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googletest-param-test-test.cc
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googletest-param-test-test.cc
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			// Copyright 2008, 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.

			//
			// Tests for Google Test itself. This file verifies that the parameter
			// generators objects produce correct parameter sequences and that
			// Google Test runtime instantiates correct tests from those sequences.

			#include "gtest/gtest.h"

			# include <algorithm>
			# include <iostream>
			# include <list>
			# include <set>
			# include <sstream>
			# include <string>
			# include <vector>

			# include "src/gtest-internal-inl.h" // for UnitTestOptions
			# include "test/googletest-param-test-test.h"

			using ::std::vector;
			using ::std::sort;

			using ::testing::AddGlobalTestEnvironment;
			using ::testing::Bool;
			using ::testing::Combine;
			using ::testing::Message;
			using ::testing::Range;
			using ::testing::TestWithParam;
			using ::testing::Values;
			using ::testing::ValuesIn;

			using ::testing::internal::ParamGenerator;
			using ::testing::internal::UnitTestOptions;

			// Prints a value to a string.
			//
			// FIXME: remove PrintValue() when we move matchers and
			// EXPECT_THAT() from Google Mock to Google Test. At that time, we
			// can write EXPECT_THAT(x, Eq(y)) to compare two tuples x and y, as
			// EXPECT_THAT() and the matchers know how to print tuples.
			template <typename T>
			::std::string PrintValue(const T& value) {
			return testing::PrintToString(value);
			}

			// Verifies that a sequence generated by the generator and accessed
			// via the iterator object matches the expected one using Google Test
			// assertions.
			template <typename T, size_t N>
			void VerifyGenerator(const ParamGenerator<T>& generator,
			const T (&expected_values)[N]) {
			typename ParamGenerator<T>::iterator it = generator.begin();
			for (size_t i = 0; i < N; ++i) {
			ASSERT_FALSE(it == generator.end())
			<< "At element " << i << " when accessing via an iterator "
			<< "created with the copy constructor.\n";
			// We cannot use EXPECT_EQ() here as the values may be tuples,
			// which don't support <<.
			EXPECT_TRUE(expected_values[i] == *it)
			<< "where i is " << i
			<< ", expected_values[i] is " << PrintValue(expected_values[i])
			<< ", it is " << PrintValue(it)
			<< ", and 'it' is an iterator created with the copy constructor.\n";
			++it;
			}
			EXPECT_TRUE(it == generator.end())
			<< "At the presumed end of sequence when accessing via an iterator "
			<< "created with the copy constructor.\n";

			// Test the iterator assignment. The following lines verify that
			// the sequence accessed via an iterator initialized via the
			// assignment operator (as opposed to a copy constructor) matches
			// just the same.
			it = generator.begin();
			for (size_t i = 0; i < N; ++i) {
			ASSERT_FALSE(it == generator.end())
			<< "At element " << i << " when accessing via an iterator "
			<< "created with the assignment operator.\n";
			EXPECT_TRUE(expected_values[i] == *it)
			<< "where i is " << i
			<< ", expected_values[i] is " << PrintValue(expected_values[i])
			<< ", it is " << PrintValue(it)
			<< ", and 'it' is an iterator created with the copy constructor.\n";
			++it;
			}
			EXPECT_TRUE(it == generator.end())
			<< "At the presumed end of sequence when accessing via an iterator "
			<< "created with the assignment operator.\n";
			}

			template <typename T>
			void VerifyGeneratorIsEmpty(const ParamGenerator<T>& generator) {
			typename ParamGenerator<T>::iterator it = generator.begin();
			EXPECT_TRUE(it == generator.end());

			it = generator.begin();
			EXPECT_TRUE(it == generator.end());
			}

			// Generator tests. They test that each of the provided generator functions
			// generates an expected sequence of values. The general test pattern
			// instantiates a generator using one of the generator functions,
			// checks the sequence produced by the generator using its iterator API,
			// and then resets the iterator back to the beginning of the sequence
			// and checks the sequence again.

			// Tests that iterators produced by generator functions conform to the
			// ForwardIterator concept.
			TEST(IteratorTest, ParamIteratorConformsToForwardIteratorConcept) {
			const ParamGenerator<int> gen = Range(0, 10);
			ParamGenerator<int>::iterator it = gen.begin();

			// Verifies that iterator initialization works as expected.
			ParamGenerator<int>::iterator it2 = it;
			EXPECT_TRUE(it == it2) << "Initialized iterators must point to the "
			<< "element same as its source points to";

			// Verifies that iterator assignment works as expected.
			++it;
			EXPECT_FALSE(it == it2);
			it2 = it;
			EXPECT_TRUE(it == it2) << "Assigned iterators must point to the "
			<< "element same as its source points to";

			// Verifies that prefix operator++() returns *this.
			EXPECT_EQ(&it, &(++it)) << "Result of the prefix operator++ must be "
			<< "refer to the original object";

			// Verifies that the result of the postfix operator++ points to the value
			// pointed to by the original iterator.
			int original_value = *it; // Have to compute it outside of macro call to be
			// unaffected by the parameter evaluation order.
			EXPECT_EQ(original_value, *(it++));

			// Verifies that prefix and postfix operator++() advance an iterator
			// all the same.
			it2 = it;
			++it;
			++it2;
			EXPECT_TRUE(it == it2);
			}

			// Tests that Range() generates the expected sequence.
			TEST(RangeTest, IntRangeWithDefaultStep) {
			const ParamGenerator<int> gen = Range(0, 3);
			const int expected_values[] = {0, 1, 2};
			VerifyGenerator(gen, expected_values);
			}

			// Edge case. Tests that Range() generates the single element sequence
			// as expected when provided with range limits that are equal.
			TEST(RangeTest, IntRangeSingleValue) {
			const ParamGenerator<int> gen = Range(0, 1);
			const int expected_values[] = {0};
			VerifyGenerator(gen, expected_values);
			}

			// Edge case. Tests that Range() with generates empty sequence when
			// supplied with an empty range.
			TEST(RangeTest, IntRangeEmpty) {
			const ParamGenerator<int> gen = Range(0, 0);
			VerifyGeneratorIsEmpty(gen);
			}

			// Tests that Range() with custom step (greater then one) generates
			// the expected sequence.
			TEST(RangeTest, IntRangeWithCustomStep) {
			const ParamGenerator<int> gen = Range(0, 9, 3);
			const int expected_values[] = {0, 3, 6};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that Range() with custom step (greater then one) generates
			// the expected sequence when the last element does not fall on the
			// upper range limit. Sequences generated by Range() must not have
			// elements beyond the range limits.
			TEST(RangeTest, IntRangeWithCustomStepOverUpperBound) {
			const ParamGenerator<int> gen = Range(0, 4, 3);
			const int expected_values[] = {0, 3};
			VerifyGenerator(gen, expected_values);
			}

			// Verifies that Range works with user-defined types that define
			// copy constructor, operator=(), operator+(), and operator<().
			class DogAdder {
			public:
			explicit DogAdder(const char* a_value) : value_(a_value) {}
			DogAdder(const DogAdder& other) : value_(other.value_.c_str()) {}

			DogAdder operator=(const DogAdder& other) {
			if (this != &other)
			value_ = other.value_;
			return *this;
			}
			DogAdder operator+(const DogAdder& other) const {
			Message msg;
			msg << value_.c_str() << other.value_.c_str();
			return DogAdder(msg.GetString().c_str());
			}
			bool operator<(const DogAdder& other) const {
			return value_ < other.value_;
			}
			const std::string& value() const { return value_; }

			private:
			std::string value_;
			};

			TEST(RangeTest, WorksWithACustomType) {
			const ParamGenerator<DogAdder> gen =
			Range(DogAdder("cat"), DogAdder("catdogdog"), DogAdder("dog"));
			ParamGenerator<DogAdder>::iterator it = gen.begin();

			ASSERT_FALSE(it == gen.end());
			EXPECT_STREQ("cat", it->value().c_str());

			ASSERT_FALSE(++it == gen.end());
			EXPECT_STREQ("catdog", it->value().c_str());

			EXPECT_TRUE(++it == gen.end());
			}

			class IntWrapper {
			public:
			explicit IntWrapper(int a_value) : value_(a_value) {}
			IntWrapper(const IntWrapper& other) : value_(other.value_) {}

			IntWrapper operator=(const IntWrapper& other) {
			value_ = other.value_;
			return *this;
			}
			// operator+() adds a different type.
			IntWrapper operator+(int other) const { return IntWrapper(value_ + other); }
			bool operator<(const IntWrapper& other) const {
			return value_ < other.value_;
			}
			int value() const { return value_; }

			private:
			int value_;
			};

			TEST(RangeTest, WorksWithACustomTypeWithDifferentIncrementType) {
			const ParamGenerator<IntWrapper> gen = Range(IntWrapper(0), IntWrapper(2));
			ParamGenerator<IntWrapper>::iterator it = gen.begin();

			ASSERT_FALSE(it == gen.end());
			EXPECT_EQ(0, it->value());

			ASSERT_FALSE(++it == gen.end());
			EXPECT_EQ(1, it->value());

			EXPECT_TRUE(++it == gen.end());
			}

			// Tests that ValuesIn() with an array parameter generates
			// the expected sequence.
			TEST(ValuesInTest, ValuesInArray) {
			int array[] = {3, 5, 8};
			const ParamGenerator<int> gen = ValuesIn(array);
			VerifyGenerator(gen, array);
			}

			// Tests that ValuesIn() with a const array parameter generates
			// the expected sequence.
			TEST(ValuesInTest, ValuesInConstArray) {
			const int array[] = {3, 5, 8};
			const ParamGenerator<int> gen = ValuesIn(array);
			VerifyGenerator(gen, array);
			}

			// Edge case. Tests that ValuesIn() with an array parameter containing a
			// single element generates the single element sequence.
			TEST(ValuesInTest, ValuesInSingleElementArray) {
			int array[] = {42};
			const ParamGenerator<int> gen = ValuesIn(array);
			VerifyGenerator(gen, array);
			}

			// Tests that ValuesIn() generates the expected sequence for an STL
			// container (vector).
			TEST(ValuesInTest, ValuesInVector) {
			typedef ::std::vector<int> ContainerType;
			ContainerType values;
			values.push_back(3);
			values.push_back(5);
			values.push_back(8);
			const ParamGenerator<int> gen = ValuesIn(values);

			const int expected_values[] = {3, 5, 8};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that ValuesIn() generates the expected sequence.
			TEST(ValuesInTest, ValuesInIteratorRange) {
			typedef ::std::vector<int> ContainerType;
			ContainerType values;
			values.push_back(3);
			values.push_back(5);
			values.push_back(8);
			const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());

			const int expected_values[] = {3, 5, 8};
			VerifyGenerator(gen, expected_values);
			}

			// Edge case. Tests that ValuesIn() provided with an iterator range specifying a
			// single value generates a single-element sequence.
			TEST(ValuesInTest, ValuesInSingleElementIteratorRange) {
			typedef ::std::vector<int> ContainerType;
			ContainerType values;
			values.push_back(42);
			const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());

			const int expected_values[] = {42};
			VerifyGenerator(gen, expected_values);
			}

			// Edge case. Tests that ValuesIn() provided with an empty iterator range
			// generates an empty sequence.
			TEST(ValuesInTest, ValuesInEmptyIteratorRange) {
			typedef ::std::vector<int> ContainerType;
			ContainerType values;
			const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());

			VerifyGeneratorIsEmpty(gen);
			}

			// Tests that the Values() generates the expected sequence.
			TEST(ValuesTest, ValuesWorks) {
			const ParamGenerator<int> gen = Values(3, 5, 8);

			const int expected_values[] = {3, 5, 8};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that Values() generates the expected sequences from elements of
			// different types convertible to ParamGenerator's parameter type.
			TEST(ValuesTest, ValuesWorksForValuesOfCompatibleTypes) {
			const ParamGenerator<double> gen = Values(3, 5.0f, 8.0);

			const double expected_values[] = {3.0, 5.0, 8.0};
			VerifyGenerator(gen, expected_values);
			}

			TEST(ValuesTest, ValuesWorksForMaxLengthList) {
			const ParamGenerator<int> gen = Values(
			10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
			110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
			210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
			310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
			410, 420, 430, 440, 450, 460, 470, 480, 490, 500);

			const int expected_values[] = {
			10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
			110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
			210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
			310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
			410, 420, 430, 440, 450, 460, 470, 480, 490, 500};
			VerifyGenerator(gen, expected_values);
			}

			// Edge case test. Tests that single-parameter Values() generates the sequence
			// with the single value.
			TEST(ValuesTest, ValuesWithSingleParameter) {
			const ParamGenerator<int> gen = Values(42);

			const int expected_values[] = {42};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that Bool() generates sequence (false, true).
			TEST(BoolTest, BoolWorks) {
			const ParamGenerator<bool> gen = Bool();

			const bool expected_values[] = {false, true};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that Combine() with two parameters generates the expected sequence.
			TEST(CombineTest, CombineWithTwoParameters) {
			const char* foo = "foo";
			const char* bar = "bar";
			const ParamGenerator<std::tuple<const char*, int> > gen =
			Combine(Values(foo, bar), Values(3, 4));

			std::tuple<const char*, int> expected_values[] = {
			std::make_tuple(foo, 3), std::make_tuple(foo, 4), std::make_tuple(bar, 3),
			std::make_tuple(bar, 4)};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that Combine() with three parameters generates the expected sequence.
			TEST(CombineTest, CombineWithThreeParameters) {
			const ParamGenerator<std::tuple<int, int, int> > gen =
			Combine(Values(0, 1), Values(3, 4), Values(5, 6));
			std::tuple<int, int, int> expected_values[] = {
			std::make_tuple(0, 3, 5), std::make_tuple(0, 3, 6),
			std::make_tuple(0, 4, 5), std::make_tuple(0, 4, 6),
			std::make_tuple(1, 3, 5), std::make_tuple(1, 3, 6),
			std::make_tuple(1, 4, 5), std::make_tuple(1, 4, 6)};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that the Combine() with the first parameter generating a single value
			// sequence generates a sequence with the number of elements equal to the
			// number of elements in the sequence generated by the second parameter.
			TEST(CombineTest, CombineWithFirstParameterSingleValue) {
			const ParamGenerator<std::tuple<int, int> > gen =
			Combine(Values(42), Values(0, 1));

			std::tuple<int, int> expected_values[] = {std::make_tuple(42, 0),
			std::make_tuple(42, 1)};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that the Combine() with the second parameter generating a single value
			// sequence generates a sequence with the number of elements equal to the
			// number of elements in the sequence generated by the first parameter.
			TEST(CombineTest, CombineWithSecondParameterSingleValue) {
			const ParamGenerator<std::tuple<int, int> > gen =
			Combine(Values(0, 1), Values(42));

			std::tuple<int, int> expected_values[] = {std::make_tuple(0, 42),
			std::make_tuple(1, 42)};
			VerifyGenerator(gen, expected_values);
			}

			// Tests that when the first parameter produces an empty sequence,
			// Combine() produces an empty sequence, too.
			TEST(CombineTest, CombineWithFirstParameterEmptyRange) {
			const ParamGenerator<std::tuple<int, int> > gen =
			Combine(Range(0, 0), Values(0, 1));
			VerifyGeneratorIsEmpty(gen);
			}

			// Tests that when the second parameter produces an empty sequence,
			// Combine() produces an empty sequence, too.
			TEST(CombineTest, CombineWithSecondParameterEmptyRange) {
			const ParamGenerator<std::tuple<int, int> > gen =
			Combine(Values(0, 1), Range(1, 1));
			VerifyGeneratorIsEmpty(gen);
			}

			// Edge case. Tests that combine works with the maximum number
			// of parameters supported by Google Test (currently 10).
			TEST(CombineTest, CombineWithMaxNumberOfParameters) {
			const char* foo = "foo";
			const char* bar = "bar";
			const ParamGenerator<
			std::tuple<const char*, int, int, int, int, int, int, int, int, int> >
			gen =
			Combine(Values(foo, bar), Values(1), Values(2), Values(3), Values(4),
			Values(5), Values(6), Values(7), Values(8), Values(9));

			std::tuple<const char*, int, int, int, int, int, int, int, int, int>
			expected_values[] = {std::make_tuple(foo, 1, 2, 3, 4, 5, 6, 7, 8, 9),
			std::make_tuple(bar, 1, 2, 3, 4, 5, 6, 7, 8, 9)};
			VerifyGenerator(gen, expected_values);
			}

			class NonDefaultConstructAssignString {
			public:
			NonDefaultConstructAssignString(const std::string& s) : str_(s) {}

			const std::string& str() const { return str_; }

			private:
			std::string str_;

			// Not default constructible
			NonDefaultConstructAssignString();
			// Not assignable
			void operator=(const NonDefaultConstructAssignString&);
			};

			TEST(CombineTest, NonDefaultConstructAssign) {
			const ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> > gen =
			Combine(Values(0, 1), Values(NonDefaultConstructAssignString("A"),
			NonDefaultConstructAssignString("B")));

			ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> >::iterator
			it = gen.begin();

			EXPECT_EQ(0, std::get<0>(*it));
			EXPECT_EQ("A", std::get<1>(*it).str());
			++it;

			EXPECT_EQ(0, std::get<0>(*it));
			EXPECT_EQ("B", std::get<1>(*it).str());
			++it;

			EXPECT_EQ(1, std::get<0>(*it));
			EXPECT_EQ("A", std::get<1>(*it).str());
			++it;

			EXPECT_EQ(1, std::get<0>(*it));
			EXPECT_EQ("B", std::get<1>(*it).str());
			++it;

			EXPECT_TRUE(it == gen.end());
			}


			// Tests that an generator produces correct sequence after being
			// assigned from another generator.
			TEST(ParamGeneratorTest, AssignmentWorks) {
			ParamGenerator<int> gen = Values(1, 2);
			const ParamGenerator<int> gen2 = Values(3, 4);
			gen = gen2;

			const int expected_values[] = {3, 4};
			VerifyGenerator(gen, expected_values);
			}

			// This test verifies that the tests are expanded and run as specified:
			// one test per element from the sequence produced by the generator
			// specified in INSTANTIATE_TEST_SUITE_P. It also verifies that the test's
			// fixture constructor, SetUp(), and TearDown() have run and have been
			// supplied with the correct parameters.

			// The use of environment object allows detection of the case where no test
			// case functionality is run at all. In this case TearDownTestSuite will not
			// be able to detect missing tests, naturally.
			template <int kExpectedCalls>
			class TestGenerationEnvironment : public ::testing::Environment {
			public:
			static TestGenerationEnvironment* Instance() {
			static TestGenerationEnvironment* instance = new TestGenerationEnvironment;
			return instance;
			}

			void FixtureConstructorExecuted() { fixture_constructor_count_++; }
			void SetUpExecuted() { set_up_count_++; }
			void TearDownExecuted() { tear_down_count_++; }
			void TestBodyExecuted() { test_body_count_++; }

			void TearDown() override {
			// If all MultipleTestGenerationTest tests have been de-selected
			// by the filter flag, the following checks make no sense.
			bool perform_check = false;

			for (int i = 0; i < kExpectedCalls; ++i) {
			Message msg;
			msg << "TestsExpandedAndRun/" << i;
			if (UnitTestOptions::FilterMatchesTest(
			"TestExpansionModule/MultipleTestGenerationTest",
			msg.GetString().c_str())) {
			perform_check = true;
			}
			}
			if (perform_check) {
			EXPECT_EQ(kExpectedCalls, fixture_constructor_count_)
			<< "Fixture constructor of ParamTestGenerationTest test case "
			<< "has not been run as expected.";
			EXPECT_EQ(kExpectedCalls, set_up_count_)
			<< "Fixture SetUp method of ParamTestGenerationTest test case "
			<< "has not been run as expected.";
			EXPECT_EQ(kExpectedCalls, tear_down_count_)
			<< "Fixture TearDown method of ParamTestGenerationTest test case "
			<< "has not been run as expected.";
			EXPECT_EQ(kExpectedCalls, test_body_count_)
			<< "Test in ParamTestGenerationTest test case "
			<< "has not been run as expected.";
			}
			}

			private:
			TestGenerationEnvironment() : fixture_constructor_count_(0), set_up_count_(0),
			tear_down_count_(0), test_body_count_(0) {}

			int fixture_constructor_count_;
			int set_up_count_;
			int tear_down_count_;
			int test_body_count_;

			GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationEnvironment);
			};

			const int test_generation_params[] = {36, 42, 72};

			class TestGenerationTest : public TestWithParam<int> {
			public:
			enum {
			PARAMETER_COUNT =
			sizeof(test_generation_params)/sizeof(test_generation_params[0])
			};

			typedef TestGenerationEnvironment<PARAMETER_COUNT> Environment;

			TestGenerationTest() {
			Environment::Instance()->FixtureConstructorExecuted();
			current_parameter_ = GetParam();
			}
			void SetUp() override {
			Environment::Instance()->SetUpExecuted();
			EXPECT_EQ(current_parameter_, GetParam());
			}
			void TearDown() override {
			Environment::Instance()->TearDownExecuted();
			EXPECT_EQ(current_parameter_, GetParam());
			}

			static void SetUpTestSuite() {
			bool all_tests_in_test_case_selected = true;

			for (int i = 0; i < PARAMETER_COUNT; ++i) {
			Message test_name;
			test_name << "TestsExpandedAndRun/" << i;
			if ( !UnitTestOptions::FilterMatchesTest(
			"TestExpansionModule/MultipleTestGenerationTest",
			test_name.GetString())) {
			all_tests_in_test_case_selected = false;
			}
			}
			EXPECT_TRUE(all_tests_in_test_case_selected)
			<< "When running the TestGenerationTest test case all of its tests\n"
			<< "must be selected by the filter flag for the test case to pass.\n"
			<< "If not all of them are enabled, we can't reliably conclude\n"
			<< "that the correct number of tests have been generated.";

			collected_parameters_.clear();
			}

			static void TearDownTestSuite() {
			vector<int> expected_values(test_generation_params,
			test_generation_params + PARAMETER_COUNT);
			// Test execution order is not guaranteed by Google Test,
			// so the order of values in collected_parameters_ can be
			// different and we have to sort to compare.
			sort(expected_values.begin(), expected_values.end());
			sort(collected_parameters_.begin(), collected_parameters_.end());

			EXPECT_TRUE(collected_parameters_ == expected_values);
			}

			protected:
			int current_parameter_;
			static vector<int> collected_parameters_;

			private:
			GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationTest);
			};
			vector<int> TestGenerationTest::collected_parameters_;

			TEST_P(TestGenerationTest, TestsExpandedAndRun) {
			Environment::Instance()->TestBodyExecuted();
			EXPECT_EQ(current_parameter_, GetParam());
			collected_parameters_.push_back(GetParam());
			}
			INSTANTIATE_TEST_SUITE_P(TestExpansionModule, TestGenerationTest,
			ValuesIn(test_generation_params));

			// This test verifies that the element sequence (third parameter of
			// INSTANTIATE_TEST_SUITE_P) is evaluated in InitGoogleTest() and neither at
			// the call site of INSTANTIATE_TEST_SUITE_P nor in RUN_ALL_TESTS(). For
			// that, we declare param_value_ to be a static member of
			// GeneratorEvaluationTest and initialize it to 0. We set it to 1 in
			// main(), just before invocation of InitGoogleTest(). After calling
			// InitGoogleTest(), we set the value to 2. If the sequence is evaluated
			// before or after InitGoogleTest, INSTANTIATE_TEST_SUITE_P will create a
			// test with parameter other than 1, and the test body will fail the
			// assertion.
			class GeneratorEvaluationTest : public TestWithParam<int> {
			public:
			static int param_value() { return param_value_; }
			static void set_param_value(int param_value) { param_value_ = param_value; }

			private:
			static int param_value_;
			};
			int GeneratorEvaluationTest::param_value_ = 0;

			TEST_P(GeneratorEvaluationTest, GeneratorsEvaluatedInMain) {
			EXPECT_EQ(1, GetParam());
			}
			INSTANTIATE_TEST_SUITE_P(GenEvalModule, GeneratorEvaluationTest,
			Values(GeneratorEvaluationTest::param_value()));

			// Tests that generators defined in a different translation unit are
			// functional. Generator extern_gen is defined in gtest-param-test_test2.cc.
			extern ParamGenerator<int> extern_gen;
			class ExternalGeneratorTest : public TestWithParam<int> {};
			TEST_P(ExternalGeneratorTest, ExternalGenerator) {
			// Sequence produced by extern_gen contains only a single value
			// which we verify here.
			EXPECT_EQ(GetParam(), 33);
			}
			INSTANTIATE_TEST_SUITE_P(ExternalGeneratorModule, ExternalGeneratorTest,
			extern_gen);

			// Tests that a parameterized test case can be defined in one translation
			// unit and instantiated in another. This test will be instantiated in
			// gtest-param-test_test2.cc. ExternalInstantiationTest fixture class is
			// defined in gtest-param-test_test.h.
			TEST_P(ExternalInstantiationTest, IsMultipleOf33) {
			EXPECT_EQ(0, GetParam() % 33);
			}

			// Tests that a parameterized test case can be instantiated with multiple
			// generators.
			class MultipleInstantiationTest : public TestWithParam<int> {};
			TEST_P(MultipleInstantiationTest, AllowsMultipleInstances) {
			}
			INSTANTIATE_TEST_SUITE_P(Sequence1, MultipleInstantiationTest, Values(1, 2));
			INSTANTIATE_TEST_SUITE_P(Sequence2, MultipleInstantiationTest, Range(3, 5));

			// Tests that a parameterized test case can be instantiated
			// in multiple translation units. This test will be instantiated
			// here and in gtest-param-test_test2.cc.
			// InstantiationInMultipleTranslationUnitsTest fixture class
			// is defined in gtest-param-test_test.h.
			TEST_P(InstantiationInMultipleTranslationUnitsTest, IsMultipleOf42) {
			EXPECT_EQ(0, GetParam() % 42);
			}
			INSTANTIATE_TEST_SUITE_P(Sequence1, InstantiationInMultipleTranslationUnitsTest,
			Values(42, 42 * 2));

			// Tests that each iteration of parameterized test runs in a separate test
			// object.
			class SeparateInstanceTest : public TestWithParam<int> {
			public:
			SeparateInstanceTest() : count_(0) {}

			static void TearDownTestSuite() {
			EXPECT_GE(global_count_, 2)
			<< "If some (but not all) SeparateInstanceTest tests have been "
			<< "filtered out this test will fail. Make sure that all "
			<< "GeneratorEvaluationTest are selected or de-selected together "
			<< "by the test filter.";
			}

			protected:
			int count_;
			static int global_count_;
			};
			int SeparateInstanceTest::global_count_ = 0;

			TEST_P(SeparateInstanceTest, TestsRunInSeparateInstances) {
			EXPECT_EQ(0, count_++);
			global_count_++;
			}
			INSTANTIATE_TEST_SUITE_P(FourElemSequence, SeparateInstanceTest, Range(1, 4));

			// Tests that all instantiations of a test have named appropriately. Test
			// defined with TEST_P(TestSuiteName, TestName) and instantiated with
			// INSTANTIATE_TEST_SUITE_P(SequenceName, TestSuiteName, generator) must be
			// named SequenceName/TestSuiteName.TestName/i, where i is the 0-based index of
			// the sequence element used to instantiate the test.
			class NamingTest : public TestWithParam<int> {};

			TEST_P(NamingTest, TestsReportCorrectNamesAndParameters) {
			const ::testing::TestInfo* const test_info =
			::testing::UnitTest::GetInstance()->current_test_info();

			EXPECT_STREQ("ZeroToFiveSequence/NamingTest", test_info->test_suite_name());

			Message index_stream;
			index_stream << "TestsReportCorrectNamesAndParameters/" << GetParam();
			EXPECT_STREQ(index_stream.GetString().c_str(), test_info->name());

			EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
			}

			INSTANTIATE_TEST_SUITE_P(ZeroToFiveSequence, NamingTest, Range(0, 5));

			// Tests that macros in test names are expanded correctly.
			class MacroNamingTest : public TestWithParam<int> {};

			#define PREFIX_WITH_FOO(test_name) Foo##test_name
			#define PREFIX_WITH_MACRO(test_name) Macro##test_name

			TEST_P(PREFIX_WITH_MACRO(NamingTest), PREFIX_WITH_FOO(SomeTestName)) {
			const ::testing::TestInfo* const test_info =
			::testing::UnitTest::GetInstance()->current_test_info();

			EXPECT_STREQ("FortyTwo/MacroNamingTest", test_info->test_suite_name());
			EXPECT_STREQ("FooSomeTestName/0", test_info->name());
			}

			INSTANTIATE_TEST_SUITE_P(FortyTwo, MacroNamingTest, Values(42));

			// Tests the same thing for non-parametrized tests.
			class MacroNamingTestNonParametrized : public ::testing::Test {};

			TEST_F(PREFIX_WITH_MACRO(NamingTestNonParametrized),
			PREFIX_WITH_FOO(SomeTestName)) {
			const ::testing::TestInfo* const test_info =
			::testing::UnitTest::GetInstance()->current_test_info();

			EXPECT_STREQ("MacroNamingTestNonParametrized", test_info->test_suite_name());
			EXPECT_STREQ("FooSomeTestName", test_info->name());
			}

			TEST(MacroNameing, LookupNames) {
			std::set<std::string> know_suite_names, know_test_names;

			auto ins = testing::UnitTest::GetInstance();
			int ts = 0;
			while (const testing::TestSuite* suite = ins->GetTestSuite(ts++)) {
			know_suite_names.insert(suite->name());

			int ti = 0;
			while (const testing::TestInfo* info = suite->GetTestInfo(ti++)) {
			know_test_names.insert(std::string(suite->name()) + "." + info->name());
			}
			}

			// Check that the expected form of the test suit name actualy exists.
			EXPECT_NE( //
			know_suite_names.find("FortyTwo/MacroNamingTest"),
			know_suite_names.end());
			EXPECT_NE(
			know_suite_names.find("MacroNamingTestNonParametrized"),
			know_suite_names.end());
			// Check that the expected form of the test name actualy exists.
			EXPECT_NE( //
			know_test_names.find("FortyTwo/MacroNamingTest.FooSomeTestName/0"),
			know_test_names.end());
			EXPECT_NE(
			know_test_names.find("MacroNamingTestNonParametrized.FooSomeTestName"),
			know_test_names.end());
			}

			// Tests that user supplied custom parameter names are working correctly.
			// Runs the test with a builtin helper method which uses PrintToString,
			// as well as a custom function and custom functor to ensure all possible
			// uses work correctly.
			class CustomFunctorNamingTest : public TestWithParam<std::string> {};
			TEST_P(CustomFunctorNamingTest, CustomTestNames) {}

			struct CustomParamNameFunctor {
			std::string operator()(const ::testing::TestParamInfo<std::string>& inf) {
			return inf.param;
			}
			};

			INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctor, CustomFunctorNamingTest,
			Values(std::string("FunctorName")),
			CustomParamNameFunctor());

			INSTANTIATE_TEST_SUITE_P(AllAllowedCharacters, CustomFunctorNamingTest,
			Values("abcdefghijklmnopqrstuvwxyz",
			"ABCDEFGHIJKLMNOPQRSTUVWXYZ", "01234567890_"),
			CustomParamNameFunctor());

			inline std::string CustomParamNameFunction(
			const ::testing::TestParamInfo<std::string>& inf) {
			return inf.param;
			}

			class CustomFunctionNamingTest : public TestWithParam<std::string> {};
			TEST_P(CustomFunctionNamingTest, CustomTestNames) {}

			INSTANTIATE_TEST_SUITE_P(CustomParamNameFunction, CustomFunctionNamingTest,
			Values(std::string("FunctionName")),
			CustomParamNameFunction);

			INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctionP, CustomFunctionNamingTest,
			Values(std::string("FunctionNameP")),
			&CustomParamNameFunction);

			// Test custom naming with a lambda

			class CustomLambdaNamingTest : public TestWithParam<std::string> {};
			TEST_P(CustomLambdaNamingTest, CustomTestNames) {}

			INSTANTIATE_TEST_SUITE_P(CustomParamNameLambda, CustomLambdaNamingTest,
			Values(std::string("LambdaName")),
			[](const ::testing::TestParamInfo<std::string>& inf) {
			return inf.param;
			});

			TEST(CustomNamingTest, CheckNameRegistry) {
			::testing::UnitTest* unit_test = ::testing::UnitTest::GetInstance();
			std::set<std::string> test_names;
			for (int suite_num = 0; suite_num < unit_test->total_test_suite_count();
			++suite_num) {
			const ::testing::TestSuite* test_suite = unit_test->GetTestSuite(suite_num);
			for (int test_num = 0; test_num < test_suite->total_test_count();
			++test_num) {
			const ::testing::TestInfo* test_info = test_suite->GetTestInfo(test_num);
			test_names.insert(std::string(test_info->name()));
			}
			}
			EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctorName"));
			EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionName"));
			EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionNameP"));
			EXPECT_EQ(1u, test_names.count("CustomTestNames/LambdaName"));
			}

			// Test a numeric name to ensure PrintToStringParamName works correctly.

			class CustomIntegerNamingTest : public TestWithParam<int> {};

			TEST_P(CustomIntegerNamingTest, TestsReportCorrectNames) {
			const ::testing::TestInfo* const test_info =
			::testing::UnitTest::GetInstance()->current_test_info();
			Message test_name_stream;
			test_name_stream << "TestsReportCorrectNames/" << GetParam();
			EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
			}

			INSTANTIATE_TEST_SUITE_P(PrintToString, CustomIntegerNamingTest, Range(0, 5),
			::testing::PrintToStringParamName());

			// Test a custom struct with PrintToString.

			struct CustomStruct {
			explicit CustomStruct(int value) : x(value) {}
			int x;
			};

			std::ostream& operator<<(std::ostream& stream, const CustomStruct& val) {
			stream << val.x;
			return stream;
			}

			class CustomStructNamingTest : public TestWithParam<CustomStruct> {};

			TEST_P(CustomStructNamingTest, TestsReportCorrectNames) {
			const ::testing::TestInfo* const test_info =
			::testing::UnitTest::GetInstance()->current_test_info();
			Message test_name_stream;
			test_name_stream << "TestsReportCorrectNames/" << GetParam();
			EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
			}

			INSTANTIATE_TEST_SUITE_P(PrintToString, CustomStructNamingTest,
			Values(CustomStruct(0), CustomStruct(1)),
			::testing::PrintToStringParamName());

			// Test that using a stateful parameter naming function works as expected.

			struct StatefulNamingFunctor {
			StatefulNamingFunctor() : sum(0) {}
			std::string operator()(const ::testing::TestParamInfo<int>& info) {
			int value = info.param + sum;
			sum += info.param;
			return ::testing::PrintToString(value);
			}
			int sum;
			};

			class StatefulNamingTest : public ::testing::TestWithParam<int> {
			protected:
			StatefulNamingTest() : sum_(0) {}
			int sum_;
			};

			TEST_P(StatefulNamingTest, TestsReportCorrectNames) {
			const ::testing::TestInfo* const test_info =
			::testing::UnitTest::GetInstance()->current_test_info();
			sum_ += GetParam();
			Message test_name_stream;
			test_name_stream << "TestsReportCorrectNames/" << sum_;
			EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
			}

			INSTANTIATE_TEST_SUITE_P(StatefulNamingFunctor, StatefulNamingTest, Range(0, 5),
			StatefulNamingFunctor());

			// Class that cannot be streamed into an ostream. It needs to be copyable
			// (and, in case of MSVC, also assignable) in order to be a test parameter
			// type. Its default copy constructor and assignment operator do exactly
			// what we need.
			class Unstreamable {
			public:
			explicit Unstreamable(int value) : value_(value) {}
			// -Wunused-private-field: dummy accessor for `value_`.
			const int& dummy_value() const { return value_; }

			private:
			int value_;
			};

			class CommentTest : public TestWithParam<Unstreamable> {};

			TEST_P(CommentTest, TestsCorrectlyReportUnstreamableParams) {
			const ::testing::TestInfo* const test_info =
			::testing::UnitTest::GetInstance()->current_test_info();

			EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
			}

			INSTANTIATE_TEST_SUITE_P(InstantiationWithComments, CommentTest,
			Values(Unstreamable(1)));

			// Verify that we can create a hierarchy of test fixtures, where the base
			// class fixture is not parameterized and the derived class is. In this case
			// ParameterizedDerivedTest inherits from NonParameterizedBaseTest. We
			// perform simple tests on both.
			class NonParameterizedBaseTest : public ::testing::Test {
			public:
			NonParameterizedBaseTest() : n_(17) { }
			protected:
			int n_;
			};

			class ParameterizedDerivedTest : public NonParameterizedBaseTest,
			public ::testing::WithParamInterface<int> {
			protected:
			ParameterizedDerivedTest() : count_(0) { }
			int count_;
			static int global_count_;
			};

			int ParameterizedDerivedTest::global_count_ = 0;

			TEST_F(NonParameterizedBaseTest, FixtureIsInitialized) {
			EXPECT_EQ(17, n_);
			}

			TEST_P(ParameterizedDerivedTest, SeesSequence) {
			EXPECT_EQ(17, n_);
			EXPECT_EQ(0, count_++);
			EXPECT_EQ(GetParam(), global_count_++);
			}

			class ParameterizedDeathTest : public ::testing::TestWithParam<int> { };

			TEST_F(ParameterizedDeathTest, GetParamDiesFromTestF) {
			EXPECT_DEATH_IF_SUPPORTED(GetParam(),
			".* value-parameterized test .*");
			}

			INSTANTIATE_TEST_SUITE_P(RangeZeroToFive, ParameterizedDerivedTest,
			Range(0, 5));

			// Tests param generator working with Enums
			enum MyEnums {
			ENUM1 = 1,
			ENUM2 = 3,
			ENUM3 = 8,
			};

			class MyEnumTest : public testing::TestWithParam<MyEnums> {};

			TEST_P(MyEnumTest, ChecksParamMoreThanZero) { EXPECT_GE(10, GetParam()); }
			INSTANTIATE_TEST_SUITE_P(MyEnumTests, MyEnumTest,
			::testing::Values(ENUM1, ENUM2, 0));

			int main(int argc, char **argv) {
			// Used in TestGenerationTest test suite.
			AddGlobalTestEnvironment(TestGenerationTest::Environment::Instance());
			// Used in GeneratorEvaluationTest test suite. Tests that the updated value
			// will be picked up for instantiating tests in GeneratorEvaluationTest.
			GeneratorEvaluationTest::set_param_value(1);

			::testing::InitGoogleTest(&argc, argv);

			// Used in GeneratorEvaluationTest test suite. Tests that value updated
			// here will NOT be used for instantiating tests in
			// GeneratorEvaluationTest.
			GeneratorEvaluationTest::set_param_value(2);

			return RUN_ALL_TESTS();
			}

R9484/googletest/test/googletest-param-test-test.cca4a5a7c768cemaster

googletest-param-test-test.ccView Options

R9484/googletest/test/googletest-param-test-test.cc
a4a5a7c768cemaster

googletest-param-test-test.cc
View Options