
			// in both time and space -- important as the input str may contain an
			// arbitrarily long test failure message and stack trace.
			std::string StreamingListener::UrlEncode(const char* str) {
			std::string result;
			result.reserve(strlen(str) + 1);
			for (char ch = str; ch != '\0'; ch = ++str) {
			switch (ch) {
			case '%':
			case '=':
			case '&':
			case '\n':
			result.append("%" + String::FormatByte(static_cast<unsigned char>(ch)));
			break;
			default:
			result.push_back(ch);
			break;
			}
			}
			return result;
			}

			void StreamingListener::SocketWriter::MakeConnection() {
			GTEST_CHECK_(sockfd_ == -1)
			<< "MakeConnection() can't be called when there is already a connection.";

			addrinfo hints;
			memset(&hints, 0, sizeof(hints));
			hints.ai_family = AF_UNSPEC; // To allow both IPv4 and IPv6 addresses.
			hints.ai_socktype = SOCK_STREAM;
			addrinfo* servinfo = NULL;

			// Use the getaddrinfo() to get a linked list of IP addresses for
			// the given host name.
			const int error_num = getaddrinfo(
			host_name_.c_str(), port_num_.c_str(), &hints, &servinfo);
			if (error_num != 0) {
			GTEST_LOG_(WARNING) << "stream_result_to: getaddrinfo() failed: "
			<< gai_strerror(error_num);
			}

			// Loop through all the results and connect to the first we can.
			for (addrinfo* cur_addr = servinfo; sockfd_ == -1 && cur_addr != NULL;
			cur_addr = cur_addr->ai_next) {
			sockfd_ = socket(
			cur_addr->ai_family, cur_addr->ai_socktype, cur_addr->ai_protocol);
			if (sockfd_ != -1) {
			// Connect the client socket to the server socket.
			if (connect(sockfd_, cur_addr->ai_addr, cur_addr->ai_addrlen) == -1) {
			close(sockfd_);
			sockfd_ = -1;
			}
			}
			}

			freeaddrinfo(servinfo); // all done with this structure

			if (sockfd_ == -1) {
			GTEST_LOG_(WARNING) << "stream_result_to: failed to connect to "
			<< host_name_ << ":" << port_num_;
			}
			}

			// End of class Streaming Listener
			#endif // GTEST_CAN_STREAM_RESULTS__

			// Class ScopedTrace

			// Pushes the given source file location and message onto a per-thread
			// trace stack maintained by Google Test.
			ScopedTrace::ScopedTrace(const char* file, int line, const Message& message)
			GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
			TraceInfo trace;
			trace.file = file;
			trace.line = line;
			trace.message = message.GetString();

			UnitTest::GetInstance()->PushGTestTrace(trace);
			}

			// Pops the info pushed by the c'tor.
			ScopedTrace::~ScopedTrace()
			GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
			UnitTest::GetInstance()->PopGTestTrace();
			}


			// class OsStackTraceGetter

			const char* const OsStackTraceGetterInterface::kElidedFramesMarker =
			"... " GTEST_NAME_ " internal frames ...";

			std::string OsStackTraceGetter::CurrentStackTrace(int /max_depth/,
			int /skip_count/) {
			return "";
			}

			void OsStackTraceGetter::UponLeavingGTest() {}

			// A helper class that creates the premature-exit file in its
			// constructor and deletes the file in its destructor.
			class ScopedPrematureExitFile {
			public:
			explicit ScopedPrematureExitFile(const char* premature_exit_filepath)
			: premature_exit_filepath_(premature_exit_filepath) {
			// If a path to the premature-exit file is specified...
			if (premature_exit_filepath != NULL && *premature_exit_filepath != '\0') {
			// create the file with a single "0" character in it. I/O
			// errors are ignored as there's nothing better we can do and we
			// don't want to fail the test because of this.
			FILE* pfile = posix::FOpen(premature_exit_filepath, "w");
			fwrite("0", 1, 1, pfile);
			fclose(pfile);
			}
			}

			~ScopedPrematureExitFile() {
			if (premature_exit_filepath_ != NULL && *premature_exit_filepath_ != '\0') {
			remove(premature_exit_filepath_);
			}
			}

			private:
			const char* const premature_exit_filepath_;

			GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedPrematureExitFile);
			};

			} // namespace internal

			// class TestEventListeners

			TestEventListeners::TestEventListeners()
			: repeater_(new internal::TestEventRepeater()),
			default_result_printer_(NULL),
			default_xml_generator_(NULL) {
			}

			TestEventListeners::~TestEventListeners() { delete repeater_; }

			// Returns the standard listener responsible for the default console
			// output. Can be removed from the listeners list to shut down default
			// console output. Note that removing this object from the listener list
			// with Release transfers its ownership to the user.
			void TestEventListeners::Append(TestEventListener* listener) {
			repeater_->Append(listener);
			}

			// Removes the given event listener from the list and returns it. It then
			// becomes the caller's responsibility to delete the listener. Returns
			// NULL if the listener is not found in the list.
			TestEventListener* TestEventListeners::Release(TestEventListener* listener) {
			if (listener == default_result_printer_)
			default_result_printer_ = NULL;
			else if (listener == default_xml_generator_)
			default_xml_generator_ = NULL;
			return repeater_->Release(listener);
			}

			// Returns repeater that broadcasts the TestEventListener events to all
			// subscribers.
			TestEventListener* TestEventListeners::repeater() { return repeater_; }

			// Sets the default_result_printer attribute to the provided listener.
			// The listener is also added to the listener list and previous
			// default_result_printer is removed from it and deleted. The listener can
			// also be NULL in which case it will not be added to the list. Does
			// nothing if the previous and the current listener objects are the same.
			void TestEventListeners::SetDefaultResultPrinter(TestEventListener* listener) {
			if (default_result_printer_ != listener) {
			// It is an error to pass this method a listener that is already in the
			// list.
			delete Release(default_result_printer_);
			default_result_printer_ = listener;
			if (listener != NULL)
			Append(listener);
			}
			}

			// Sets the default_xml_generator attribute to the provided listener. The
			// listener is also added to the listener list and previous
			// default_xml_generator is removed from it and deleted. The listener can
			// also be NULL in which case it will not be added to the list. Does
			// nothing if the previous and the current listener objects are the same.
			void TestEventListeners::SetDefaultXmlGenerator(TestEventListener* listener) {
			if (default_xml_generator_ != listener) {
			// It is an error to pass this method a listener that is already in the
			// list.
			delete Release(default_xml_generator_);
			default_xml_generator_ = listener;
			if (listener != NULL)
			Append(listener);
			}
			}

			// Controls whether events will be forwarded by the repeater to the
			// listeners in the list.
			bool TestEventListeners::EventForwardingEnabled() const {
			return repeater_->forwarding_enabled();
			}

			void TestEventListeners::SuppressEventForwarding() {
			repeater_->set_forwarding_enabled(false);
			}

			// class UnitTest

			// Gets the singleton UnitTest object. The first time this method is
			// called, a UnitTest object is constructed and returned. Consecutive
			// calls will return the same object.
			//
			// We don't protect this under mutex_ as a user is not supposed to
			// call this before main() starts, from which point on the return
			// value will never change.
			UnitTest* UnitTest::GetInstance() {
			// When compiled with MSVC 7.1 in optimized mode, destroying the
			// UnitTest object upon exiting the program messes up the exit code,
			// causing successful tests to appear failed. We have to use a
			// different implementation in this case to bypass the compiler bug.
			// This implementation makes the compiler happy, at the cost of
			// leaking the UnitTest object.

			// CodeGear C++Builder insists on a public destructor for the
			// default implementation. Use this implementation to keep good OO
			// design with private destructor.

			#if (_MSC_VER == 1310 && !defined(_DEBUG)) \|\| defined(__BORLANDC__)
			static UnitTest* const instance = new UnitTest;
			return instance;
			#else
			static UnitTest instance;
			return &instance;
			#endif // (_MSC_VER == 1310 && !defined(_DEBUG)) \|\| defined(__BORLANDC__)
			}

			// Gets the number of successful test cases.
			int UnitTest::successful_test_case_count() const {
			return impl()->successful_test_case_count();
			}

			// Gets the number of failed test cases.
			int UnitTest::failed_test_case_count() const {
			return impl()->failed_test_case_count();
			}

			// Gets the number of all test cases.
			int UnitTest::total_test_case_count() const {
			return impl()->total_test_case_count();
			}

			// Gets the number of all test cases that contain at least one test
			// that should run.
			int UnitTest::test_case_to_run_count() const {
			return impl()->test_case_to_run_count();
			}

			// Gets the number of successful tests.
			int UnitTest::successful_test_count() const {
			return impl()->successful_test_count();
			}

			// Gets the number of failed tests.
			int UnitTest::failed_test_count() const { return impl()->failed_test_count(); }

			// Gets the number of disabled tests that will be reported in the XML report.
			int UnitTest::reportable_disabled_test_count() const {
			return impl()->reportable_disabled_test_count();
			}

			// Gets the number of disabled tests.
			int UnitTest::disabled_test_count() const {
			return impl()->disabled_test_count();
			}

			// Gets the number of tests to be printed in the XML report.
			int UnitTest::reportable_test_count() const {
			return impl()->reportable_test_count();
			}

			// Gets the number of all tests.
			int UnitTest::total_test_count() const { return impl()->total_test_count(); }

			// Gets the number of tests that should run.
			int UnitTest::test_to_run_count() const { return impl()->test_to_run_count(); }

			// Gets the time of the test program start, in ms from the start of the
			// UNIX epoch.
			internal::TimeInMillis UnitTest::start_timestamp() const {
			return impl()->start_timestamp();
			}

			// Gets the elapsed time, in milliseconds.
			internal::TimeInMillis UnitTest::elapsed_time() const {
			return impl()->elapsed_time();
			}

			// Returns true iff the unit test passed (i.e. all test cases passed).
			bool UnitTest::Passed() const { return impl()->Passed(); }

			// Returns true iff the unit test failed (i.e. some test case failed
			// or something outside of all tests failed).
			bool UnitTest::Failed() const { return impl()->Failed(); }

			// Gets the i-th test case among all the test cases. i can range from 0 to
			// total_test_case_count() - 1. If i is not in that range, returns NULL.
			const TestCase* UnitTest::GetTestCase(int i) const {
			return impl()->GetTestCase(i);
			}

			// Returns the TestResult containing information on test failures and
			// properties logged outside of individual test cases.
			const TestResult& UnitTest::ad_hoc_test_result() const {
			return *impl()->ad_hoc_test_result();
			}

			// Gets the i-th test case among all the test cases. i can range from 0 to
			// total_test_case_count() - 1. If i is not in that range, returns NULL.
			TestCase* UnitTest::GetMutableTestCase(int i) {
			return impl()->GetMutableTestCase(i);
			}

			// Returns the list of event listeners that can be used to track events
			// inside Google Test.
			TestEventListeners& UnitTest::listeners() {
			return *impl()->listeners();
			}

			// Registers and returns a global test environment. When a test
			// program is run, all global test environments will be set-up in the
			// order they were registered. After all tests in the program have
			// finished, all global test environments will be torn-down in the
			// reverse order they were registered.
			//
			// The UnitTest object takes ownership of the given environment.
			//
			// We don't protect this under mutex_, as we only support calling it
			// from the main thread.
			Environment* UnitTest::AddEnvironment(Environment* env) {
			if (env == NULL) {
			return NULL;
			}

			impl_->environments().push_back(env);
			return env;
			}

			// Adds a TestPartResult to the current TestResult object. All Google Test
			// assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
			// this to report their results. The user code should use the
			// assertion macros instead of calling this directly.
			void UnitTest::AddTestPartResult(
			TestPartResult::Type result_type,
			const char* file_name,
			int line_number,
			const std::string& message,
			const std::string& os_stack_trace) GTEST_LOCK_EXCLUDED_(mutex_) {
			Message msg;
			msg << message;

			internal::MutexLock lock(&mutex_);
			if (impl_->gtest_trace_stack().size() > 0) {
			msg << "\n" << GTEST_NAME_ << " trace:";

			for (int i = static_cast<int>(impl_->gtest_trace_stack().size());
			i > 0; --i) {
			const internal::TraceInfo& trace = impl_->gtest_trace_stack()[i - 1];
			msg << "\n" << internal::FormatFileLocation(trace.file, trace.line)
			<< " " << trace.message;
			}
			}

			if (os_stack_trace.c_str() != NULL && !os_stack_trace.empty()) {
			msg << internal::kStackTraceMarker << os_stack_trace;
			}

			const TestPartResult result =
			TestPartResult(result_type, file_name, line_number,
			msg.GetString().c_str());
			impl_->GetTestPartResultReporterForCurrentThread()->
			ReportTestPartResult(result);

			if (result_type != TestPartResult::kSuccess) {
			// gtest_break_on_failure takes precedence over
			// gtest_throw_on_failure. This allows a user to set the latter
			// in the code (perhaps in order to use Google Test assertions
			// with another testing framework) and specify the former on the
			// command line for debugging.
			if (GTEST_FLAG(break_on_failure)) {
			#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
			// Using DebugBreak on Windows allows gtest to still break into a debugger
			// when a failure happens and both the --gtest_break_on_failure and
			// the --gtest_catch_exceptions flags are specified.
			DebugBreak();
			#else
			// Dereference NULL through a volatile pointer to prevent the compiler
			// from removing. We use this rather than abort() or __builtin_trap() for
			// portability: Symbian doesn't implement abort() well, and some debuggers
			// don't correctly trap abort().
			static_cast<volatile int>(NULL) = 1;
			#endif // GTEST_OS_WINDOWS
			} else if (GTEST_FLAG(throw_on_failure)) {
			#if GTEST_HAS_EXCEPTIONS
			throw internal::GoogleTestFailureException(result);
			#else
			// We cannot call abort() as it generates a pop-up in debug mode
			// that cannot be suppressed in VC 7.1 or below.
			exit(1);
			#endif
			}
			}
			}

			// Adds a TestProperty to the current TestResult object when invoked from
			// inside a test, to current TestCase's ad_hoc_test_result_ when invoked
			// from SetUpTestCase or TearDownTestCase, or to the global property set
			// when invoked elsewhere. If the result already contains a property with
			// the same key, the value will be updated.
			void UnitTest::RecordProperty(const std::string& key,
			const std::string& value) {
			impl_->RecordProperty(TestProperty(key, value));
			}

			// Runs all tests in this UnitTest object and prints the result.
			// Returns 0 if successful, or 1 otherwise.
			//
			// We don't protect this under mutex_, as we only support calling it
			// from the main thread.
			int UnitTest::Run() {
			const bool in_death_test_child_process =
			internal::GTEST_FLAG(internal_run_death_test).length() > 0;

			// Google Test implements this protocol for catching that a test
			// program exits before returning control to Google Test:
			//
			// 1. Upon start, Google Test creates a file whose absolute path
			// is specified by the environment variable
			// TEST_PREMATURE_EXIT_FILE.
			// 2. When Google Test has finished its work, it deletes the file.
			//
			// This allows a test runner to set TEST_PREMATURE_EXIT_FILE before
			// running a Google-Test-based test program and check the existence
			// of the file at the end of the test execution to see if it has
			// exited prematurely.

			// If we are in the child process of a death test, don't
			// create/delete the premature exit file, as doing so is unnecessary
			// and will confuse the parent process. Otherwise, create/delete
			// the file upon entering/leaving this function. If the program
			// somehow exits before this function has a chance to return, the
			// premature-exit file will be left undeleted, causing a test runner
			// that understands the premature-exit-file protocol to report the
			// test as having failed.
			const internal::ScopedPrematureExitFile premature_exit_file(
			in_death_test_child_process ?
			NULL : internal::posix::GetEnv("TEST_PREMATURE_EXIT_FILE"));

			// Captures the value of GTEST_FLAG(catch_exceptions). This value will be
			// used for the duration of the program.
			impl()->set_catch_exceptions(GTEST_FLAG(catch_exceptions));

			#if GTEST_HAS_SEH
			// Either the user wants Google Test to catch exceptions thrown by the
			// tests or this is executing in the context of death test child
			// process. In either case the user does not want to see pop-up dialogs
			// about crashes - they are expected.
			if (impl()->catch_exceptions() \|\| in_death_test_child_process) {
			# if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
			// SetErrorMode doesn't exist on CE.
			SetErrorMode(SEM_FAILCRITICALERRORS \| SEM_NOALIGNMENTFAULTEXCEPT \|
			SEM_NOGPFAULTERRORBOX \| SEM_NOOPENFILEERRORBOX);
			# endif // !GTEST_OS_WINDOWS_MOBILE

			# if (defined(_MSC_VER) \|\| GTEST_OS_WINDOWS_MINGW) && !GTEST_OS_WINDOWS_MOBILE
			// Death test children can be terminated with _abort(). On Windows,
			// _abort() can show a dialog with a warning message. This forces the
			// abort message to go to stderr instead.
			_set_error_mode(_OUT_TO_STDERR);
			# endif

			# if _MSC_VER >= 1400 && !GTEST_OS_WINDOWS_MOBILE
			// In the debug version, Visual Studio pops up a separate dialog
			// offering a choice to debug the aborted program. We need to suppress
			// this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
			// executed. Google Test will notify the user of any unexpected
			// failure via stderr.
			//
			// VC++ doesn't define _set_abort_behavior() prior to the version 8.0.
			// Users of prior VC versions shall suffer the agony and pain of
			// clicking through the countless debug dialogs.
			// TODO(vladl@google.com): find a way to suppress the abort dialog() in the
			// debug mode when compiled with VC 7.1 or lower.
			if (!GTEST_FLAG(break_on_failure))
			_set_abort_behavior(
			0x0, // Clear the following flags:
			_WRITE_ABORT_MSG \| _CALL_REPORTFAULT); // pop-up window, core dump.
			# endif
			}
			#endif // GTEST_HAS_SEH

			return internal::HandleExceptionsInMethodIfSupported(
			impl(),
			&internal::UnitTestImpl::RunAllTests,
			"auxiliary test code (environments or event listeners)") ? 0 : 1;
			}

			// Returns the working directory when the first TEST() or TEST_F() was
			// executed.
			const char* UnitTest::original_working_dir() const {
			return impl_->original_working_dir_.c_str();
			}

			// Returns the TestCase object for the test that's currently running,
			// or NULL if no test is running.
			const TestCase* UnitTest::current_test_case() const
			GTEST_LOCK_EXCLUDED_(mutex_) {
			internal::MutexLock lock(&mutex_);
			return impl_->current_test_case();
			}

			// Returns the TestInfo object for the test that's currently running,
			// or NULL if no test is running.
			const TestInfo* UnitTest::current_test_info() const
			GTEST_LOCK_EXCLUDED_(mutex_) {
			internal::MutexLock lock(&mutex_);
			return impl_->current_test_info();
			}

			// Returns the random seed used at the start of the current test run.
			int UnitTest::random_seed() const { return impl_->random_seed(); }

			#if GTEST_HAS_PARAM_TEST
			// Returns ParameterizedTestCaseRegistry object used to keep track of
			// value-parameterized tests and instantiate and register them.
			internal::ParameterizedTestCaseRegistry&
			UnitTest::parameterized_test_registry()
			GTEST_LOCK_EXCLUDED_(mutex_) {
			return impl_->parameterized_test_registry();
			}
			#endif // GTEST_HAS_PARAM_TEST

			// Creates an empty UnitTest.
			UnitTest::UnitTest() {
			impl_ = new internal::UnitTestImpl(this);
			}

			// Destructor of UnitTest.
			UnitTest::~UnitTest() {
			delete impl_;
			}

			// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
			// Google Test trace stack.
			void UnitTest::PushGTestTrace(const internal::TraceInfo& trace)
			GTEST_LOCK_EXCLUDED_(mutex_) {
			internal::MutexLock lock(&mutex_);
			impl_->gtest_trace_stack().push_back(trace);
			}

			// Pops a trace from the per-thread Google Test trace stack.
			void UnitTest::PopGTestTrace()
			GTEST_LOCK_EXCLUDED_(mutex_) {
			internal::MutexLock lock(&mutex_);
			impl_->gtest_trace_stack().pop_back();
			}

			namespace internal {

			UnitTestImpl::UnitTestImpl(UnitTest* parent)
			: parent_(parent),
			GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355 /* using this in initializer */)
			default_global_test_part_result_reporter_(this),
			default_per_thread_test_part_result_reporter_(this),
			GTEST_DISABLE_MSC_WARNINGS_POP_()
			global_test_part_result_repoter_(
			&default_global_test_part_result_reporter_),
			per_thread_test_part_result_reporter_(
			&default_per_thread_test_part_result_reporter_),
			#if GTEST_HAS_PARAM_TEST
			parameterized_test_registry_(),
			parameterized_tests_registered_(false),
			#endif // GTEST_HAS_PARAM_TEST
			last_death_test_case_(-1),
			current_test_case_(NULL),
			current_test_info_(NULL),
			ad_hoc_test_result_(),
			os_stack_trace_getter_(NULL),
			post_flag_parse_init_performed_(false),
			random_seed_(0), // Will be overridden by the flag before first use.
			random_(0), // Will be reseeded before first use.
			start_timestamp_(0),
			elapsed_time_(0),
			#if GTEST_HAS_DEATH_TEST
			death_test_factory_(new DefaultDeathTestFactory),
			#endif
			// Will be overridden by the flag before first use.
			catch_exceptions_(false) {
			listeners()->SetDefaultResultPrinter(new PrettyUnitTestResultPrinter);
			}

			UnitTestImpl::~UnitTestImpl() {
			// Deletes every TestCase.
			ForEach(test_cases_, internal::Delete<TestCase>);

			// Deletes every Environment.
			ForEach(environments_, internal::Delete<Environment>);

			delete os_stack_trace_getter_;
			}

			// Adds a TestProperty to the current TestResult object when invoked in a
			// context of a test, to current test case's ad_hoc_test_result when invoke
			// from SetUpTestCase/TearDownTestCase, or to the global property set
			// otherwise. If the result already contains a property with the same key,
			// the value will be updated.
			void UnitTestImpl::RecordProperty(const TestProperty& test_property) {
			std::string xml_element;
			TestResult* test_result; // TestResult appropriate for property recording.

			if (current_test_info_ != NULL) {
			xml_element = "testcase";
			test_result = &(current_test_info_->result_);
			} else if (current_test_case_ != NULL) {
			xml_element = "testsuite";
			test_result = &(current_test_case_->ad_hoc_test_result_);
			} else {
			xml_element = "testsuites";
			test_result = &ad_hoc_test_result_;
			}
			test_result->RecordProperty(xml_element, test_property);
			}

			#if GTEST_HAS_DEATH_TEST
			// Disables event forwarding if the control is currently in a death test
			// subprocess. Must not be called before InitGoogleTest.
			void UnitTestImpl::SuppressTestEventsIfInSubprocess() {
			if (internal_run_death_test_flag_.get() != NULL)
			listeners()->SuppressEventForwarding();
			}
			#endif // GTEST_HAS_DEATH_TEST

			// Initializes event listeners performing XML output as specified by
			// UnitTestOptions. Must not be called before InitGoogleTest.
			void UnitTestImpl::ConfigureXmlOutput() {
			const std::string& output_format = UnitTestOptions::GetOutputFormat();
			if (output_format == "xml") {
			listeners()->SetDefaultXmlGenerator(new XmlUnitTestResultPrinter(
			UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
			} else if (output_format != "") {
			GTEST_LOG_(WARNING) << "WARNING: unrecognized output format \""
			<< output_format
			<< "\" ignored.";
			}
			}

			#if GTEST_CAN_STREAM_RESULTS_
			// Initializes event listeners for streaming test results in string form.
			// Must not be called before InitGoogleTest.
			void UnitTestImpl::ConfigureStreamingOutput() {
			const std::string& target = GTEST_FLAG(stream_result_to);
			if (!target.empty()) {
			const size_t pos = target.find(':');
			if (pos != std::string::npos) {
			listeners()->Append(new StreamingListener(target.substr(0, pos),
			target.substr(pos+1)));
			} else {
			GTEST_LOG_(WARNING) << "unrecognized streaming target \""
			<< target
			<< "\" ignored.";
			}
			}
			}
			#endif // GTEST_CAN_STREAM_RESULTS_

			// Performs initialization dependent upon flag values obtained in
			// ParseGoogleTestFlagsOnly. Is called from InitGoogleTest after the call to
			// ParseGoogleTestFlagsOnly. In case a user neglects to call InitGoogleTest
			// this function is also called from RunAllTests. Since this function can be
			// called more than once, it has to be idempotent.
			void UnitTestImpl::PostFlagParsingInit() {
			// Ensures that this function does not execute more than once.
			if (!post_flag_parse_init_performed_) {
			post_flag_parse_init_performed_ = true;

			#if defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
			// Register to send notifications about key process state changes.
			listeners()->Append(new GTEST_CUSTOM_TEST_EVENT_LISTENER_());
			#endif // defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)

			#if GTEST_HAS_DEATH_TEST
			InitDeathTestSubprocessControlInfo();
			SuppressTestEventsIfInSubprocess();
			#endif // GTEST_HAS_DEATH_TEST

			// Registers parameterized tests. This makes parameterized tests
			// available to the UnitTest reflection API without running
			// RUN_ALL_TESTS.
			RegisterParameterizedTests();

			// Configures listeners for XML output. This makes it possible for users
			// to shut down the default XML output before invoking RUN_ALL_TESTS.
			ConfigureXmlOutput();

			#if GTEST_CAN_STREAM_RESULTS_
			// Configures listeners for streaming test results to the specified server.
			ConfigureStreamingOutput();
			#endif // GTEST_CAN_STREAM_RESULTS_
			}
			}

			// A predicate that checks the name of a TestCase against a known
			// value.
			//
			// This is used for implementation of the UnitTest class only. We put
			// it in the anonymous namespace to prevent polluting the outer
			// namespace.
			//
			// TestCaseNameIs is copyable.
			class TestCaseNameIs {
			public:
			// Constructor.
			explicit TestCaseNameIs(const std::string& name)
			: name_(name) {}

			// Returns true iff the name of test_case matches name_.
			bool operator()(const TestCase* test_case) const {
			return test_case != NULL && strcmp(test_case->name(), name_.c_str()) == 0;
			}

			private:
			std::string name_;
			};

			// Finds and returns a TestCase with the given name. If one doesn't
			// exist, creates one and returns it. It's the CALLER'S
			// RESPONSIBILITY to ensure that this function is only called WHEN THE
			// TESTS ARE NOT SHUFFLED.
			//
			// Arguments:
			//
			// test_case_name: name of the test case
			// type_param: the name of the test case's type parameter, or NULL if
			// this is not a typed or a type-parameterized test case.
			// set_up_tc: pointer to the function that sets up the test case
			// tear_down_tc: pointer to the function that tears down the test case
			TestCase* UnitTestImpl::GetTestCase(const char* test_case_name,
			const char* type_param,
			Test::SetUpTestCaseFunc set_up_tc,
			Test::TearDownTestCaseFunc tear_down_tc) {
			// Can we find a TestCase with the given name?
			const std::vector<TestCase*>::const_iterator test_case =
			std::find_if(test_cases_.begin(), test_cases_.end(),
			TestCaseNameIs(test_case_name));

			if (test_case != test_cases_.end())
			return *test_case;

			// No. Let's create one.
			TestCase* const new_test_case =
			new TestCase(test_case_name, type_param, set_up_tc, tear_down_tc);

			// Is this a death test case?
			if (internal::UnitTestOptions::MatchesFilter(test_case_name,
			kDeathTestCaseFilter)) {
			// Yes. Inserts the test case after the last death test case
			// defined so far. This only works when the test cases haven't
			// been shuffled. Otherwise we may end up running a death test
			// after a non-death test.
			++last_death_test_case_;
			test_cases_.insert(test_cases_.begin() + last_death_test_case_,
			new_test_case);
			} else {
			// No. Appends to the end of the list.
			test_cases_.push_back(new_test_case);
			}

			test_case_indices_.push_back(static_cast<int>(test_case_indices_.size()));
			return new_test_case;
			}

			// Helpers for setting up / tearing down the given environment. They
			// are for use in the ForEach() function.
			static void SetUpEnvironment(Environment* env) { env->SetUp(); }
			static void TearDownEnvironment(Environment* env) { env->TearDown(); }

			// Runs all tests in this UnitTest object, prints the result, and
			// returns true if all tests are successful. If any exception is
			// thrown during a test, the test is considered to be failed, but the
			// rest of the tests will still be run.
			//
			// When parameterized tests are enabled, it expands and registers
			// parameterized tests first in RegisterParameterizedTests().
			// All other functions called from RunAllTests() may safely assume that
			// parameterized tests are ready to be counted and run.
			bool UnitTestImpl::RunAllTests() {
			// Makes sure InitGoogleTest() was called.
			if (!GTestIsInitialized()) {
			GTEST_LOG_(ERROR) <<
			"\nThis test program did NOT call ::testing::InitGoogleTest "
			"before calling RUN_ALL_TESTS(). Please fix it.";
			return false;
			}

			// Do not run any test if the --help flag was specified.
			if (g_help_flag)
			return true;

			// Repeats the call to the post-flag parsing initialization in case the
			// user didn't call InitGoogleTest.
			PostFlagParsingInit();

			// Even if sharding is not on, test runners may want to use the
			// GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
			// protocol.
			internal::WriteToShardStatusFileIfNeeded();

			// True iff we are in a subprocess for running a thread-safe-style
			// death test.
			bool in_subprocess_for_death_test = false;

			#if GTEST_HAS_DEATH_TEST
			in_subprocess_for_death_test = (internal_run_death_test_flag_.get() != NULL);
			# if defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
			if (in_subprocess_for_death_test) {
			GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_();
			}
			# endif // defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
			#endif // GTEST_HAS_DEATH_TEST

			const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
			in_subprocess_for_death_test);

			// Compares the full test names with the filter to decide which
			// tests to run.
			const bool has_tests_to_run = FilterTests(should_shard
			? HONOR_SHARDING_PROTOCOL
			: IGNORE_SHARDING_PROTOCOL) > 0;

			// Lists the tests and exits if the --gtest_list_tests flag was specified.
			if (GTEST_FLAG(list_tests)) {
			// This must be called after FilterTests() has been called.
			ListTestsMatchingFilter();
			return true;
			}

			random_seed_ = GTEST_FLAG(shuffle) ?
			GetRandomSeedFromFlag(GTEST_FLAG(random_seed)) : 0;

			// True iff at least one test has failed.
			bool failed = false;

			TestEventListener* repeater = listeners()->repeater();

			start_timestamp_ = GetTimeInMillis();
			repeater->OnTestProgramStart(*parent_);

			// How many times to repeat the tests? We don't want to repeat them
			// when we are inside the subprocess of a death test.
			const int repeat = in_subprocess_for_death_test ? 1 : GTEST_FLAG(repeat);
			// Repeats forever if the repeat count is negative.
			const bool forever = repeat < 0;
			for (int i = 0; forever \|\| i != repeat; i++) {
			// We want to preserve failures generated by ad-hoc test
			// assertions executed before RUN_ALL_TESTS().
			ClearNonAdHocTestResult();

			const TimeInMillis start = GetTimeInMillis();

			// Shuffles test cases and tests if requested.
			if (has_tests_to_run && GTEST_FLAG(shuffle)) {
			random()->Reseed(random_seed_);
			// This should be done before calling OnTestIterationStart(),
			// such that a test event listener can see the actual test order
			// in the event.
			ShuffleTests();
			}

			// Tells the unit test event listeners that the tests are about to start.
			repeater->OnTestIterationStart(*parent_, i);

			// Runs each test case if there is at least one test to run.
			if (has_tests_to_run) {
			// Sets up all environments beforehand.
			repeater->OnEnvironmentsSetUpStart(*parent_);
			ForEach(environments_, SetUpEnvironment);
			repeater->OnEnvironmentsSetUpEnd(*parent_);

			// Runs the tests only if there was no fatal failure during global
			// set-up.
			if (!Test::HasFatalFailure()) {
			for (int test_index = 0; test_index < total_test_case_count();
			test_index++) {
			GetMutableTestCase(test_index)->Run();
			}
			}

			// Tears down all environments in reverse order afterwards.
			repeater->OnEnvironmentsTearDownStart(*parent_);
			std::for_each(environments_.rbegin(), environments_.rend(),
			TearDownEnvironment);
			repeater->OnEnvironmentsTearDownEnd(*parent_);
			}

			elapsed_time_ = GetTimeInMillis() - start;

			// Tells the unit test event listener that the tests have just finished.
			repeater->OnTestIterationEnd(*parent_, i);

			// Gets the result and clears it.
			if (!Passed()) {
			failed = true;
			}

			// Restores the original test order after the iteration. This
			// allows the user to quickly repro a failure that happens in the
			// N-th iteration without repeating the first (N - 1) iterations.
			// This is not enclosed in "if (GTEST_FLAG(shuffle)) { ... }", in
			// case the user somehow changes the value of the flag somewhere
			// (it's always safe to unshuffle the tests).
			UnshuffleTests();

			if (GTEST_FLAG(shuffle)) {
			// Picks a new random seed for each iteration.
			random_seed_ = GetNextRandomSeed(random_seed_);
			}
			}

			repeater->OnTestProgramEnd(*parent_);

			return !failed;
			}

			// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
			// if the variable is present. If a file already exists at this location, this
			// function will write over it. If the variable is present, but the file cannot
			// be created, prints an error and exits.
			void WriteToShardStatusFileIfNeeded() {
			const char* const test_shard_file = posix::GetEnv(kTestShardStatusFile);
			if (test_shard_file != NULL) {
			FILE* const file = posix::FOpen(test_shard_file, "w");
			if (file == NULL) {
			ColoredPrintf(COLOR_RED,
			"Could not write to the test shard status file \"%s\" "
			"specified by the %s environment variable.\n",
			test_shard_file, kTestShardStatusFile);
			fflush(stdout);
			exit(EXIT_FAILURE);
			}
			fclose(file);
			}
			}

			// Checks whether sharding is enabled by examining the relevant
			// environment variable values. If the variables are present,
			// but inconsistent (i.e., shard_index >= total_shards), prints
			// an error and exits. If in_subprocess_for_death_test, sharding is
			// disabled because it must only be applied to the original test
			// process. Otherwise, we could filter out death tests we intended to execute.
			bool ShouldShard(const char* total_shards_env,
			const char* shard_index_env,
			bool in_subprocess_for_death_test) {
			if (in_subprocess_for_death_test) {
			return false;
			}

			const Int32 total_shards = Int32FromEnvOrDie(total_shards_env, -1);
			const Int32 shard_index = Int32FromEnvOrDie(shard_index_env, -1);

			if (total_shards == -1 && shard_index == -1) {
			return false;
			} else if (total_shards == -1 && shard_index != -1) {
			const Message msg = Message()
			<< "Invalid environment variables: you have "
			<< kTestShardIndex << " = " << shard_index
			<< ", but have left " << kTestTotalShards << " unset.\n";
			ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
			fflush(stdout);
			exit(EXIT_FAILURE);
			} else if (total_shards != -1 && shard_index == -1) {
			const Message msg = Message()
			<< "Invalid environment variables: you have "
			<< kTestTotalShards << " = " << total_shards
			<< ", but have left " << kTestShardIndex << " unset.\n";
			ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
			fflush(stdout);
			exit(EXIT_FAILURE);
			} else if (shard_index < 0 \|\| shard_index >= total_shards) {
			const Message msg = Message()
			<< "Invalid environment variables: we require 0 <= "
			<< kTestShardIndex << " < " << kTestTotalShards
			<< ", but you have " << kTestShardIndex << "=" << shard_index
			<< ", " << kTestTotalShards << "=" << total_shards << ".\n";
			ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
			fflush(stdout);
			exit(EXIT_FAILURE);
			}

			return total_shards > 1;
			}

			// Parses the environment variable var as an Int32. If it is unset,
			// returns default_val. If it is not an Int32, prints an error
			// and aborts.
			Int32 Int32FromEnvOrDie(const char* var, Int32 default_val) {
			const char* str_val = posix::GetEnv(var);
			if (str_val == NULL) {
			return default_val;
			}

			Int32 result;
			if (!ParseInt32(Message() << "The value of environment variable " << var,
			str_val, &result)) {
			exit(EXIT_FAILURE);
			}
			return result;
			}

			// Given the total number of shards, the shard index, and the test id,
			// returns true iff the test should be run on this shard. The test id is
			// some arbitrary but unique non-negative integer assigned to each test
			// method. Assumes that 0 <= shard_index < total_shards.
			bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
			return (test_id % total_shards) == shard_index;
			}

			// Compares the name of each test with the user-specified filter to
			// decide whether the test should be run, then records the result in
			// each TestCase and TestInfo object.
			// If shard_tests == true, further filters tests based on sharding
			// variables in the environment - see
			// https://github.com/google/googletest/blob/master/googletest/docs/AdvancedGuide.md .
			// Returns the number of tests that should run.
			int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
			const Int32 total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
			Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
			const Int32 shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
			Int32FromEnvOrDie(kTestShardIndex, -1) : -1;

			// num_runnable_tests are the number of tests that will
			// run across all shards (i.e., match filter and are not disabled).
			// num_selected_tests are the number of tests to be run on
			// this shard.
			int num_runnable_tests = 0;
			int num_selected_tests = 0;
			for (size_t i = 0; i < test_cases_.size(); i++) {
			TestCase* const test_case = test_cases_[i];
			const std::string &test_case_name = test_case->name();
			test_case->set_should_run(false);

			for (size_t j = 0; j < test_case->test_info_list().size(); j++) {
			TestInfo* const test_info = test_case->test_info_list()[j];
			const std::string test_name(test_info->name());
			// A test is disabled if test case name or test name matches
			// kDisableTestFilter.
			const bool is_disabled =
			internal::UnitTestOptions::MatchesFilter(test_case_name,
			kDisableTestFilter) \|\|
			internal::UnitTestOptions::MatchesFilter(test_name,
			kDisableTestFilter);
			test_info->is_disabled_ = is_disabled;

			const bool matches_filter =
			internal::UnitTestOptions::FilterMatchesTest(test_case_name,
			test_name);
			test_info->matches_filter_ = matches_filter;

			const bool is_runnable =
			(GTEST_FLAG(also_run_disabled_tests) \|\| !is_disabled) &&
			matches_filter;

			const bool is_selected = is_runnable &&
			(shard_tests == IGNORE_SHARDING_PROTOCOL \|\|
			ShouldRunTestOnShard(total_shards, shard_index,
			num_runnable_tests));

			num_runnable_tests += is_runnable;
			num_selected_tests += is_selected;

			test_info->should_run_ = is_selected;
			test_case->set_should_run(test_case->should_run() \|\| is_selected);
			}
			}
			return num_selected_tests;
			}

			// Prints the given C-string on a single line by replacing all '\n'
			// characters with string "\\n". If the output takes more than
			// max_length characters, only prints the first max_length characters
			// and "...".
			static void PrintOnOneLine(const char* str, int max_length) {
			if (str != NULL) {
			for (int i = 0; *str != '\0'; ++str) {
			if (i >= max_length) {
			printf("...");
			break;
			}
			if (*str == '\n') {
			printf("\\n");
			i += 2;
			} else {
			printf("%c", *str);
			++i;
			}
			}
			}
			}

			// Prints the names of the tests matching the user-specified filter flag.
			void UnitTestImpl::ListTestsMatchingFilter() {
			// Print at most this many characters for each type/value parameter.
			const int kMaxParamLength = 250;

			for (size_t i = 0; i < test_cases_.size(); i++) {
			const TestCase* const test_case = test_cases_[i];
			bool printed_test_case_name = false;

			for (size_t j = 0; j < test_case->test_info_list().size(); j++) {
			const TestInfo* const test_info =
			test_case->test_info_list()[j];
			if (test_info->matches_filter_) {
			if (!printed_test_case_name) {
			printed_test_case_name = true;
			printf("%s.", test_case->name());
			if (test_case->type_param() != NULL) {
			printf(" # %s = ", kTypeParamLabel);
			// We print the type parameter on a single line to make
			// the output easy to parse by a program.
			PrintOnOneLine(test_case->type_param(), kMaxParamLength);
			}
			printf("\n");
			}
			printf(" %s", test_info->name());
			if (test_info->value_param() != NULL) {
			printf(" # %s = ", kValueParamLabel);
			// We print the value parameter on a single line to make the
			// output easy to parse by a program.
			PrintOnOneLine(test_info->value_param(), kMaxParamLength);
			}
			printf("\n");
			}
			}
			}
			fflush(stdout);
			}

			// Sets the OS stack trace getter.
			//
			// Does nothing if the input and the current OS stack trace getter are
			// the same; otherwise, deletes the old getter and makes the input the
			// current getter.
			void UnitTestImpl::set_os_stack_trace_getter(
			OsStackTraceGetterInterface* getter) {
			if (os_stack_trace_getter_ != getter) {
			delete os_stack_trace_getter_;
			os_stack_trace_getter_ = getter;
			}
			}

			// Returns the current OS stack trace getter if it is not NULL;
			// otherwise, creates an OsStackTraceGetter, makes it the current
			// getter, and returns it.
			OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
			if (os_stack_trace_getter_ == NULL) {
			#ifdef GTEST_OS_STACK_TRACE_GETTER_
			os_stack_trace_getter_ = new GTEST_OS_STACK_TRACE_GETTER_;
			#else
			os_stack_trace_getter_ = new OsStackTraceGetter;
			#endif // GTEST_OS_STACK_TRACE_GETTER_
			}

			return os_stack_trace_getter_;
			}

			// Returns the TestResult for the test that's currently running, or
			// the TestResult for the ad hoc test if no test is running.
			TestResult* UnitTestImpl::current_test_result() {
			return current_test_info_ ?
			&(current_test_info_->result_) : &ad_hoc_test_result_;
			}

			// Shuffles all test cases, and the tests within each test case,
			// making sure that death tests are still run first.
			void UnitTestImpl::ShuffleTests() {
			// Shuffles the death test cases.
			ShuffleRange(random(), 0, last_death_test_case_ + 1, &test_case_indices_);

			// Shuffles the non-death test cases.
			ShuffleRange(random(), last_death_test_case_ + 1,
			static_cast<int>(test_cases_.size()), &test_case_indices_);

			// Shuffles the tests inside each test case.
			for (size_t i = 0; i < test_cases_.size(); i++) {
			test_cases_[i]->ShuffleTests(random());
			}
			}

			// Restores the test cases and tests to their order before the first shuffle.
			void UnitTestImpl::UnshuffleTests() {
			for (size_t i = 0; i < test_cases_.size(); i++) {
			// Unshuffles the tests in each test case.
			test_cases_[i]->UnshuffleTests();
			// Resets the index of each test case.
			test_case_indices_[i] = static_cast<int>(i);
			}
			}

			// Returns the current OS stack trace as an std::string.
			//
			// The maximum number of stack frames to be included is specified by
			// the gtest_stack_trace_depth flag. The skip_count parameter
			// specifies the number of top frames to be skipped, which doesn't
			// count against the number of frames to be included.
			//
			// For example, if Foo() calls Bar(), which in turn calls
			// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
			// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
			std::string GetCurrentOsStackTraceExceptTop(UnitTest* /unit_test/,
			int skip_count) {
			// We pass skip_count + 1 to skip this wrapper function in addition
			// to what the user really wants to skip.
			return GetUnitTestImpl()->CurrentOsStackTraceExceptTop(skip_count + 1);
			}

			// Used by the GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ macro to
			// suppress unreachable code warnings.
			namespace {
			class ClassUniqueToAlwaysTrue {};
			}

			bool IsTrue(bool condition) { return condition; }

			bool AlwaysTrue() {
			#if GTEST_HAS_EXCEPTIONS
			// This condition is always false so AlwaysTrue() never actually throws,
			// but it makes the compiler think that it may throw.
			if (IsTrue(false))
			throw ClassUniqueToAlwaysTrue();
			#endif // GTEST_HAS_EXCEPTIONS
			return true;
			}

			// If pstr starts with the given prefix, modifies pstr to be right
			// past the prefix and returns true; otherwise leaves *pstr unchanged
			// and returns false. None of pstr, *pstr, and prefix can be NULL.
			bool SkipPrefix(const char* prefix, const char** pstr) {
			const size_t prefix_len = strlen(prefix);
			if (strncmp(*pstr, prefix, prefix_len) == 0) {
			*pstr += prefix_len;
			return true;
			}
			return false;
			}

			// Parses a string as a command line flag. The string should have
			// the format "--flag=value". When def_optional is true, the "=value"
			// part can be omitted.
			//
			// Returns the value of the flag, or NULL if the parsing failed.
			const char* ParseFlagValue(const char* str,
			const char* flag,
			bool def_optional) {
			// str and flag must not be NULL.
			if (str == NULL \|\| flag == NULL) return NULL;

			// The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
			const std::string flag_str = std::string("--") + GTEST_FLAG_PREFIX_ + flag;
			const size_t flag_len = flag_str.length();
			if (strncmp(str, flag_str.c_str(), flag_len) != 0) return NULL;

			// Skips the flag name.
			const char* flag_end = str + flag_len;

			// When def_optional is true, it's OK to not have a "=value" part.
			if (def_optional && (flag_end[0] == '\0')) {
			return flag_end;
			}

			// If def_optional is true and there are more characters after the
			// flag name, or if def_optional is false, there must be a '=' after
			// the flag name.
			if (flag_end[0] != '=') return NULL;

			// Returns the string after "=".
			return flag_end + 1;
			}

			// Parses a string for a bool flag, in the form of either
			// "--flag=value" or "--flag".
			//
			// In the former case, the value is taken as true as long as it does
			// not start with '0', 'f', or 'F'.
			//
			// In the latter case, the value is taken as true.
			//
			// On success, stores the value of the flag in *value, and returns
			// true. On failure, returns false without changing *value.
			bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
			// Gets the value of the flag as a string.
			const char* const value_str = ParseFlagValue(str, flag, true);

			// Aborts if the parsing failed.
			if (value_str == NULL) return false;

			// Converts the string value to a bool.
			value = !(value_str == '0' \|\| value_str == 'f' \|\| value_str == 'F');
			return true;
			}

			// Parses a string for an Int32 flag, in the form of
			// "--flag=value".
			//
			// On success, stores the value of the flag in *value, and returns
			// true. On failure, returns false without changing *value.
			bool ParseInt32Flag(const char* str, const char* flag, Int32* value) {
			// Gets the value of the flag as a string.
			const char* const value_str = ParseFlagValue(str, flag, false);

			// Aborts if the parsing failed.
			if (value_str == NULL) return false;

			// Sets *value to the value of the flag.
			return ParseInt32(Message() << "The value of flag --" << flag,
			value_str, value);
			}

			// Parses a string for a string flag, in the form of
			// "--flag=value".
			//
			// On success, stores the value of the flag in *value, and returns
			// true. On failure, returns false without changing *value.
			bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
			// Gets the value of the flag as a string.
			const char* const value_str = ParseFlagValue(str, flag, false);

			// Aborts if the parsing failed.
			if (value_str == NULL) return false;

			// Sets *value to the value of the flag.
			*value = value_str;
			return true;
			}

			// Determines whether a string has a prefix that Google Test uses for its
			// flags, i.e., starts with GTEST_FLAG_PREFIX_ or GTEST_FLAG_PREFIX_DASH_.
			// If Google Test detects that a command line flag has its prefix but is not
			// recognized, it will print its help message. Flags starting with
			// GTEST_INTERNAL_PREFIX_ followed by "internal_" are considered Google Test
			// internal flags and do not trigger the help message.
			static bool HasGoogleTestFlagPrefix(const char* str) {
			return (SkipPrefix("--", &str) \|\|
			SkipPrefix("-", &str) \|\|
			SkipPrefix("/", &str)) &&
			!SkipPrefix(GTEST_FLAG_PREFIX_ "internal_", &str) &&
			(SkipPrefix(GTEST_FLAG_PREFIX_, &str) \|\|
			SkipPrefix(GTEST_FLAG_PREFIX_DASH_, &str));
			}

			// Prints a string containing code-encoded text. The following escape
			// sequences can be used in the string to control the text color:
			//
			// @@ prints a single '@' character.
			// @R changes the color to red.
			// @G changes the color to green.
			// @Y changes the color to yellow.
			// @D changes to the default terminal text color.
			//
			// TODO(wan@google.com): Write tests for this once we add stdout
			// capturing to Google Test.
			static void PrintColorEncoded(const char* str) {
			GTestColor color = COLOR_DEFAULT; // The current color.

			// Conceptually, we split the string into segments divided by escape
			// sequences. Then we print one segment at a time. At the end of
			// each iteration, the str pointer advances to the beginning of the
			// next segment.
			for (;;) {
			const char* p = strchr(str, '@');
			if (p == NULL) {
			ColoredPrintf(color, "%s", str);
			return;
			}

			ColoredPrintf(color, "%s", std::string(str, p).c_str());

			const char ch = p[1];
			str = p + 2;
			if (ch == '@') {
			ColoredPrintf(color, "@");
			} else if (ch == 'D') {
			color = COLOR_DEFAULT;
			} else if (ch == 'R') {
			color = COLOR_RED;
			} else if (ch == 'G') {
			color = COLOR_GREEN;
			} else if (ch == 'Y') {
			color = COLOR_YELLOW;
			} else {
			--str;
			}
			}
			}

			static const char kColorEncodedHelpMessage[] =
			"This program contains tests written using " GTEST_NAME_ ". You can use the\n"
			"following command line flags to control its behavior:\n"
			"\n"
			"Test Selection:\n"
			" @G--" GTEST_FLAG_PREFIX_ "list_tests@D\n"
			" List the names of all tests instead of running them. The name of\n"
			" TEST(Foo, Bar) is \"Foo.Bar\".\n"
			" @G--" GTEST_FLAG_PREFIX_ "filter=@YPOSTIVE_PATTERNS"
			"[@G-@YNEGATIVE_PATTERNS]@D\n"
			" Run only the tests whose name matches one of the positive patterns but\n"
			" none of the negative patterns. '?' matches any single character; '*'\n"
			" matches any substring; ':' separates two patterns.\n"
			" @G--" GTEST_FLAG_PREFIX_ "also_run_disabled_tests@D\n"
			" Run all disabled tests too.\n"
			"\n"
			"Test Execution:\n"
			" @G--" GTEST_FLAG_PREFIX_ "repeat=@Y[COUNT]@D\n"
			" Run the tests repeatedly; use a negative count to repeat forever.\n"
			" @G--" GTEST_FLAG_PREFIX_ "shuffle@D\n"
			" Randomize tests' orders on every iteration.\n"
			" @G--" GTEST_FLAG_PREFIX_ "random_seed=@Y[NUMBER]@D\n"
			" Random number seed to use for shuffling test orders (between 1 and\n"
			" 99999, or 0 to use a seed based on the current time).\n"
			"\n"
			"Test Output:\n"
			" @G--" GTEST_FLAG_PREFIX_ "color=@Y(@Gyes@Y\|@Gno@Y\|@Gauto@Y)@D\n"
			" Enable/disable colored output. The default is @Gauto@D.\n"
			" @G--" GTEST_FLAG_PREFIX_ "print_time=0@D\n"
			" Don't print the elapsed time of each test.\n"
			" @G--" GTEST_FLAG_PREFIX_ "output=xml@Y[@G:@YDIRECTORY_PATH@G"
			GTEST_PATH_SEP_ "@Y\|@G:@YFILE_PATH]@D\n"
			" Generate an XML report in the given directory or with the given file\n"
			" name. @YFILE_PATH@D defaults to @Gtest_detail.xml@D.\n"
			#if GTEST_CAN_STREAM_RESULTS_
			" @G--" GTEST_FLAG_PREFIX_ "stream_result_to=@YHOST@G:@YPORT@D\n"
			" Stream test results to the given server.\n"
			#endif // GTEST_CAN_STREAM_RESULTS_
			"\n"
			"Assertion Behavior:\n"
			#if GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
			" @G--" GTEST_FLAG_PREFIX_ "death_test_style=@Y(@Gfast@Y\|@Gthreadsafe@Y)@D\n"
			" Set the default death test style.\n"
			#endif // GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
			" @G--" GTEST_FLAG_PREFIX_ "break_on_failure@D\n"
			" Turn assertion failures into debugger break-points.\n"
			" @G--" GTEST_FLAG_PREFIX_ "throw_on_failure@D\n"
			" Turn assertion failures into C++ exceptions.\n"
			" @G--" GTEST_FLAG_PREFIX_ "catch_exceptions=0@D\n"
			" Do not report exceptions as test failures. Instead, allow them\n"
			" to crash the program or throw a pop-up (on Windows).\n"
			"\n"
			"Except for @G--" GTEST_FLAG_PREFIX_ "list_tests@D, you can alternatively set "
			"the corresponding\n"
			"environment variable of a flag (all letters in upper-case). For example, to\n"
			"disable colored text output, you can either specify @G--" GTEST_FLAG_PREFIX_
			"color=no@D or set\n"
			"the @G" GTEST_FLAG_PREFIX_UPPER_ "COLOR@D environment variable to @Gno@D.\n"
			"\n"
			"For more information, please read the " GTEST_NAME_ " documentation at\n"
			"@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_ "\n"
			"(not one in your own code or tests), please report it to\n"
			"@G<" GTEST_DEV_EMAIL_ ">@D.\n";

			bool ParseGoogleTestFlag(const char* const arg) {
			return ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
			&GTEST_FLAG(also_run_disabled_tests)) \|\|
			ParseBoolFlag(arg, kBreakOnFailureFlag,
			&GTEST_FLAG(break_on_failure)) \|\|
			ParseBoolFlag(arg, kCatchExceptionsFlag,
			&GTEST_FLAG(catch_exceptions)) \|\|
			ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) \|\|
			ParseStringFlag(arg, kDeathTestStyleFlag,
			&GTEST_FLAG(death_test_style)) \|\|
			ParseBoolFlag(arg, kDeathTestUseFork,
			&GTEST_FLAG(death_test_use_fork)) \|\|
			ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) \|\|
			ParseStringFlag(arg, kInternalRunDeathTestFlag,
			&GTEST_FLAG(internal_run_death_test)) \|\|
			ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) \|\|
			ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) \|\|
			ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) \|\|
			ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) \|\|
			ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) \|\|
			ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) \|\|
			ParseInt32Flag(arg, kStackTraceDepthFlag,
			&GTEST_FLAG(stack_trace_depth)) \|\|
			ParseStringFlag(arg, kStreamResultToFlag,
			&GTEST_FLAG(stream_result_to)) \|\|
			ParseBoolFlag(arg, kThrowOnFailureFlag,
			&GTEST_FLAG(throw_on_failure));
			}

			#if GTEST_USE_OWN_FLAGFILE_FLAG_
			void LoadFlagsFromFile(const std::string& path) {
			FILE* flagfile = posix::FOpen(path.c_str(), "r");
			if (!flagfile) {
			GTEST_LOG_(FATAL) << "Unable to open file \""
			<< GTEST_FLAG(flagfile)
			<< "\"";
			}
			std::string contents(ReadEntireFile(flagfile));
			posix::FClose(flagfile);
			std::vector<std::string> lines;
			SplitString(contents, '\n', &lines);
			for (size_t i = 0; i < lines.size(); ++i) {
			if (lines[i].empty())
			continue;
			if (!ParseGoogleTestFlag(lines[i].c_str()))
			g_help_flag = true;
			}
			}
			#endif // GTEST_USE_OWN_FLAGFILE_FLAG_

			// Parses the command line for Google Test flags, without initializing
			// other parts of Google Test. The type parameter CharType can be
			// instantiated to either char or wchar_t.
			template <typename CharType>
			void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
			for (int i = 1; i < *argc; i++) {
			const std::string arg_string = StreamableToString(argv[i]);
			const char* const arg = arg_string.c_str();

			using internal::ParseBoolFlag;
			using internal::ParseInt32Flag;
			using internal::ParseStringFlag;

			bool remove_flag = false;
			if (ParseGoogleTestFlag(arg)) {
			remove_flag = true;
			#if GTEST_USE_OWN_FLAGFILE_FLAG_
			} else if (ParseStringFlag(arg, kFlagfileFlag, &GTEST_FLAG(flagfile))) {
			LoadFlagsFromFile(GTEST_FLAG(flagfile));
			remove_flag = true;
			#endif // GTEST_USE_OWN_FLAGFILE_FLAG_
			} else if (arg_string == "--help" \|\| arg_string == "-h" \|\|
			arg_string == "-?" \|\| arg_string == "/?" \|\|
			HasGoogleTestFlagPrefix(arg)) {
			// Both help flag and unrecognized Google Test flags (excluding
			// internal ones) trigger help display.
			g_help_flag = true;
			}

			if (remove_flag) {
			// Shift the remainder of the argv list left by one. Note
			// that argv has (*argc + 1) elements, the last one always being
			// NULL. The following loop moves the trailing NULL element as
			// well.
			for (int j = i; j != *argc; j++) {
			argv[j] = argv[j + 1];
			}

			// Decrements the argument count.
			(*argc)--;

			// We also need to decrement the iterator as we just removed
			// an element.
			i--;
			}
			}

			if (g_help_flag) {
			// We print the help here instead of in RUN_ALL_TESTS(), as the
			// latter may not be called at all if the user is using Google
			// Test with another testing framework.
			PrintColorEncoded(kColorEncodedHelpMessage);
			}
			}

			// Parses the command line for Google Test flags, without initializing
			// other parts of Google Test.
			void ParseGoogleTestFlagsOnly(int* argc, char** argv) {
			ParseGoogleTestFlagsOnlyImpl(argc, argv);
			}
			void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
			ParseGoogleTestFlagsOnlyImpl(argc, argv);
			}

			// The internal implementation of InitGoogleTest().
			//
			// The type parameter CharType can be instantiated to either char or
			// wchar_t.
			template <typename CharType>
			void InitGoogleTestImpl(int* argc, CharType** argv) {
			// We don't want to run the initialization code twice.
			if (GTestIsInitialized()) return;

			if (*argc <= 0) return;

			g_argvs.clear();
			for (int i = 0; i != *argc; i++) {
			g_argvs.push_back(StreamableToString(argv[i]));
			}

			ParseGoogleTestFlagsOnly(argc, argv);
			GetUnitTestImpl()->PostFlagParsingInit();
			}

			} // namespace internal

			// Initializes Google Test. This must be called before calling
			// RUN_ALL_TESTS(). In particular, it parses a command line for the
			// flags that Google Test recognizes. Whenever a Google Test flag is
			// seen, it is removed from argv, and *argc is decremented.
			//
			// No value is returned. Instead, the Google Test flag variables are
			// updated.
			//
			// Calling the function for the second time has no user-visible effect.
			void InitGoogleTest(int* argc, char** argv) {
			#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
			GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
			#else // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
			internal::InitGoogleTestImpl(argc, argv);
			#endif // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
			}

			// This overloaded version can be used in Windows programs compiled in
			// UNICODE mode.
			void InitGoogleTest(int* argc, wchar_t** argv) {
			#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
			GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
			#else // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
			internal::InitGoogleTestImpl(argc, argv);
			#endif // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
			}

			std::string TempDir() {
			#if defined(GTEST_CUSTOM_TEMPDIR_FUNCTION_)
			return GTEST_CUSTOM_TEMPDIR_FUNCTION_();
			#endif
			#if GTEST_OS_WINDOWS_MOBILE
			return "\\temp\\";
			#elif GTEST_OS_WINDOWS
			const char* temp_dir = internal::posix::GetEnv("TEMP");
			if (temp_dir == NULL \|\| temp_dir[0] == '\0')
			return "\\temp\\";
			else if (temp_dir[strlen(temp_dir) - 1] == '\\')
			return temp_dir;
			else
			return std::string(temp_dir) + "\\";
			#elif GTEST_OS_LINUX_ANDROID
			return "/sdcard/";
			#else
			return "/tmp/";
			#endif // GTEST_OS_WINDOWS_MOBILE
			}

			} // namespace testing

NeuroProject/googletest/src/gtest.cc
339a3c0bf940master

gtest.cc
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NeuroProject/googletest/src/gtest.cc339a3c0bf940master

gtest.ccView Options

NeuroProject/googletest/src/gtest.cc
339a3c0bf940master

gtest.cc
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