gtest.h
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gtest.h
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	// 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)
	//
	// This header file defines the public API for Google Test. It should be
	// included by any test program that uses Google Test.
	//
	// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
	// leave some internal implementation details in this header file.
	// They are clearly marked by comments like this:
	//
	// // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	//
	// Such code is NOT meant to be used by a user directly, and is subject
	// to CHANGE WITHOUT NOTICE. Therefore DO NOT DEPEND ON IT in a user
	// program!
	//
	// Acknowledgment: Google Test borrowed the idea of automatic test
	// registration from Barthelemy Dagenais' (barthelemy@prologique.com)
	// easyUnit framework.

	#ifndef GTEST_INCLUDE_GTEST_GTEST_H_
	#define GTEST_INCLUDE_GTEST_GTEST_H_

	#include <limits>
	#include <vector>

	#include <gtest/internal/gtest-internal.h>
	#include <gtest/internal/gtest-string.h>
	#include <gtest/gtest-death-test.h>
	#include <gtest/gtest-message.h>
	#include <gtest/gtest-param-test.h>
	#include <gtest/gtest-printers.h>
	#include <gtest/gtest_prod.h>
	#include <gtest/gtest-test-part.h>
	#include <gtest/gtest-typed-test.h>

	// Depending on the platform, different string classes are available.
	// On Linux, in addition to ::std::string, Google also makes use of
	// class ::string, which has the same interface as ::std::string, but
	// has a different implementation.
	//
	// The user can define GTEST_HAS_GLOBAL_STRING to 1 to indicate that
	// ::string is available AND is a distinct type to ::std::string, or
	// define it to 0 to indicate otherwise.
	//
	// If the user's ::std::string and ::string are the same class due to
	// aliasing, he should define GTEST_HAS_GLOBAL_STRING to 0.
	//
	// If the user doesn't define GTEST_HAS_GLOBAL_STRING, it is defined
	// heuristically.

	namespace testing {

	// Declares the flags.

	// This flag temporary enables the disabled tests.
	GTEST_DECLARE_bool_(also_run_disabled_tests);

	// This flag brings the debugger on an assertion failure.
	GTEST_DECLARE_bool_(break_on_failure);

	// This flag controls whether Google Test catches all test-thrown exceptions
	// and logs them as failures.
	GTEST_DECLARE_bool_(catch_exceptions);

	// This flag enables using colors in terminal output. Available values are
	// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
	// to let Google Test decide.
	GTEST_DECLARE_string_(color);

	// This flag sets up the filter to select by name using a glob pattern
	// the tests to run. If the filter is not given all tests are executed.
	GTEST_DECLARE_string_(filter);

	// This flag causes the Google Test to list tests. None of the tests listed
	// are actually run if the flag is provided.
	GTEST_DECLARE_bool_(list_tests);

	// This flag controls whether Google Test emits a detailed XML report to a file
	// in addition to its normal textual output.
	GTEST_DECLARE_string_(output);

	// This flags control whether Google Test prints the elapsed time for each
	// test.
	GTEST_DECLARE_bool_(print_time);

	// This flag specifies the random number seed.
	GTEST_DECLARE_int32_(random_seed);

	// This flag sets how many times the tests are repeated. The default value
	// is 1. If the value is -1 the tests are repeating forever.
	GTEST_DECLARE_int32_(repeat);

	// This flag controls whether Google Test includes Google Test internal
	// stack frames in failure stack traces.
	GTEST_DECLARE_bool_(show_internal_stack_frames);

	// When this flag is specified, tests' order is randomized on every iteration.
	GTEST_DECLARE_bool_(shuffle);

	// This flag specifies the maximum number of stack frames to be
	// printed in a failure message.
	GTEST_DECLARE_int32_(stack_trace_depth);

	// 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.
	GTEST_DECLARE_bool_(throw_on_failure);

	// The upper limit for valid stack trace depths.
	const int kMaxStackTraceDepth = 100;

	namespace internal {

	class AssertHelper;
	class DefaultGlobalTestPartResultReporter;
	class ExecDeathTest;
	class NoExecDeathTest;
	class FinalSuccessChecker;
	class GTestFlagSaver;
	class TestResultAccessor;
	class TestEventListenersAccessor;
	class TestEventRepeater;
	class WindowsDeathTest;
	class UnitTestImpl* GetUnitTestImpl();
	void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
	const String& message);
	class PrettyUnitTestResultPrinter;
	class XmlUnitTestResultPrinter;

	// Converts a streamable value to a String. A NULL pointer is
	// converted to "(null)". When the input value is a ::string,
	// ::std::string, ::wstring, or ::std::wstring object, each NUL
	// character in it is replaced with "\\0".
	// Declared in gtest-internal.h but defined here, so that it has access
	// to the definition of the Message class, required by the ARM
	// compiler.
	template <typename T>
	String StreamableToString(const T& streamable) {
	return (Message() << streamable).GetString();
	}

	} // namespace internal

	// A class for indicating whether an assertion was successful. When
	// the assertion wasn't successful, the AssertionResult object
	// remembers a non-empty message that describes how it failed.
	//
	// To create an instance of this class, use one of the factory functions
	// (AssertionSuccess() and AssertionFailure()).
	//
	// This class is useful for two purposes:
	// 1. Defining predicate functions to be used with Boolean test assertions
	// EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
	// 2. Defining predicate-format functions to be
	// used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
	//
	// For example, if you define IsEven predicate:
	//
	// testing::AssertionResult IsEven(int n) {
	// if ((n % 2) == 0)
	// return testing::AssertionSuccess();
	// else
	// return testing::AssertionFailure() << n << " is odd";
	// }
	//
	// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
	// will print the message
	//
	// Value of: IsEven(Fib(5))
	// Actual: false (5 is odd)
	// Expected: true
	//
	// instead of a more opaque
	//
	// Value of: IsEven(Fib(5))
	// Actual: false
	// Expected: true
	//
	// in case IsEven is a simple Boolean predicate.
	//
	// If you expect your predicate to be reused and want to support informative
	// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
	// about half as often as positive ones in our tests), supply messages for
	// both success and failure cases:
	//
	// testing::AssertionResult IsEven(int n) {
	// if ((n % 2) == 0)
	// return testing::AssertionSuccess() << n << " is even";
	// else
	// return testing::AssertionFailure() << n << " is odd";
	// }
	//
	// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
	//
	// Value of: IsEven(Fib(6))
	// Actual: true (8 is even)
	// Expected: false
	//
	// NB: Predicates that support negative Boolean assertions have reduced
	// performance in positive ones so be careful not to use them in tests
	// that have lots (tens of thousands) of positive Boolean assertions.
	//
	// To use this class with EXPECT_PRED_FORMAT assertions such as:
	//
	// // Verifies that Foo() returns an even number.
	// EXPECT_PRED_FORMAT1(IsEven, Foo());
	//
	// you need to define:
	//
	// testing::AssertionResult IsEven(const char* expr, int n) {
	// if ((n % 2) == 0)
	// return testing::AssertionSuccess();
	// else
	// return testing::AssertionFailure()
	// << "Expected: " << expr << " is even\n Actual: it's " << n;
	// }
	//
	// If Foo() returns 5, you will see the following message:
	//
	// Expected: Foo() is even
	// Actual: it's 5
	//
	class GTEST_API_ AssertionResult {
	public:
	// Copy constructor.
	// Used in EXPECT_TRUE/FALSE(assertion_result).
	AssertionResult(const AssertionResult& other);
	// Used in the EXPECT_TRUE/FALSE(bool_expression).
	explicit AssertionResult(bool success) : success_(success) {}

	// Returns true iff the assertion succeeded.
	operator bool() const { return success_; } // NOLINT

	// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
	AssertionResult operator!() const;

	// Returns the text streamed into this AssertionResult. Test assertions
	// use it when they fail (i.e., the predicate's outcome doesn't match the
	// assertion's expectation). When nothing has been streamed into the
	// object, returns an empty string.
	const char* message() const {
	return message_.get() != NULL && message_->c_str() != NULL ?
	message_->c_str() : "";
	}
	// TODO(vladl@google.com): Remove this after making sure no clients use it.
	// Deprecated; please use message() instead.
	const char* failure_message() const { return message(); }

	// Streams a custom failure message into this object.
	template <typename T> AssertionResult& operator<<(const T& value);

	private:
	// No implementation - we want AssertionResult to be
	// copy-constructible but not assignable.
	void operator=(const AssertionResult& other);

	// Stores result of the assertion predicate.
	bool success_;
	// Stores the message describing the condition in case the expectation
	// construct is not satisfied with the predicate's outcome.
	// Referenced via a pointer to avoid taking too much stack frame space
	// with test assertions.
	internal::scoped_ptr<internal::String> message_;
	}; // class AssertionResult

	// Streams a custom failure message into this object.
	template <typename T>
	AssertionResult& AssertionResult::operator<<(const T& value) {
	Message msg;
	if (message_.get() != NULL)
	msg << *message_;
	msg << value;
	message_.reset(new internal::String(msg.GetString()));
	return *this;
	}

	// Makes a successful assertion result.
	GTEST_API_ AssertionResult AssertionSuccess();

	// Makes a failed assertion result.
	GTEST_API_ AssertionResult AssertionFailure();

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

	// The abstract class that all tests inherit from.
	//
	// In Google Test, a unit test program contains one or many TestCases, and
	// each TestCase contains one or many Tests.
	//
	// When you define a test using the TEST macro, you don't need to
	// explicitly derive from Test - the TEST macro automatically does
	// this for you.
	//
	// The only time you derive from Test is when defining a test fixture
	// to be used a TEST_F. For example:
	//
	// class FooTest : public testing::Test {
	// protected:
	// virtual void SetUp() { ... }
	// virtual void TearDown() { ... }
	// ...
	// };
	//
	// TEST_F(FooTest, Bar) { ... }
	// TEST_F(FooTest, Baz) { ... }
	//
	// Test is not copyable.
	class GTEST_API_ Test {
	public:
	friend class TestInfo;

	// Defines types for pointers to functions that set up and tear down
	// a test case.
	typedef internal::SetUpTestCaseFunc SetUpTestCaseFunc;
	typedef internal::TearDownTestCaseFunc TearDownTestCaseFunc;

	// The d'tor is virtual as we intend to inherit from Test.
	virtual ~Test();

	// Sets up the stuff shared by all tests in this test case.
	//
	// Google Test will call Foo::SetUpTestCase() before running the first
	// test in test case Foo. Hence a sub-class can define its own
	// SetUpTestCase() method to shadow the one defined in the super
	// class.
	static void SetUpTestCase() {}

	// Tears down the stuff shared by all tests in this test case.
	//
	// Google Test will call Foo::TearDownTestCase() after running the last
	// test in test case Foo. Hence a sub-class can define its own
	// TearDownTestCase() method to shadow the one defined in the super
	// class.
	static void TearDownTestCase() {}

	// Returns true iff the current test has a fatal failure.
	static bool HasFatalFailure();

	// Returns true iff the current test has a non-fatal failure.
	static bool HasNonfatalFailure();

	// Returns true iff the current test has a (either fatal or
	// non-fatal) failure.
	static bool HasFailure() { return HasFatalFailure() \|\| HasNonfatalFailure(); }

	// Logs a property for the current test. Only the last value for a given
	// key is remembered.
	// These are public static so they can be called from utility functions
	// that are not members of the test fixture.
	// The arguments are const char* instead strings, as Google Test is used
	// on platforms where string doesn't compile.
	//
	// Note that a driving consideration for these RecordProperty methods
	// was to produce xml output suited to the Greenspan charting utility,
	// which at present will only chart values that fit in a 32-bit int. It
	// is the user's responsibility to restrict their values to 32-bit ints
	// if they intend them to be used with Greenspan.
	static void RecordProperty(const char* key, const char* value);
	static void RecordProperty(const char* key, int value);

	protected:
	// Creates a Test object.
	Test();

	// Sets up the test fixture.
	virtual void SetUp();

	// Tears down the test fixture.
	virtual void TearDown();

	private:
	// Returns true iff the current test has the same fixture class as
	// the first test in the current test case.
	static bool HasSameFixtureClass();

	// Runs the test after the test fixture has been set up.
	//
	// A sub-class must implement this to define the test logic.
	//
	// DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
	// Instead, use the TEST or TEST_F macro.
	virtual void TestBody() = 0;

	// Sets up, executes, and tears down the test.
	void Run();

	// Deletes self. We deliberately pick an unusual name for this
	// internal method to avoid clashing with names used in user TESTs.
	void DeleteSelf_() { delete this; }

	// Uses a GTestFlagSaver to save and restore all Google Test flags.
	const internal::GTestFlagSaver* const gtest_flag_saver_;

	// Often a user mis-spells SetUp() as Setup() and spends a long time
	// wondering why it is never called by Google Test. The declaration of
	// the following method is solely for catching such an error at
	// compile time:
	//
	// - The return type is deliberately chosen to be not void, so it
	// will be a conflict if a user declares void Setup() in his test
	// fixture.
	//
	// - This method is private, so it will be another compiler error
	// if a user calls it from his test fixture.
	//
	// DO NOT OVERRIDE THIS FUNCTION.
	//
	// If you see an error about overriding the following function or
	// about it being private, you have mis-spelled SetUp() as Setup().
	struct Setup_should_be_spelled_SetUp {};
	virtual Setup_should_be_spelled_SetUp* Setup() { return NULL; }

	// We disallow copying Tests.
	GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
	};

	typedef internal::TimeInMillis TimeInMillis;

	// A copyable object representing a user specified test property which can be
	// output as a key/value string pair.
	//
	// Don't inherit from TestProperty as its destructor is not virtual.
	class TestProperty {
	public:
	// C'tor. TestProperty does NOT have a default constructor.
	// Always use this constructor (with parameters) to create a
	// TestProperty object.
	TestProperty(const char* a_key, const char* a_value) :
	key_(a_key), value_(a_value) {
	}

	// Gets the user supplied key.
	const char* key() const {
	return key_.c_str();
	}

	// Gets the user supplied value.
	const char* value() const {
	return value_.c_str();
	}

	// Sets a new value, overriding the one supplied in the constructor.
	void SetValue(const char* new_value) {
	value_ = new_value;
	}

	private:
	// The key supplied by the user.
	internal::String key_;
	// The value supplied by the user.
	internal::String value_;
	};

	// The result of a single Test. This includes a list of
	// TestPartResults, a list of TestProperties, a count of how many
	// death tests there are in the Test, and how much time it took to run
	// the Test.
	//
	// TestResult is not copyable.
	class GTEST_API_ TestResult {
	public:
	// Creates an empty TestResult.
	TestResult();

	// D'tor. Do not inherit from TestResult.
	~TestResult();

	// 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 total_part_count() const;

	// Returns the number of the test properties.
	int test_property_count() const;

	// Returns true iff the test passed (i.e. no test part failed).
	bool Passed() const { return !Failed(); }

	// Returns true iff the test failed.
	bool Failed() const;

	// Returns true iff the test fatally failed.
	bool HasFatalFailure() const;

	// Returns true iff the test has a non-fatal failure.
	bool HasNonfatalFailure() const;

	// Returns the elapsed time, in milliseconds.
	TimeInMillis elapsed_time() const { return elapsed_time_; }

	// Returns the i-th test part result among all the results. i can range
	// from 0 to test_property_count() - 1. If i is not in that range, aborts
	// the program.
	const TestPartResult& GetTestPartResult(int i) const;

	// 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& GetTestProperty(int i) const;

	private:
	friend class TestInfo;
	friend class UnitTest;
	friend class internal::DefaultGlobalTestPartResultReporter;
	friend class internal::ExecDeathTest;
	friend class internal::TestResultAccessor;
	friend class internal::UnitTestImpl;
	friend class internal::WindowsDeathTest;

	// Gets the vector of TestPartResults.
	const std::vector<TestPartResult>& test_part_results() const {
	return test_part_results_;
	}

	// Gets the vector of TestProperties.
	const std::vector<TestProperty>& test_properties() const {
	return test_properties_;
	}

	// Sets the elapsed time.
	void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }

	// Adds a test property to the list. The property is validated and may add
	// a non-fatal failure if invalid (e.g., if it conflicts with reserved
	// key names). If a property is already recorded for the same key, the
	// value will be updated, rather than storing multiple values for the same
	// key.
	void RecordProperty(const TestProperty& test_property);

	// Adds a failure if the key is a reserved attribute of Google Test
	// testcase tags. Returns true if the property is valid.
	// TODO(russr): Validate attribute names are legal and human readable.
	static bool ValidateTestProperty(const TestProperty& test_property);

	// Adds a test part result to the list.
	void AddTestPartResult(const TestPartResult& test_part_result);

	// Returns the death test count.
	int death_test_count() const { return death_test_count_; }

	// Increments the death test count, returning the new count.
	int increment_death_test_count() { return ++death_test_count_; }

	// Clears the test part results.
	void ClearTestPartResults();

	// Clears the object.
	void Clear();

	// Protects mutable state of the property vector and of owned
	// properties, whose values may be updated.
	internal::Mutex test_properites_mutex_;

	// The vector of TestPartResults
	std::vector<TestPartResult> test_part_results_;
	// The vector of TestProperties
	std::vector<TestProperty> test_properties_;
	// Running count of death tests.
	int death_test_count_;
	// The elapsed time, in milliseconds.
	TimeInMillis elapsed_time_;

	// We disallow copying TestResult.
	GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
	}; // class TestResult

	// A TestInfo object stores the following information about a test:
	//
	// Test case name
	// Test name
	// Whether the test should be run
	// A function pointer that creates the test object when invoked
	// Test result
	//
	// The constructor of TestInfo registers itself with the UnitTest
	// singleton such that the RUN_ALL_TESTS() macro knows which tests to
	// run.
	class GTEST_API_ TestInfo {
	public:
	// Destructs a TestInfo object. This function is not virtual, so
	// don't inherit from TestInfo.
	~TestInfo();

	// Returns the test case name.
	const char* test_case_name() const { return test_case_name_.c_str(); }

	// Returns the test name.
	const char* name() const { return name_.c_str(); }

	// Returns the test case comment.
	const char* test_case_comment() const { return test_case_comment_.c_str(); }

	// Returns the test comment.
	const char* comment() const { return comment_.c_str(); }

	// Returns true if this test should run, that is if the test is not disabled
	// (or it is disabled but the also_run_disabled_tests flag has been specified)
	// and its full name matches the user-specified filter.
	//
	// Google Test allows the user to filter the tests by their full names.
	// The full name of a test Bar in test case Foo is defined as
	// "Foo.Bar". Only the tests that match the filter will run.
	//
	// A filter is a colon-separated list of glob (not regex) patterns,
	// optionally followed by a '-' and a colon-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.
	//
	// For example, A:Foo.* is a filter that matches any string that
	// contains the character 'A' or starts with "Foo.".
	bool should_run() const { return should_run_; }

	// Returns the result of the test.
	const TestResult* result() const { return &result_; }

	private:
	#if GTEST_HAS_DEATH_TEST
	friend class internal::DefaultDeathTestFactory;
	#endif // GTEST_HAS_DEATH_TEST
	friend class Test;
	friend class TestCase;
	friend class internal::UnitTestImpl;
	friend TestInfo* internal::MakeAndRegisterTestInfo(
	const char* test_case_name, const char* name,
	const char* test_case_comment, const char* comment,
	internal::TypeId fixture_class_id,
	Test::SetUpTestCaseFunc set_up_tc,
	Test::TearDownTestCaseFunc tear_down_tc,
	internal::TestFactoryBase* factory);

	// Constructs a TestInfo object. The newly constructed instance assumes
	// ownership of the factory object.
	TestInfo(const char* test_case_name, const char* name,
	const char* test_case_comment, const char* comment,
	internal::TypeId fixture_class_id,
	internal::TestFactoryBase* factory);

	// Increments the number of death tests encountered in this test so
	// far.
	int increment_death_test_count() {
	return result_.increment_death_test_count();
	}

	// Creates the test object, runs it, records its result, and then
	// deletes it.
	void Run();

	static void ClearTestResult(TestInfo* test_info) {
	test_info->result_.Clear();
	}

	// These fields are immutable properties of the test.
	const std::string test_case_name_; // Test case name
	const std::string name_; // Test name
	const std::string test_case_comment_; // Test case comment
	const std::string comment_; // Test comment
	const internal::TypeId fixture_class_id_; // ID of the test fixture class
	bool should_run_; // True iff this test should run
	bool is_disabled_; // True iff this test is disabled
	bool matches_filter_; // True if this test matches the
	// user-specified filter.
	internal::TestFactoryBase* const factory_; // The factory that creates
	// the test object

	// This field is mutable and needs to be reset before running the
	// test for the second time.
	TestResult result_;

	GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
	};

	// A test case, which consists of a vector of TestInfos.
	//
	// TestCase is not copyable.
	class GTEST_API_ TestCase {
	public:
	// Creates a TestCase with the given name.
	//
	// TestCase does NOT have a default constructor. Always use this
	// constructor to create a TestCase object.
	//
	// Arguments:
	//
	// name: name of the 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(const char* name, const char* comment,
	Test::SetUpTestCaseFunc set_up_tc,
	Test::TearDownTestCaseFunc tear_down_tc);

	// Destructor of TestCase.
	virtual ~TestCase();

	// Gets the name of the TestCase.
	const char* name() const { return name_.c_str(); }

	// Returns the test case comment.
	const char* comment() const { return comment_.c_str(); }

	// Returns true if any test in this test case should run.
	bool should_run() const { return should_run_; }

	// Gets the number of successful tests in this test case.
	int successful_test_count() const;

	// Gets the number of failed tests in this test case.
	int failed_test_count() const;

	// Gets the number of disabled tests in this test case.
	int disabled_test_count() const;

	// Get the number of tests in this test case that should run.
	int test_to_run_count() const;

	// Gets the number of all tests in this test case.
	int total_test_count() const;

	// Returns true iff the test case passed.
	bool Passed() const { return !Failed(); }

	// Returns true iff the test case failed.
	bool Failed() const { return failed_test_count() > 0; }

	// Returns the elapsed time, in milliseconds.
	TimeInMillis elapsed_time() const { return elapsed_time_; }

	// 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* GetTestInfo(int i) const;

	private:
	friend class Test;
	friend class internal::UnitTestImpl;

	// Gets the (mutable) vector of TestInfos in this TestCase.
	std::vector<TestInfo*>& test_info_list() { return test_info_list_; }

	// Gets the (immutable) vector of TestInfos in this TestCase.
	const std::vector<TestInfo*>& test_info_list() const {
	return test_info_list_;
	}

	// 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* GetMutableTestInfo(int i);

	// Sets the should_run member.
	void set_should_run(bool should) { should_run_ = should; }

	// Adds a TestInfo to this test case. Will delete the TestInfo upon
	// destruction of the TestCase object.
	void AddTestInfo(TestInfo * test_info);

	// Clears the results of all tests in this test case.
	void ClearResult();

	// Clears the results of all tests in the given test case.
	static void ClearTestCaseResult(TestCase* test_case) {
	test_case->ClearResult();
	}

	// Runs every test in this TestCase.
	void Run();

	// Runs SetUpTestCase() for this TestCase. This wrapper is needed
	// for catching exceptions thrown from SetUpTestCase().
	void RunSetUpTestCase() { (*set_up_tc_)(); }

	// Runs TearDownTestCase() for this TestCase. This wrapper is
	// needed for catching exceptions thrown from TearDownTestCase().
	void RunTearDownTestCase() { (*tear_down_tc_)(); }

	// Returns true iff test passed.
	static bool TestPassed(const TestInfo* test_info) {
	return test_info->should_run() && test_info->result()->Passed();
	}

	// Returns true iff test failed.
	static bool TestFailed(const TestInfo* test_info) {
	return test_info->should_run() && test_info->result()->Failed();
	}

	// Returns true iff test is disabled.
	static bool TestDisabled(const TestInfo* test_info) {
	return test_info->is_disabled_;
	}

	// Returns true if the given test should run.
	static bool ShouldRunTest(const TestInfo* test_info) {
	return test_info->should_run();
	}

	// Shuffles the tests in this test case.
	void ShuffleTests(internal::Random* random);

	// Restores the test order to before the first shuffle.
	void UnshuffleTests();

	// Name of the test case.
	internal::String name_;
	// Comment on the test case.
	internal::String comment_;
	// The vector of TestInfos in their original order. It owns the
	// elements in the vector.
	std::vector<TestInfo*> test_info_list_;
	// Provides a level of indirection for the test list to allow easy
	// shuffling and restoring the test order. The i-th element in this
	// vector is the index of the i-th test in the shuffled test list.
	std::vector<int> test_indices_;
	// Pointer to the function that sets up the test case.
	Test::SetUpTestCaseFunc set_up_tc_;
	// Pointer to the function that tears down the test case.
	Test::TearDownTestCaseFunc tear_down_tc_;
	// True iff any test in this test case should run.
	bool should_run_;
	// Elapsed time, in milliseconds.
	TimeInMillis elapsed_time_;

	// We disallow copying TestCases.
	GTEST_DISALLOW_COPY_AND_ASSIGN_(TestCase);
	};

	// An Environment object is capable of setting up and tearing down an
	// environment. The user should subclass this to define his own
	// environment(s).
	//
	// An Environment object does the set-up and tear-down in virtual
	// methods SetUp() and TearDown() instead of the constructor and the
	// destructor, as:
	//
	// 1. You cannot safely throw from a destructor. This is a problem
	// as in some cases Google Test is used where exceptions are enabled, and
	// we may want to implement ASSERT_* using exceptions where they are
	// available.
	// 2. You cannot use ASSERT_* directly in a constructor or
	// destructor.
	class Environment {
	public:
	// The d'tor is virtual as we need to subclass Environment.
	virtual ~Environment() {}

	// Override this to define how to set up the environment.
	virtual void SetUp() {}

	// Override this to define how to tear down the environment.
	virtual void TearDown() {}
	private:
	// If you see an error about overriding the following function or
	// about it being private, you have mis-spelled SetUp() as Setup().
	struct Setup_should_be_spelled_SetUp {};
	virtual Setup_should_be_spelled_SetUp* Setup() { return NULL; }
	};

	// The interface for tracing execution of tests. The methods are organized in
	// the order the corresponding events are fired.
	class TestEventListener {
	public:
	virtual ~TestEventListener() {}

	// Fired before any test activity starts.
	virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;

	// Fired before each iteration of tests starts. There may be more than
	// one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
	// index, starting from 0.
	virtual void OnTestIterationStart(const UnitTest& unit_test,
	int iteration) = 0;

	// Fired before environment set-up for each iteration of tests starts.
	virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;

	// Fired after environment set-up for each iteration of tests ends.
	virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;

	// Fired before the test case starts.
	virtual void OnTestCaseStart(const TestCase& test_case) = 0;

	// Fired before the test starts.
	virtual void OnTestStart(const TestInfo& test_info) = 0;

	// Fired after a failed assertion or a SUCCEED() invocation.
	virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;

	// Fired after the test ends.
	virtual void OnTestEnd(const TestInfo& test_info) = 0;

	// Fired after the test case ends.
	virtual void OnTestCaseEnd(const TestCase& test_case) = 0;

	// Fired before environment tear-down for each iteration of tests starts.
	virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;

	// Fired after environment tear-down for each iteration of tests ends.
	virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;

	// Fired after each iteration of tests finishes.
	virtual void OnTestIterationEnd(const UnitTest& unit_test,
	int iteration) = 0;

	// Fired after all test activities have ended.
	virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
	};

	// The convenience class for users who need to override just one or two
	// methods and are not concerned that a possible change to a signature of
	// the methods they override will not be caught during the build. For
	// comments about each method please see the definition of TestEventListener
	// above.
	class EmptyTestEventListener : public TestEventListener {
	public:
	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& /test_part_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/) {}
	};

	// TestEventListeners lets users add listeners to track events in Google Test.
	class GTEST_API_ TestEventListeners {
	public:
	TestEventListeners();
	~TestEventListeners();

	// Appends an event listener to the end of the list. Google Test assumes
	// the ownership of the listener (i.e. it will delete the listener when
	// the test program finishes).
	void Append(TestEventListener* 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* Release(TestEventListener* listener);

	// 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 caller and makes this
	// function return NULL the next time.
	TestEventListener* default_result_printer() const {
	return default_result_printer_;
	}

	// Returns the standard listener responsible for the default XML output
	// controlled by the --gtest_output=xml flag. Can be removed from the
	// listeners list by users who want to shut down the default XML output
	// controlled by this flag and substitute it with custom one. Note that
	// removing this object from the listener list with Release transfers its
	// ownership to the caller and makes this function return NULL the next
	// time.
	TestEventListener* default_xml_generator() const {
	return default_xml_generator_;
	}

	private:
	friend class TestCase;
	friend class TestInfo;
	friend class internal::DefaultGlobalTestPartResultReporter;
	friend class internal::NoExecDeathTest;
	friend class internal::TestEventListenersAccessor;
	friend class internal::UnitTestImpl;

	// Returns repeater that broadcasts the TestEventListener events to all
	// subscribers.
	TestEventListener* 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 SetDefaultResultPrinter(TestEventListener* 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 SetDefaultXmlGenerator(TestEventListener* listener);

	// Controls whether events will be forwarded by the repeater to the
	// listeners in the list.
	bool EventForwardingEnabled() const;
	void SuppressEventForwarding();

	// The actual list of listeners.
	internal::TestEventRepeater* repeater_;
	// Listener responsible for the standard result output.
	TestEventListener* default_result_printer_;
	// Listener responsible for the creation of the XML output file.
	TestEventListener* default_xml_generator_;

	// We disallow copying TestEventListeners.
	GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
	};

	// A UnitTest consists of a vector of TestCases.
	//
	// This is a singleton class. The only instance of UnitTest is
	// created when UnitTest::GetInstance() is first called. This
	// instance is never deleted.
	//
	// UnitTest is not copyable.
	//
	// This class is thread-safe as long as the methods are called
	// according to their specification.
	class GTEST_API_ UnitTest {
	public:
	// 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.
	static UnitTest* GetInstance();

	// Runs all tests in this UnitTest object and prints the result.
	// Returns 0 if successful, or 1 otherwise.
	//
	// This method can only be called from the main thread.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	int Run() GTEST_MUST_USE_RESULT_;

	// Returns the working directory when the first TEST() or TEST_F()
	// was executed. The UnitTest object owns the string.
	const char* original_working_dir() const;

	// Returns the TestCase object for the test that's currently running,
	// or NULL if no test is running.
	const TestCase* current_test_case() const;

	// Returns the TestInfo object for the test that's currently running,
	// or NULL if no test is running.
	const TestInfo* current_test_info() const;

	// Returns the random seed used at the start of the current test run.
	int random_seed() const;

	#if GTEST_HAS_PARAM_TEST
	// Returns the ParameterizedTestCaseRegistry object used to keep track of
	// value-parameterized tests and instantiate and register them.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	internal::ParameterizedTestCaseRegistry& parameterized_test_registry();
	#endif // GTEST_HAS_PARAM_TEST

	// Gets the number of successful test cases.
	int successful_test_case_count() const;

	// Gets the number of failed test cases.
	int failed_test_case_count() const;

	// Gets the number of all test cases.
	int total_test_case_count() const;

	// Gets the number of all test cases that contain at least one test
	// that should run.
	int test_case_to_run_count() const;

	// Gets the number of successful tests.
	int successful_test_count() const;

	// Gets the number of failed tests.
	int failed_test_count() const;

	// Gets the number of disabled tests.
	int disabled_test_count() const;

	// Gets the number of all tests.
	int total_test_count() const;

	// Gets the number of tests that should run.
	int test_to_run_count() const;

	// Gets the elapsed time, in milliseconds.
	TimeInMillis elapsed_time() const;

	// Returns true iff the unit test passed (i.e. all test cases passed).
	bool Passed() const;

	// Returns true iff the unit test failed (i.e. some test case failed
	// or something outside of all tests failed).
	bool Failed() const;

	// 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* GetTestCase(int i) const;

	// Returns the list of event listeners that can be used to track events
	// inside Google Test.
	TestEventListeners& listeners();

	private:
	// 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.
	//
	// This method can only be called from the main thread.
	Environment* AddEnvironment(Environment* 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 AddTestPartResult(TestPartResult::Type result_type,
	const char* file_name,
	int line_number,
	const internal::String& message,
	const internal::String& os_stack_trace);

	// Adds a TestProperty to the current TestResult object. If the result already
	// contains a property with the same key, the value will be updated.
	void RecordPropertyForCurrentTest(const char* key, const char* value);

	// 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* GetMutableTestCase(int i);

	// Accessors for the implementation object.
	internal::UnitTestImpl* impl() { return impl_; }
	const internal::UnitTestImpl* impl() const { return impl_; }

	// These classes and funcions are friends as they need to access private
	// members of UnitTest.
	friend class Test;
	friend class internal::AssertHelper;
	friend class internal::ScopedTrace;
	friend Environment* AddGlobalTestEnvironment(Environment* env);
	friend internal::UnitTestImpl* internal::GetUnitTestImpl();
	friend void internal::ReportFailureInUnknownLocation(
	TestPartResult::Type result_type,
	const internal::String& message);

	// Creates an empty UnitTest.
	UnitTest();

	// D'tor
	virtual ~UnitTest();

	// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
	// Google Test trace stack.
	void PushGTestTrace(const internal::TraceInfo& trace);

	// Pops a trace from the per-thread Google Test trace stack.
	void PopGTestTrace();

	// Protects mutable state in *impl_. This is mutable as some const
	// methods need to lock it too.
	mutable internal::Mutex mutex_;

	// Opaque implementation object. This field is never changed once
	// the object is constructed. We don't mark it as const here, as
	// doing so will cause a warning in the constructor of UnitTest.
	// Mutable state in *impl_ is protected by mutex_.
	internal::UnitTestImpl* impl_;

	// We disallow copying UnitTest.
	GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
	};

	// A convenient wrapper for adding an environment for the test
	// program.
	//
	// You should call this before RUN_ALL_TESTS() is called, probably in
	// main(). If you use gtest_main, you need to call this before main()
	// starts for it to take effect. For example, you can define a global
	// variable like this:
	//
	// testing::Environment* const foo_env =
	// testing::AddGlobalTestEnvironment(new FooEnvironment);
	//
	// However, we strongly recommend you to write your own main() and
	// call AddGlobalTestEnvironment() there, as relying on initialization
	// of global variables makes the code harder to read and may cause
	// problems when you register multiple environments from different
	// translation units and the environments have dependencies among them
	// (remember that the compiler doesn't guarantee the order in which
	// global variables from different translation units are initialized).
	inline Environment* AddGlobalTestEnvironment(Environment* env) {
	return UnitTest::GetInstance()->AddEnvironment(env);
	}

	// 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.
	GTEST_API_ void InitGoogleTest(int* argc, char** argv);

	// This overloaded version can be used in Windows programs compiled in
	// UNICODE mode.
	GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);

	namespace internal {

	// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
	// operand to be used in a failure message. The type (but not value)
	// of the other operand may affect the format. This allows us to
	// print a char* as a raw pointer when it is compared against another
	// char*, and print it as a C string when it is compared against an
	// std::string object, for example.
	//
	// The default implementation ignores the type of the other operand.
	// Some specialized versions are used to handle formatting wide or
	// narrow C strings.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	template <typename T1, typename T2>
	String FormatForComparisonFailureMessage(const T1& value,
	const T2& /* other_operand */) {
	return PrintToString(value);
	}

	// The helper function for {ASSERT\|EXPECT}_EQ.
	template <typename T1, typename T2>
	AssertionResult CmpHelperEQ(const char* expected_expression,
	const char* actual_expression,
	const T1& expected,
	const T2& actual) {
	#ifdef _MSC_VER
	#pragma warning(push) // Saves the current warning state.
	#pragma warning(disable:4389) // Temporarily disables warning on
	// signed/unsigned mismatch.
	#endif

	if (expected == actual) {
	return AssertionSuccess();
	}

	#ifdef _MSC_VER
	#pragma warning(pop) // Restores the warning state.
	#endif

	return EqFailure(expected_expression,
	actual_expression,
	FormatForComparisonFailureMessage(expected, actual),
	FormatForComparisonFailureMessage(actual, expected),
	false);
	}

	// With this overloaded version, we allow anonymous enums to be used
	// in {ASSERT\|EXPECT}_EQ when compiled with gcc 4, as anonymous enums
	// can be implicitly cast to BiggestInt.
	GTEST_API_ AssertionResult CmpHelperEQ(const char* expected_expression,
	const char* actual_expression,
	BiggestInt expected,
	BiggestInt actual);

	// The helper class for {ASSERT\|EXPECT}_EQ. The template argument
	// lhs_is_null_literal is true iff the first argument to ASSERT_EQ()
	// is a null pointer literal. The following default implementation is
	// for lhs_is_null_literal being false.
	template <bool lhs_is_null_literal>
	class EqHelper {
	public:
	// This templatized version is for the general case.
	template <typename T1, typename T2>
	static AssertionResult Compare(const char* expected_expression,
	const char* actual_expression,
	const T1& expected,
	const T2& actual) {
	return CmpHelperEQ(expected_expression, actual_expression, expected,
	actual);
	}

	// With this overloaded version, we allow anonymous enums to be used
	// in {ASSERT\|EXPECT}_EQ when compiled with gcc 4, as anonymous
	// enums can be implicitly cast to BiggestInt.
	//
	// Even though its body looks the same as the above version, we
	// cannot merge the two, as it will make anonymous enums unhappy.
	static AssertionResult Compare(const char* expected_expression,
	const char* actual_expression,
	BiggestInt expected,
	BiggestInt actual) {
	return CmpHelperEQ(expected_expression, actual_expression, expected,
	actual);
	}
	};

	// This specialization is used when the first argument to ASSERT_EQ()
	// is a null pointer literal.
	template <>
	class EqHelper<true> {
	public:
	// We define two overloaded versions of Compare(). The first
	// version will be picked when the second argument to ASSERT_EQ() is
	// NOT a pointer, e.g. ASSERT_EQ(0, AnIntFunction()) or
	// EXPECT_EQ(false, a_bool).
	template <typename T1, typename T2>
	static AssertionResult Compare(const char* expected_expression,
	const char* actual_expression,
	const T1& expected,
	const T2& actual) {
	return CmpHelperEQ(expected_expression, actual_expression, expected,
	actual);
	}

	// This version will be picked when the second argument to
	// ASSERT_EQ() is a pointer, e.g. ASSERT_EQ(NULL, a_pointer).
	template <typename T1, typename T2>
	static AssertionResult Compare(const char* expected_expression,
	const char* actual_expression,
	const T1& /* expected */,
	T2* actual) {
	// We already know that 'expected' is a null pointer.
	return CmpHelperEQ(expected_expression, actual_expression,
	static_cast<T2*>(NULL), actual);
	}
	};

	// A macro for implementing the helper functions needed to implement
	// ASSERT_?? and EXPECT_??. It is here just to avoid copy-and-paste
	// of similar code.
	//
	// For each templatized helper function, we also define an overloaded
	// version for BiggestInt in order to reduce code bloat and allow
	// anonymous enums to be used with {ASSERT\|EXPECT}_?? when compiled
	// with gcc 4.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
	template <typename T1, typename T2>\
	AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
	const T1& val1, const T2& val2) {\
	if (val1 op val2) {\
	return AssertionSuccess();\
	} else {\
	Message msg;\
	msg << "Expected: (" << expr1 << ") " #op " (" << expr2\
	<< "), actual: " << FormatForComparisonFailureMessage(val1, val2)\
	<< " vs " << FormatForComparisonFailureMessage(val2, val1);\
	return AssertionFailure(msg);\
	}\
	}\
	GTEST_API_ AssertionResult CmpHelper##op_name(\
	const char* expr1, const char* expr2, BiggestInt val1, BiggestInt val2)

	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.

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

	#undef GTEST_IMPL_CMP_HELPER_

	// The helper function for {ASSERT\|EXPECT}_STREQ.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTREQ(const char* expected_expression,
	const char* actual_expression,
	const char* expected,
	const char* actual);

	// The helper function for {ASSERT\|EXPECT}_STRCASEEQ.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* expected_expression,
	const char* actual_expression,
	const char* expected,
	const char* actual);

	// The helper function for {ASSERT\|EXPECT}_STRNE.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
	const char* s2_expression,
	const char* s1,
	const char* s2);

	// The helper function for {ASSERT\|EXPECT}_STRCASENE.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
	const char* s2_expression,
	const char* s1,
	const char* s2);


	// Helper function for *_STREQ on wide strings.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTREQ(const char* expected_expression,
	const char* actual_expression,
	const wchar_t* expected,
	const wchar_t* actual);

	// Helper function for *_STRNE on wide strings.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
	const char* s2_expression,
	const wchar_t* s1,
	const wchar_t* s2);

	} // namespace internal

	// IsSubstring() and IsNotSubstring() are intended to be used as the
	// first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
	// themselves. They 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.
	//
	// The {needle,haystack}_expr arguments are the stringified
	// expressions that generated the two real arguments.
	GTEST_API_ AssertionResult IsSubstring(
	const char* needle_expr, const char* haystack_expr,
	const char* needle, const char* haystack);
	GTEST_API_ AssertionResult IsSubstring(
	const char* needle_expr, const char* haystack_expr,
	const wchar_t* needle, const wchar_t* haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	const char* needle_expr, const char* haystack_expr,
	const char* needle, const char* haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	const char* needle_expr, const char* haystack_expr,
	const wchar_t* needle, const wchar_t* haystack);
	GTEST_API_ AssertionResult IsSubstring(
	const char* needle_expr, const char* haystack_expr,
	const ::std::string& needle, const ::std::string& haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	const char* needle_expr, const char* haystack_expr,
	const ::std::string& needle, const ::std::string& haystack);

	#if GTEST_HAS_STD_WSTRING
	GTEST_API_ AssertionResult IsSubstring(
	const char* needle_expr, const char* haystack_expr,
	const ::std::wstring& needle, const ::std::wstring& haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	const char* needle_expr, const char* haystack_expr,
	const ::std::wstring& needle, const ::std::wstring& haystack);
	#endif // GTEST_HAS_STD_WSTRING

	namespace internal {

	// Helper template function for comparing floating-points.
	//
	// Template parameter:
	//
	// RawType: the raw floating-point type (either float or double)
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	template <typename RawType>
	AssertionResult CmpHelperFloatingPointEQ(const char* expected_expression,
	const char* actual_expression,
	RawType expected,
	RawType actual) {
	const FloatingPoint<RawType> lhs(expected), rhs(actual);

	if (lhs.AlmostEquals(rhs)) {
	return AssertionSuccess();
	}

	StrStream expected_ss;
	expected_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
	<< expected;

	StrStream actual_ss;
	actual_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
	<< actual;

	return EqFailure(expected_expression,
	actual_expression,
	StrStreamToString(&expected_ss),
	StrStreamToString(&actual_ss),
	false);
	}

	// Helper function for implementing ASSERT_NEAR.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
	const char* expr2,
	const char* abs_error_expr,
	double val1,
	double val2,
	double abs_error);

	// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
	// A class that enables one to stream messages to assertion macros
	class GTEST_API_ AssertHelper {
	public:
	// Constructor.
	AssertHelper(TestPartResult::Type type,
	const char* file,
	int line,
	const char* message);
	~AssertHelper();

	// Message assignment is a semantic trick to enable assertion
	// streaming; see the GTEST_MESSAGE_ macro below.
	void operator=(const Message& message) const;

	private:
	// We put our data in a struct so that the size of the AssertHelper class can
	// be as small as possible. This is important because gcc is incapable of
	// re-using stack space even for temporary variables, so every EXPECT_EQ
	// reserves stack space for another AssertHelper.
	struct AssertHelperData {
	AssertHelperData(TestPartResult::Type t,
	const char* srcfile,
	int line_num,
	const char* msg)
	: type(t), file(srcfile), line(line_num), message(msg) { }

	TestPartResult::Type const type;
	const char* const file;
	int const line;
	String const message;

	private:
	GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
	};

	AssertHelperData* const data_;

	GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
	};

	} // namespace internal

	#if GTEST_HAS_PARAM_TEST
	// The abstract base class that all value-parameterized tests inherit from.
	//
	// This class adds support for accessing the test parameter value via
	// the GetParam() method.
	//
	// Use it with one of the parameter generator defining functions, like Range(),
	// Values(), ValuesIn(), Bool(), and Combine().
	//
	// class FooTest : public ::testing::TestWithParam<int> {
	// protected:
	// FooTest() {
	// // Can use GetParam() here.
	// }
	// virtual ~FooTest() {
	// // Can use GetParam() here.
	// }
	// virtual void SetUp() {
	// // Can use GetParam() here.
	// }
	// virtual void TearDown {
	// // Can use GetParam() here.
	// }
	// };
	// TEST_P(FooTest, DoesBar) {
	// // Can use GetParam() method here.
	// Foo foo;
	// ASSERT_TRUE(foo.DoesBar(GetParam()));
	// }
	// INSTANTIATE_TEST_CASE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));

	template <typename T>
	class TestWithParam : public Test {
	public:
	typedef T ParamType;

	// The current parameter value. Is also available in the test fixture's
	// constructor.
	const ParamType& GetParam() const { return *parameter_; }

	private:
	// Sets parameter value. The caller is responsible for making sure the value
	// remains alive and unchanged throughout the current test.
	static void SetParam(const ParamType* parameter) {
	parameter_ = parameter;
	}

	// Static value used for accessing parameter during a test lifetime.
	static const ParamType* parameter_;

	// TestClass must be a subclass of TestWithParam<T>.
	template <class TestClass> friend class internal::ParameterizedTestFactory;
	};

	template <typename T>
	const T* TestWithParam<T>::parameter_ = NULL;

	#endif // GTEST_HAS_PARAM_TEST

	// Macros for indicating success/failure in test code.

	// ADD_FAILURE unconditionally adds a failure to the current test.
	// SUCCEED generates a success - it doesn't automatically make the
	// current test successful, as a test is only successful when it has
	// no failure.
	//
	// EXPECT_* verifies that a certain condition is satisfied. If not,
	// it behaves like ADD_FAILURE. In particular:
	//
	// EXPECT_TRUE verifies that a Boolean condition is true.
	// EXPECT_FALSE verifies that a Boolean condition is false.
	//
	// FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
	// that they will also abort the current function on failure. People
	// usually want the fail-fast behavior of FAIL and ASSERT_*, but those
	// writing data-driven tests often find themselves using ADD_FAILURE
	// and EXPECT_* more.
	//
	// Examples:
	//
	// EXPECT_TRUE(server.StatusIsOK());
	// ASSERT_FALSE(server.HasPendingRequest(port))
	// << "There are still pending requests " << "on port " << port;

	// Generates a nonfatal failure with a generic message.
	#define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")

	// Generates a nonfatal failure at the given source file location with
	// a generic message.
	#define ADD_FAILURE_AT(file, line) \
	GTEST_MESSAGE_AT_(file, line, "Failed", \
	::testing::TestPartResult::kNonFatalFailure)

	// Generates a fatal failure with a generic message.
	#define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")

	// Define this macro to 1 to omit the definition of FAIL(), which is a
	// generic name and clashes with some other libraries.
	#if !GTEST_DONT_DEFINE_FAIL
	#define FAIL() GTEST_FAIL()
	#endif

	// Generates a success with a generic message.
	#define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")

	// Define this macro to 1 to omit the definition of SUCCEED(), which
	// is a generic name and clashes with some other libraries.
	#if !GTEST_DONT_DEFINE_SUCCEED
	#define SUCCEED() GTEST_SUCCEED()
	#endif

	// Macros for testing exceptions.
	//
	// * {ASSERT\|EXPECT}_THROW(statement, expected_exception):
	// Tests that the statement throws the expected exception.
	// * {ASSERT\|EXPECT}_NO_THROW(statement):
	// Tests that the statement doesn't throw any exception.
	// * {ASSERT\|EXPECT}_ANY_THROW(statement):
	// Tests that the statement throws an exception.

	#define EXPECT_THROW(statement, expected_exception) \
	GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
	#define EXPECT_NO_THROW(statement) \
	GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
	#define EXPECT_ANY_THROW(statement) \
	GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
	#define ASSERT_THROW(statement, expected_exception) \
	GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
	#define ASSERT_NO_THROW(statement) \
	GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
	#define ASSERT_ANY_THROW(statement) \
	GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)

	// Boolean assertions. Condition can be either a Boolean expression or an
	// AssertionResult. For more information on how to use AssertionResult with
	// these macros see comments on that class.
	#define EXPECT_TRUE(condition) \
	GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
	GTEST_NONFATAL_FAILURE_)
	#define EXPECT_FALSE(condition) \
	GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
	GTEST_NONFATAL_FAILURE_)
	#define ASSERT_TRUE(condition) \
	GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
	GTEST_FATAL_FAILURE_)
	#define ASSERT_FALSE(condition) \
	GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
	GTEST_FATAL_FAILURE_)

	// Includes the auto-generated header that implements a family of
	// generic predicate assertion macros.
	#include <gtest/gtest_pred_impl.h>

	// Macros for testing equalities and inequalities.
	//
	// * {ASSERT\|EXPECT}_EQ(expected, actual): Tests that expected == actual
	// * {ASSERT\|EXPECT}_NE(v1, v2): Tests that v1 != v2
	// * {ASSERT\|EXPECT}_LT(v1, v2): Tests that v1 < v2
	// * {ASSERT\|EXPECT}_LE(v1, v2): Tests that v1 <= v2
	// * {ASSERT\|EXPECT}_GT(v1, v2): Tests that v1 > v2
	// * {ASSERT\|EXPECT}_GE(v1, v2): Tests that v1 >= v2
	//
	// When they are not, Google Test prints both the tested expressions and
	// their actual values. The values must be compatible built-in types,
	// or you will get a compiler error. By "compatible" we mean that the
	// values can be compared by the respective operator.
	//
	// Note:
	//
	// 1. It is possible to make a user-defined type work with
	// {ASSERT\|EXPECT}_??(), but that requires overloading the
	// comparison operators and is thus discouraged by the Google C++
	// Usage Guide. Therefore, you are advised to use the
	// {ASSERT\|EXPECT}_TRUE() macro to assert that two objects are
	// equal.
	//
	// 2. The {ASSERT\|EXPECT}_??() macros do pointer comparisons on
	// pointers (in particular, C strings). Therefore, if you use it
	// with two C strings, you are testing how their locations in memory
	// are related, not how their content is related. To compare two C
	// strings by content, use {ASSERT\|EXPECT}_STR*().
	//
	// 3. {ASSERT\|EXPECT}_EQ(expected, actual) is preferred to
	// {ASSERT\|EXPECT}_TRUE(expected == actual), as the former tells you
	// what the actual value is when it fails, and similarly for the
	// other comparisons.
	//
	// 4. Do not depend on the order in which {ASSERT\|EXPECT}_??()
	// evaluate their arguments, which is undefined.
	//
	// 5. These macros evaluate their arguments exactly once.
	//
	// Examples:
	//
	// EXPECT_NE(5, Foo());
	// EXPECT_EQ(NULL, a_pointer);
	// ASSERT_LT(i, array_size);
	// ASSERT_GT(records.size(), 0) << "There is no record left.";

	#define EXPECT_EQ(expected, actual) \
	EXPECT_PRED_FORMAT2(::testing::internal:: \
	EqHelper<GTEST_IS_NULL_LITERAL_(expected)>::Compare, \
	expected, actual)
	#define EXPECT_NE(expected, actual) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, expected, actual)
	#define EXPECT_LE(val1, val2) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
	#define EXPECT_LT(val1, val2) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
	#define EXPECT_GE(val1, val2) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
	#define EXPECT_GT(val1, val2) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)

	#define ASSERT_EQ(expected, actual) \
	ASSERT_PRED_FORMAT2(::testing::internal:: \
	EqHelper<GTEST_IS_NULL_LITERAL_(expected)>::Compare, \
	expected, actual)
	#define ASSERT_NE(val1, val2) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
	#define ASSERT_LE(val1, val2) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
	#define ASSERT_LT(val1, val2) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
	#define ASSERT_GE(val1, val2) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
	#define ASSERT_GT(val1, val2) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)

	// C String Comparisons. All tests treat NULL and any non-NULL string
	// as different. Two NULLs are equal.
	//
	// * {ASSERT\|EXPECT}_STREQ(s1, s2): Tests that s1 == s2
	// * {ASSERT\|EXPECT}_STRNE(s1, s2): Tests that s1 != s2
	// * {ASSERT\|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
	// * {ASSERT\|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
	//
	// For wide or narrow string objects, you can use the
	// {ASSERT\|EXPECT}_??() macros.
	//
	// Don't depend on the order in which the arguments are evaluated,
	// which is undefined.
	//
	// These macros evaluate their arguments exactly once.

	#define EXPECT_STREQ(expected, actual) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, expected, actual)
	#define EXPECT_STRNE(s1, s2) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
	#define EXPECT_STRCASEEQ(expected, actual) \
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, expected, actual)
	#define EXPECT_STRCASENE(s1, s2)\
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)

	#define ASSERT_STREQ(expected, actual) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, expected, actual)
	#define ASSERT_STRNE(s1, s2) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
	#define ASSERT_STRCASEEQ(expected, actual) \
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, expected, actual)
	#define ASSERT_STRCASENE(s1, s2)\
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)

	// Macros for comparing floating-point numbers.
	//
	// * {ASSERT\|EXPECT}_FLOAT_EQ(expected, actual):
	// Tests that two float values are almost equal.
	// * {ASSERT\|EXPECT}_DOUBLE_EQ(expected, actual):
	// Tests that two double values are almost equal.
	// * {ASSERT\|EXPECT}_NEAR(v1, v2, abs_error):
	// Tests that v1 and v2 are within the given distance to each other.
	//
	// Google Test uses ULP-based comparison to automatically pick a default
	// error bound that is appropriate for the operands. See the
	// FloatingPoint template class in gtest-internal.h if you are
	// interested in the implementation details.

	#define EXPECT_FLOAT_EQ(expected, actual)\
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
	expected, actual)

	#define EXPECT_DOUBLE_EQ(expected, actual)\
	EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
	expected, actual)

	#define ASSERT_FLOAT_EQ(expected, actual)\
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
	expected, actual)

	#define ASSERT_DOUBLE_EQ(expected, actual)\
	ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
	expected, actual)

	#define EXPECT_NEAR(val1, val2, abs_error)\
	EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
	val1, val2, abs_error)

	#define ASSERT_NEAR(val1, val2, abs_error)\
	ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
	val1, val2, abs_error)

	// These predicate format functions work on floating-point values, and
	// can be used in {ASSERT\|EXPECT}_PRED_FORMAT2*(), e.g.
	//
	// EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);

	// Asserts that val1 is less than, or almost equal to, val2. Fails
	// otherwise. In particular, it fails if either val1 or val2 is NaN.
	GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
	float val1, float val2);
	GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
	double val1, double val2);


	#if GTEST_OS_WINDOWS

	// Macros that test for HRESULT failure and success, these are only useful
	// on Windows, and rely on Windows SDK macros and APIs to compile.
	//
	// * {ASSERT\|EXPECT}_HRESULT_{SUCCEEDED\|FAILED}(expr)
	//
	// When expr unexpectedly fails or succeeds, Google Test prints the
	// expected result and the actual result with both a human-readable
	// string representation of the error, if available, as well as the
	// hex result code.
	#define EXPECT_HRESULT_SUCCEEDED(expr) \
	EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))

	#define ASSERT_HRESULT_SUCCEEDED(expr) \
	ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))

	#define EXPECT_HRESULT_FAILED(expr) \
	EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))

	#define ASSERT_HRESULT_FAILED(expr) \
	ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))

	#endif // GTEST_OS_WINDOWS

	// Macros that execute statement and check that it doesn't generate new fatal
	// failures in the current thread.
	//
	// * {ASSERT\|EXPECT}_NO_FATAL_FAILURE(statement);
	//
	// Examples:
	//
	// EXPECT_NO_FATAL_FAILURE(Process());
	// ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
	//
	#define ASSERT_NO_FATAL_FAILURE(statement) \
	GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
	#define EXPECT_NO_FATAL_FAILURE(statement) \
	GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)

	// Causes a trace (including the source file path, the current line
	// number, and the given message) to be included in every test failure
	// message generated by code in the current scope. The effect is
	// undone when the control leaves the current scope.
	//
	// The message argument can be anything streamable to std::ostream.
	//
	// In the implementation, we include the current line number as part
	// of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
	// to appear in the same block - as long as they are on different
	// lines.
	#define SCOPED_TRACE(message) \
	::testing::internal::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
	__FILE__, __LINE__, ::testing::Message() << (message))

	// Compile-time assertion for type equality.
	// StaticAssertTypeEq<type1, type2>() compiles iff type1 and type2 are
	// the same type. The value it returns is not interesting.
	//
	// Instead of making StaticAssertTypeEq a class template, we make it a
	// function template that invokes a helper class template. This
	// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
	// defining objects of that type.
	//
	// CAVEAT:
	//
	// When used inside a method of a class template,
	// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
	// instantiated. For example, given:
	//
	// template <typename T> class Foo {
	// public:
	// void Bar() { testing::StaticAssertTypeEq<int, T>(); }
	// };
	//
	// the code:
	//
	// void Test1() { Foo<bool> foo; }
	//
	// will NOT generate a compiler error, as Foo<bool>::Bar() is never
	// actually instantiated. Instead, you need:
	//
	// void Test2() { Foo<bool> foo; foo.Bar(); }
	//
	// to cause a compiler error.
	template <typename T1, typename T2>
	bool StaticAssertTypeEq() {
	(void)internal::StaticAssertTypeEqHelper<T1, T2>();
	return true;
	}

	// Defines a test.
	//
	// The first parameter is the name of the test case, and the second
	// parameter is the name of the test within the test case.
	//
	// The convention is to end the test case name with "Test". For
	// example, a test case for the Foo class can be named FooTest.
	//
	// The user should put his test code between braces after using this
	// macro. Example:
	//
	// TEST(FooTest, InitializesCorrectly) {
	// Foo foo;
	// EXPECT_TRUE(foo.StatusIsOK());
	// }

	// Note that we call GetTestTypeId() instead of GetTypeId<
	// ::testing::Test>() here 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 Google Test
	// framework.
	#define GTEST_TEST(test_case_name, test_name)\
	GTEST_TEST_(test_case_name, test_name, \
	::testing::Test, ::testing::internal::GetTestTypeId())

	// Define this macro to 1 to omit the definition of TEST(), which
	// is a generic name and clashes with some other libraries.
	#if !GTEST_DONT_DEFINE_TEST
	#define TEST(test_case_name, test_name) GTEST_TEST(test_case_name, test_name)
	#endif

	// Defines a test that uses a test fixture.
	//
	// The first parameter is the name of the test fixture class, which
	// also doubles as the test case name. The second parameter is the
	// name of the test within the test case.
	//
	// A test fixture class must be declared earlier. The user should put
	// his test code between braces after using this macro. Example:
	//
	// class FooTest : public testing::Test {
	// protected:
	// virtual void SetUp() { b_.AddElement(3); }
	//
	// Foo a_;
	// Foo b_;
	// };
	//
	// TEST_F(FooTest, InitializesCorrectly) {
	// EXPECT_TRUE(a_.StatusIsOK());
	// }
	//
	// TEST_F(FooTest, ReturnsElementCountCorrectly) {
	// EXPECT_EQ(0, a_.size());
	// EXPECT_EQ(1, b_.size());
	// }

	#define TEST_F(test_fixture, test_name)\
	GTEST_TEST_(test_fixture, test_name, test_fixture, \
	::testing::internal::GetTypeId<test_fixture>())

	// Use this macro in main() to run all tests. It returns 0 if all
	// tests are successful, or 1 otherwise.
	//
	// RUN_ALL_TESTS() should be invoked after the command line has been
	// parsed by InitGoogleTest().

	#define RUN_ALL_TESTS()\
	(::testing::UnitTest::GetInstance()->Run())

	} // namespace testing

	#endif // GTEST_INCLUDE_GTEST_GTEST_H_

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