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Diffstat (limited to 'testing/gtest/test/gtest-param-test_test.cc')
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diff --git a/testing/gtest/test/gtest-param-test_test.cc b/testing/gtest/test/gtest-param-test_test.cc new file mode 100644 index 0000000..d0a0e73 --- /dev/null +++ b/testing/gtest/test/gtest-param-test_test.cc @@ -0,0 +1,835 @@ +// 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. +// +// Author: vladl@google.com (Vlad Losev) +// +// 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> + +#if GTEST_HAS_PARAM_TEST + +#include <algorithm> +#include <iostream> +#include <list> +#include <sstream> +#include <string> +#include <vector> + +// To include gtest-internal-inl.h. +#define GTEST_IMPLEMENTATION_ 1 +#include "src/gtest-internal-inl.h" // for UnitTestOptions +#undef GTEST_IMPLEMENTATION_ + +#include "test/gtest-param-test_test.h" + +using ::std::vector; +using ::std::sort; + +using ::testing::AddGlobalTestEnvironment; +using ::testing::Bool; +using ::testing::Message; +using ::testing::Range; +using ::testing::TestWithParam; +using ::testing::Values; +using ::testing::ValuesIn; + +#if GTEST_HAS_COMBINE +using ::testing::Combine; +using ::std::tr1::get; +using ::std::tr1::make_tuple; +using ::std::tr1::tuple; +#endif // GTEST_HAS_COMBINE + +using ::testing::internal::ParamGenerator; +using ::testing::internal::UnitTestOptions; + +// Prints a value to a string. +// +// TODO(wan@google.com): 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) { + ::std::stringstream stream; + stream << value; + return stream.str(); +} + +#if GTEST_HAS_COMBINE + +// These overloads allow printing tuples in our tests. We cannot +// define an operator<< for tuples, as that definition needs to be in +// the std namespace in order to be picked up by Google Test via +// Argument-Dependent Lookup, yet defining anything in the std +// namespace in non-STL code is undefined behavior. + +template <typename T1, typename T2> +::std::string PrintValue(const tuple<T1, T2>& value) { + ::std::stringstream stream; + stream << "(" << get<0>(value) << ", " << get<1>(value) << ")"; + return stream.str(); +} + +template <typename T1, typename T2, typename T3> +::std::string PrintValue(const tuple<T1, T2, T3>& value) { + ::std::stringstream stream; + stream << "(" << get<0>(value) << ", " << get<1>(value) + << ", "<< get<2>(value) << ")"; + return stream.str(); +} + +template <typename T1, typename T2, typename T3, typename T4, typename T5, + typename T6, typename T7, typename T8, typename T9, typename T10> +::std::string PrintValue( + const tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>& value) { + ::std::stringstream stream; + stream << "(" << get<0>(value) << ", " << get<1>(value) + << ", "<< get<2>(value) << ", " << get<3>(value) + << ", "<< get<4>(value) << ", " << get<5>(value) + << ", "<< get<6>(value) << ", " << get<7>(value) + << ", "<< get<8>(value) << ", " << get<9>(value) << ")"; + return stream.str(); +} + +#endif // GTEST_HAS_COMBINE + +// 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 ::testing::internal::String& value() const { return value_; } + + private: + ::testing::internal::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); +} + +#if GTEST_HAS_COMBINE + +// Tests that Combine() with two parameters generates the expected sequence. +TEST(CombineTest, CombineWithTwoParameters) { + const char* foo = "foo"; + const char* bar = "bar"; + const ParamGenerator<tuple<const char*, int> > gen = + Combine(Values(foo, bar), Values(3, 4)); + + tuple<const char*, int> expected_values[] = { + make_tuple(foo, 3), make_tuple(foo, 4), + make_tuple(bar, 3), make_tuple(bar, 4)}; + VerifyGenerator(gen, expected_values); +} + +// Tests that Combine() with three parameters generates the expected sequence. +TEST(CombineTest, CombineWithThreeParameters) { + const ParamGenerator<tuple<int, int, int> > gen = Combine(Values(0, 1), + Values(3, 4), + Values(5, 6)); + tuple<int, int, int> expected_values[] = { + make_tuple(0, 3, 5), make_tuple(0, 3, 6), + make_tuple(0, 4, 5), make_tuple(0, 4, 6), + make_tuple(1, 3, 5), make_tuple(1, 3, 6), + make_tuple(1, 4, 5), 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<tuple<int, int> > gen = Combine(Values(42), + Values(0, 1)); + + tuple<int, int> expected_values[] = {make_tuple(42, 0), 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<tuple<int, int> > gen = Combine(Values(0, 1), + Values(42)); + + tuple<int, int> expected_values[] = {make_tuple(0, 42), 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<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<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<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)); + + tuple<const char*, int, int, int, int, int, int, int, int, int> + expected_values[] = {make_tuple(foo, 1, 2, 3, 4, 5, 6, 7, 8, 9), + make_tuple(bar, 1, 2, 3, 4, 5, 6, 7, 8, 9)}; + VerifyGenerator(gen, expected_values); +} + +#endif // GTEST_HAS_COMBINE + +// 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_CASE_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 TestCaseTearDown 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_++; } + + virtual void TearDown() { + // 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(); + } + virtual void SetUp() { + Environment::Instance()->SetUpExecuted(); + EXPECT_EQ(current_parameter_, GetParam()); + } + virtual void TearDown() { + Environment::Instance()->TearDownExecuted(); + EXPECT_EQ(current_parameter_, GetParam()); + } + + static void SetUpTestCase() { + 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 TearDownTestCase() { + 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_CASE_P(TestExpansionModule, TestGenerationTest, + ValuesIn(test_generation_params)); + +// This test verifies that the element sequence (third parameter of +// INSTANTIATE_TEST_CASE_P) is evaluated in InitGoogleTest() and neither at +// the call site of INSTANTIATE_TEST_CASE_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_CASE_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_CASE_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_CASE_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_CASE_P(Sequence1, MultipleInstantiationTest, Values(1, 2)); +INSTANTIATE_TEST_CASE_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(InstantiationInMultipleTranslaionUnitsTest, IsMultipleOf42) { + EXPECT_EQ(0, GetParam() % 42); +} +INSTANTIATE_TEST_CASE_P(Sequence1, + InstantiationInMultipleTranslaionUnitsTest, + 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 TearDownTestCase() { + 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_CASE_P(FourElemSequence, SeparateInstanceTest, Range(1, 4)); + +// Tests that all instantiations of a test have named appropriately. Test +// defined with TEST_P(TestCaseName, TestName) and instantiated with +// INSTANTIATE_TEST_CASE_P(SequenceName, TestCaseName, generator) must be named +// SequenceName/TestCaseName.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, TestsAreNamedAppropriately) { + const ::testing::TestInfo* const test_info = + ::testing::UnitTest::GetInstance()->current_test_info(); + + EXPECT_STREQ("ZeroToFiveSequence/NamingTest", test_info->test_case_name()); + + Message msg; + msg << "TestsAreNamedAppropriately/" << GetParam(); + EXPECT_STREQ(msg.GetString().c_str(), test_info->name()); +} + +INSTANTIATE_TEST_CASE_P(ZeroToFiveSequence, NamingTest, Range(0, 5)); + +#endif // GTEST_HAS_PARAM_TEST + +TEST(CompileTest, CombineIsDefinedOnlyWhenGtestHasParamTestIsDefined) { +#if GTEST_HAS_COMBINE && !GTEST_HAS_PARAM_TEST + FAIL() << "GTEST_HAS_COMBINE is defined while GTEST_HAS_PARAM_TEST is not\n" +#endif +} + +int main(int argc, char **argv) { +#if GTEST_HAS_PARAM_TEST + // Used in TestGenerationTest test case. + AddGlobalTestEnvironment(TestGenerationTest::Environment::Instance()); + // Used in GeneratorEvaluationTest test case. Tests that the updated value + // will be picked up for instantiating tests in GeneratorEvaluationTest. + GeneratorEvaluationTest::set_param_value(1); +#endif // GTEST_HAS_PARAM_TEST + + ::testing::InitGoogleTest(&argc, argv); + +#if GTEST_HAS_PARAM_TEST + // Used in GeneratorEvaluationTest test case. Tests that value updated + // here will NOT be used for instantiating tests in + // GeneratorEvaluationTest. + GeneratorEvaluationTest::set_param_value(2); +#endif // GTEST_HAS_PARAM_TEST + + return RUN_ALL_TESTS(); +} |