Testing Reference

GoogleTest defines the following macros for writing tests.

Defines an individual test named TestName in the test suite TestSuiteName, consisting of the given statements.

Both arguments TestSuiteName and TestName must be valid C++ identifiers and must not contain underscores (_). Tests in different test suites can have the same individual name.

The statements within the test body can be any code under test. Assertions used within the test body determine the outcome of the test.

TEST_F

TEST_F(TestFixtureName, TestName) {
  ... statements ...
}

Defines an individual test named TestName that uses the test fixture class TestFixtureName. The test suite name is TestFixtureName.

Both arguments TestFixtureName and TestName must be valid C++ identifiers and must not contain underscores (_). TestFixtureName must be the name of a test fixture class—see Test Fixtures.

The statements within the test body can be any code under test. used within the test body determine the outcome of the test.

TEST_P

TEST_P(TestFixtureName, TestName) {
  ... statements ...
}

Defines an individual value-parameterized test named TestName that uses the test fixture class TestFixtureName. The test suite name is TestFixtureName.

Both arguments TestFixtureName and TestName must be valid C++ identifiers and must not contain underscores (_). TestFixtureName must be the name of a value-parameterized test fixture class—see .

The statements within the test body can be any code under test. Within the test body, the test parameter can be accessed with the GetParam() function (see WithParamInterface). For example:

TEST_P(MyTestSuite, DoesSomething) {
  ...
  ...
}

used within the test body determine the outcome of the test.

INSTANTIATE_TEST_SUITE_P

INSTANTIATE_TEST_SUITE_P(InstantiationName,TestSuiteName,param_generator)
INSTANTIATE_TEST_SUITE_P(InstantiationName,TestSuiteName,param_generator,name_generator)

Instantiates the value-parameterized test suite TestSuiteName (defined with TEST_P).

The argument InstantiationName is a unique name for the instantiation of the test suite, to distinguish between multiple instantiations. In test output, the instantiation name is added as a prefix to the test suite name TestSuiteName.

The argument param_generator is one of the following GoogleTest-provided functions that generate the test parameters, all defined in the ::testing namespace:

The optional last argument name_generator is a function or functor that generates custom test name suffixes based on the test parameters. The function must accept an argument of type and return a std::string. The test name suffix can only contain alphanumeric characters and underscores. GoogleTest provides PrintToStringParamName, or a custom function can be used for more control:

INSTANTIATE_TEST_SUITE_P(
    MyInstantiation, MyTestSuite,
    ::testing::Values(...),
    [](const ::testing::TestParamInfo<MyTestSuite::ParamType>& info) {
      // Can use info.param here to generate the test suffix
      std::string name = ...
      return name;
    });

For more information, see .

TYPED_TEST_SUITE

TYPED_TEST_SUITE(TestFixtureName,Types)

Defines a typed test suite based on the test fixture TestFixtureName. The test suite name is TestFixtureName.

The argument TestFixtureName is a fixture class template, parameterized by a type, for example:

template <typename T>
class MyFixture : public ::testing::Test {
 public:
  ...
  using List = std::list<T>;
  static T shared_;
  T value_;
};

The argument Types is a Types object representing the list of types to run the tests on, for example:

using MyTypes = ::testing::Types<char, int, unsigned int>;
TYPED_TEST_SUITE(MyFixture, MyTypes);

The type alias (using or typedef) is necessary for the TYPED_TEST_SUITE macro to parse correctly.

See also and Typed Tests for more information.

TYPED_TEST

Defines an individual typed test named TestName in the typed test suite TestSuiteName. The test suite must be defined with TYPED_TEST_SUITE.

Within the test body, the special name TypeParam refers to the type parameter, and TestFixture refers to the fixture class. See the following example:

TYPED_TEST(MyFixture, Example) {
  // Inside a test, refer to the special name TypeParam to get the type
  // parameter.  Since we are inside a derived class template, C++ requires
  // us to visit the members of MyFixture via 'this'.
  TypeParam n = this->value_;
  // To visit static members of the fixture, add the 'TestFixture::'
  // prefix.
  n += TestFixture::shared_;
  // To refer to typedefs in the fixture, add the 'typename TestFixture::'
  // prefix. The 'typename' is required to satisfy the compiler.
  typename TestFixture::List values;
  values.push_back(n);
  ...
}

For more information, see .

TYPED_TEST_SUITE_P

TYPED_TEST_SUITE_P(TestFixtureName)

Defines a type-parameterized test suite based on the test fixture TestFixtureName. The test suite name is TestFixtureName.

The argument TestFixtureName is a fixture class template, parameterized by a type. See for an example.

See also TYPED_TEST_P and for more information.

TYPED_TEST_P

TYPED_TEST_P(TestSuiteName, TestName) {
  ... statements ...
}

Defines an individual type-parameterized test named TestName in the type-parameterized test suite TestSuiteName. The test suite must be defined with .

Within the test body, the special name TypeParam refers to the type parameter, and TestFixture refers to the fixture class. See TYPED_TEST for an example.

See also and Type-Parameterized Tests for more information.

REGISTER_TYPED_TEST_SUITE_P

REGISTER_TYPED_TEST_SUITE_P(TestSuiteName,TestNames...)

Registers the type-parameterized tests TestNames... of the test suite TestSuiteName. The test suite and tests must be defined with TYPED_TEST_SUITE_P and .

For example:

// Define the test suite and tests.
TYPED_TEST_SUITE_P(MyFixture);
TYPED_TEST_P(MyFixture, HasPropertyA) { ... }
TYPED_TEST_P(MyFixture, HasPropertyB) { ... }
// Register the tests in the test suite.
REGISTER_TYPED_TEST_SUITE_P(MyFixture, HasPropertyA, HasPropertyB);

See also INSTANTIATE_TYPED_TEST_SUITE_P and for more information.

INSTANTIATE_TYPED_TEST_SUITE_P

INSTANTIATE_TYPED_TEST_SUITE_P(InstantiationName,TestSuiteName,)

Instantiates the type-parameterized test suite TestSuiteName. The test suite must be registered with .

The argument Types is a Types object representing the list of types to run the tests on, for example:

using MyTypes = ::testing::Types<char, int, unsigned int>;
INSTANTIATE_TYPED_TEST_SUITE_P(MyInstantiation, MyFixture, MyTypes);

The type alias (using or typedef) is necessary for the INSTANTIATE_TYPED_TEST_SUITE_P macro to parse correctly.

For more information, see .

FRIEND_TEST

FRIEND_TEST(TestSuiteName,TestName)

Within a class body, declares an individual test as a friend of the class, enabling the test to access private class members.

If the class is defined in a namespace, then in order to be friends of the class, test fixtures and tests must be defined in the exact same namespace, without inline or anonymous namespaces.

For example, if the class definition looks like the following:

namespace my_namespace {
class MyClass {
  friend class MyClassTest;
  FRIEND_TEST(MyClassTest, HasPropertyA);
  FRIEND_TEST(MyClassTest, HasPropertyB);
  ... definition of class MyClass ...
};
}  // namespace my_namespace

Then the test code should look like:

namespace my_namespace {
class MyClassTest : public ::testing::Test {
  ...
};
TEST_F(MyClassTest, HasPropertyA) { ... }
TEST_F(MyClassTest, HasPropertyB) { ... }
}  // namespace my_namespace

See for more information.

SCOPED_TRACE

SCOPED_TRACE(message)

Causes the current file name, line number, and the given message message to be added to the failure message for each assertion failure that occurs in the scope.

For more information, see .

GTEST_SKIP

GTEST_SKIP()

Prevents further test execution at runtime.

Can be used in individual test cases or in the SetUp() methods of test environments or test fixtures (classes derived from the Environment or classes). If used in a global test environment SetUp() method, it skips all tests in the test program. If used in a test fixture SetUp() method, it skips all tests in the corresponding test suite.

Similar to assertions, GTEST_SKIP allows streaming a custom message into it.

See Skipping Test Execution for more information.

GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST

GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(TestSuiteName)

Allows the value-parameterized test suite TestSuiteName to be uninstantiated.

By default, every TEST_P call without a corresponding call causes a failing test in the test suite GoogleTestVerification. GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST suppresses this failure for the given test suite.

GoogleTest defines the following classes and types to help with writing tests.

::testing::AssertionResult

A class for indicating whether an assertion was successful.

When the assertion wasn’t successful, the AssertionResult object stores a non-empty failure message that can be retrieved with the object’s message() method.

To create an instance of this class, use one of the factory functions AssertionSuccess() or .

AssertionException

::testing::AssertionException

Exception which can be thrown from .

EmptyTestEventListener

::testing::EmptyTestEventListener

Provides an empty implementation of all methods in the interface, such that a subclass only needs to override the methods it cares about.

Environment

::testing::Environment

Represents a global test environment. See .

Protected Methods

SetUp

virtual void Environment::SetUp()

Override this to define how to set up the environment.

TearDown

virtual void Environment::TearDown()

Override this to define how to tear down the environment.

ScopedTrace

::testing::ScopedTrace

An instance of this class causes a trace to be included in every test failure message generated by code in the scope of the lifetime of the ScopedTrace instance. The effect is undone with the destruction of the instance.

The ScopedTrace constructor has the following form:

Example usage:

::testing::ScopedTrace trace("file.cc", 123, "message");

The resulting trace includes the given source file path and line number, and the given message. The message argument can be anything streamable to std::ostream.

Test

::testing::Test

The abstract class that all tests inherit from. Test is not copyable.

Public Methods

SetUpTestSuite

static void Test::SetUpTestSuite()

Performs shared setup for all tests in the test suite. GoogleTest calls SetUpTestSuite() before running the first test in the test suite.

TearDownTestSuite

static void Test::TearDownTestSuite()

Performs shared teardown for all tests in the test suite. GoogleTest calls TearDownTestSuite() after running the last test in the test suite.

HasFatalFailure

static bool Test::HasFatalFailure()

Returns true if and only if the current test has a fatal failure.

HasNonfatalFailure

static bool Test::HasNonfatalFailure()

Returns true if and only if the current test has a nonfatal failure.

HasFailure

static bool Test::HasFailure()

Returns true if and only if the current test has any failure, either fatal or nonfatal.

IsSkipped

static bool Test::IsSkipped()

Returns true if and only if the current test was skipped.

RecordProperty

static void Test::RecordProperty(const std::string& key, const std::string& value)
static void Test::RecordProperty(const std::string& key, int value)

Logs a property for the current test, test suite, or entire invocation of the test program. Only the last value for a given key is logged.

The key must be a valid XML attribute name, and cannot conflict with the ones already used by GoogleTest (name, file, line, status, time, classname, type_param, and value_param).

RecordProperty is public static so it can be called from utility functions that are not members of the test fixture.

Calls to RecordProperty made during the lifespan of the test (from the moment its constructor starts to the moment its destructor finishes) are output in XML as attributes of the <testcase> element. Properties recorded from a fixture’s SetUpTestSuite or TearDownTestSuite methods are logged as attributes of the corresponding <testsuite> element. Calls to RecordProperty made in the global context (before or after invocation of RUN_ALL_TESTS or from the SetUp/TearDown methods of registered Environment objects) are output as attributes of the <testsuites> element.

Protected Methods

SetUp

virtual void Test::SetUp()

Override this to perform test fixture setup. GoogleTest calls SetUp() before running each individual test.

TearDown

virtual void Test::TearDown()

Override this to perform test fixture teardown. GoogleTest calls TearDown() after running each individual test.

TestWithParam

::testing::TestWithParam<T>

A convenience class which inherits from both Test and .

TestSuite

Represents a test suite. TestSuite is not copyable.

Public Methods

name

const char* TestSuite::name() const

Gets the name of the test suite.

type_param

const char* TestSuite::type_param() const

Returns the name of the parameter type, or NULL if this is not a typed or type-parameterized test suite. See Typed Tests and .

should_run

bool TestSuite::should_run() const

Returns true if any test in this test suite should run.

successful_test_count

int TestSuite::successful_test_count() const

Gets the number of successful tests in this test suite.

skipped_test_count

int TestSuite::skipped_test_count() const

failed_test_count

int TestSuite::failed_test_count() const

Gets the number of failed tests in this test suite.

reportable_disabled_test_count

int TestSuite::reportable_disabled_test_count() const

Gets the number of disabled tests that will be reported in the XML report.

disabled_test_count

int TestSuite::disabled_test_count() const

Gets the number of disabled tests in this test suite.

reportable_test_count

int TestSuite::reportable_test_count() const

Gets the number of tests to be printed in the XML report.

test_to_run_count

int TestSuite::test_to_run_count() const

Get the number of tests in this test suite that should run.

total_test_count

int TestSuite::total_test_count() const

Gets the number of all tests in this test suite.

Passed

bool TestSuite::Passed() const

Returns true if and only if the test suite passed.

Failed

bool TestSuite::Failed() const

Returns true if and only if the test suite failed.

elapsed_time

TimeInMillis TestSuite::elapsed_time() const

Returns the elapsed time, in milliseconds.

start_timestamp

TimeInMillis TestSuite::start_timestamp() const

Gets the time of the test suite start, in ms from the start of the UNIX epoch.

GetTestInfo

const TestInfo* TestSuite::GetTestInfo(int i) const

Returns the TestInfo for 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.

ad_hoc_test_result

const TestResult& TestSuite::ad_hoc_test_result() const

Returns the TestResult that holds test properties recorded during execution of SetUpTestSuite and TearDownTestSuite.

TestInfo

::testing::TestInfo

Stores information about a test.

Public Methods

test_suite_name

const char* TestInfo::test_suite_name() const

Returns the test suite name.

name

const char* TestInfo::name() const

Returns the test name.

type_param

const char* TestInfo::type_param() const

Returns the name of the parameter type, or NULL if this is not a typed or type-parameterized test. See Typed Tests and .

value_param

const char* TestInfo::value_param() const

Returns the text representation of the value parameter, or NULL if this is not a value-parameterized test. See .

file

const char* TestInfo::file() const

Returns the file name where this test is defined.

line

int TestInfo::line() const

Returns the line where this test is defined.

is_in_another_shard

bool TestInfo::is_in_another_shard() const

Returns true if this test should not be run because it’s in another shard.

should_run

bool TestInfo::should_run() const

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.

GoogleTest allows the user to filter the tests by their full names. Only the tests that match the filter will run. See Running a Subset of the Tests for more information.

is_reportable

bool TestInfo::is_reportable() const

Returns true if and only if this test will appear in the XML report.

result

const TestResult* TestInfo::result() const

Returns the result of the test. See .

TestParamInfo

::testing::TestParamInfo<T>

Describes a parameter to a value-parameterized test. The type T is the type of the parameter.

Contains the fields param and index which hold the value of the parameter and its integer index respectively.

UnitTest

::testing::UnitTest

This class contains information about the test program.

UnitTest is a singleton class. The only instance is created when UnitTest::GetInstance() is first called. This instance is never deleted.

UnitTest is not copyable.

Public Methods

GetInstance

static UnitTest* UnitTest::GetInstance()

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.

original_working_dir

Returns the working directory when the first or TEST_F() was executed. The UnitTest object owns the string.

current_test_suite

const TestSuite* UnitTest::current_test_suite() const

Returns the TestSuite object for the test that’s currently running, or NULL if no test is running.

current_test_info

const TestInfo* UnitTest::current_test_info() const

Returns the TestInfo object for the test that’s currently running, or NULL if no test is running.

random_seed

int UnitTest::random_seed() const

Returns the random seed used at the start of the current test run.

successful_test_suite_count

int UnitTest::successful_test_suite_count() const

Gets the number of successful test suites.

failed_test_suite_count

int UnitTest::failed_test_suite_count() const

Gets the number of failed test suites.

total_test_suite_count

int UnitTest::total_test_suite_count() const

Gets the number of all test suites.

test_suite_to_run_count

int UnitTest::test_suite_to_run_count() const

Gets the number of all test suites that contain at least one test that should run.

successful_test_count

int UnitTest::successful_test_count() const

Gets the number of successful tests.

skipped_test_count

int UnitTest::skipped_test_count() const

Gets the number of skipped tests.

failed_test_count

int UnitTest::failed_test_count() const

Gets the number of failed tests.

reportable_disabled_test_count

int UnitTest::reportable_disabled_test_count() const

Gets the number of disabled tests that will be reported in the XML report.

disabled_test_count

int UnitTest::disabled_test_count() const

Gets the number of disabled tests.

reportable_test_count

int UnitTest::reportable_test_count() const

Gets the number of tests to be printed in the XML report.

total_test_count

int UnitTest::total_test_count() const

Gets the number of all tests.

test_to_run_count

int UnitTest::test_to_run_count() const

Gets the number of tests that should run.

start_timestamp

TimeInMillis UnitTest::start_timestamp() const

Gets the time of the test program start, in ms from the start of the UNIX epoch.

elapsed_time

TimeInMillis UnitTest::elapsed_time() const

Gets the elapsed time, in milliseconds.

Passed

bool UnitTest::Passed() const

Returns true if and only if the unit test passed (i.e. all test suites passed).

Failed

bool UnitTest::Failed() const

Returns true if and only if the unit test failed (i.e. some test suite failed or something outside of all tests failed).

GetTestSuite

const TestSuite* UnitTest::GetTestSuite(int i) const

Gets the object for the i-th test suite among all the test suites. i can range from 0 to total_test_suite_count() - 1. If i is not in that range, returns NULL.

ad_hoc_test_result

const TestResult& UnitTest::ad_hoc_test_result() const

Returns the containing information on test failures and properties logged outside of individual test suites.

listeners

TestEventListeners& UnitTest::listeners()

Returns the list of event listeners that can be used to track events inside GoogleTest. See .

TestEventListener

::testing::TestEventListener

The interface for tracing execution of tests. The methods below are listed in the order the corresponding events are fired.

Public Methods

OnTestProgramStart

virtual void TestEventListener::OnTestProgramStart(const UnitTest& unit_test)

Fired before any test activity starts.

OnTestIterationStart

virtual void TestEventListener::OnTestIterationStart(const UnitTest& unit_test, int iteration)

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.

OnEnvironmentsSetUpStart

virtual void TestEventListener::OnEnvironmentsSetUpStart(const UnitTest& unit_test)

Fired before environment set-up for each iteration of tests starts.

OnEnvironmentsSetUpEnd

virtual void TestEventListener::OnEnvironmentsSetUpEnd(const UnitTest& unit_test)

Fired after environment set-up for each iteration of tests ends.

OnTestSuiteStart

virtual void TestEventListener::OnTestSuiteStart(const TestSuite& test_suite)

Fired before the test suite starts.

OnTestStart

virtual void TestEventListener::OnTestStart(const TestInfo& test_info)

Fired before the test starts.

OnTestPartResult

virtual void TestEventListener::OnTestPartResult(const TestPartResult& test_part_result)

Fired after a failed assertion or a SUCCEED() invocation. If you want to throw an exception from this function to skip to the next test, it must be an or inherited from it.

OnTestEnd

virtual void TestEventListener::OnTestEnd(const TestInfo& test_info)

OnTestSuiteEnd

virtual void TestEventListener::OnTestSuiteEnd(const TestSuite& test_suite)

Fired after the test suite ends.

OnEnvironmentsTearDownStart

virtual void TestEventListener::OnEnvironmentsTearDownStart(const UnitTest& unit_test)

Fired before environment tear-down for each iteration of tests starts.

OnEnvironmentsTearDownEnd

virtual void TestEventListener::OnEnvironmentsTearDownEnd(const UnitTest& unit_test)

Fired after environment tear-down for each iteration of tests ends.

OnTestIterationEnd

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

Fired after each iteration of tests finishes.

OnTestProgramEnd

virtual void TestEventListener::OnTestProgramEnd(const UnitTest& unit_test)

Fired after all test activities have ended.

TestEventListeners

::testing::TestEventListeners

Lets users add listeners to track events in GoogleTest.

Public Methods

Append

void TestEventListeners::Append(TestEventListener* listener)

Appends an event listener to the end of the list. GoogleTest assumes ownership of the listener (i.e. it will delete the listener when the test program finishes).

Release

TestEventListener* TestEventListeners::Release(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.

default_result_printer

TestEventListener* TestEventListeners::default_result_printer() const

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 transfers its ownership to the caller and makes this function return NULL the next time.

default_xml_generator

TestEventListener* TestEventListeners::default_xml_generator() const

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 transfers its ownership to the caller and makes this function return NULL the next time.

TestPartResult

::testing::TestPartResult

A copyable object representing the result of a test part (i.e. an assertion or an explicit FAIL(), ADD_FAILURE(), or SUCCESS()).

Public Methods

type

Type TestPartResult::type() const

Gets the outcome of the test part.

The return type Type is an enum defined as follows:

enum Type {
  kSuccess,          // Succeeded.
  kNonFatalFailure,  // Failed but the test can continue.
  kFatalFailure,     // Failed and the test should be terminated.
  kSkip              // Skipped.
};

file_name

const char* TestPartResult::file_name() const

Gets the name of the source file where the test part took place, or NULL if it’s unknown.

line_number

int TestPartResult::line_number() const

Gets the line in the source file where the test part took place, or -1 if it’s unknown.

summary

const char* TestPartResult::summary() const

Gets the summary of the failure message.

message

const char* TestPartResult::message() const

Gets the message associated with the test part.

skipped

bool TestPartResult::skipped() const

Returns true if and only if the test part was skipped.

passed

bool TestPartResult::passed() const

Returns true if and only if the test part passed.

nonfatally_failed

bool TestPartResult::nonfatally_failed() const

Returns true if and only if the test part non-fatally failed.

fatally_failed

bool TestPartResult::fatally_failed() const

Returns true if and only if the test part fatally failed.

failed

bool TestPartResult::failed() const

Returns true if and only if the test part failed.

::testing::TestProperty

A copyable object representing a user-specified test property which can be output as a key/value string pair.

Public Methods

key

const char* key() const

Gets the user-supplied key.

value

const char* value() const

Gets the user-supplied value.

SetValue

void SetValue(const std::string& new_value)

Sets a new value, overriding the previous one.

TestResult

::testing::TestResult

Contains information about the result of a single test.

TestResult is not copyable.

Public Methods

total_part_count

int TestResult::total_part_count() const

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.

test_property_count

int TestResult::test_property_count() const

Returns the number of test properties.

Passed

bool TestResult::Passed() const

Returns true if and only if the test passed (i.e. no test part failed).

Skipped

bool TestResult::Skipped() const

Returns true if and only if the test was skipped.

Failed

bool TestResult::Failed() const

Returns true if and only if the test failed.

HasFatalFailure

bool TestResult::HasFatalFailure() const

Returns true if and only if the test fatally failed.

HasNonfatalFailure

bool TestResult::HasNonfatalFailure() const

Returns true if and only if the test has a non-fatal failure.

elapsed_time

TimeInMillis TestResult::elapsed_time() const

Returns the elapsed time, in milliseconds.

start_timestamp

TimeInMillis TestResult::start_timestamp() const

Gets the time of the test case start, in ms from the start of the UNIX epoch.

GetTestPartResult

const TestPartResult& TestResult::GetTestPartResult(int i) const

Returns the TestPartResult for the i-th test part result among all the results. i can range from 0 to total_part_count() - 1. If i is not in that range, aborts the program.

GetTestProperty

const TestProperty& TestResult::GetTestProperty(int i) const

Returns the TestProperty object for 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.

TimeInMillis

::testing::TimeInMillis

An integer type representing time in milliseconds.

Types

::testing::Types<T...>

Represents a list of types for use in typed tests and type-parameterized tests.

The template argument T... can be any number of types, for example:

::testing::Types<char, int, unsigned int>

See and Type-Parameterized Tests for more information.

WithParamInterface

::testing::WithParamInterface<T>

The pure interface class that all value-parameterized tests inherit from.

A value-parameterized test fixture class must inherit from both Test and WithParamInterface. In most cases that just means inheriting from , but more complicated test hierarchies may need to inherit from Test and WithParamInterface at different levels.

This interface defines the type alias ParamType for the parameter type T and has support for accessing the test parameter value via the GetParam() method:

static const ParamType& GetParam()

For more information, see Value-Parameterized Tests.

GoogleTest defines the following functions to help with writing and running tests.

InitGoogleTest

void ::testing::InitGoogleTest(int* argc, char** argv)
void ::testing::InitGoogleTest(int* argc, wchar_t** argv)
void ::testing::InitGoogleTest()

Initializes GoogleTest. This must be called before calling RUN_ALL_TESTS(). In particular, it parses the command line for the flags that GoogleTest recognizes. Whenever a GoogleTest flag is seen, it is removed from argv, and *argc is decremented.

No value is returned. Instead, the GoogleTest flag variables are updated.

The InitGoogleTest(int* argc, wchar_t** argv) overload can be used in Windows programs compiled in UNICODE mode.

The argument-less InitGoogleTest() overload can be used on Arduino/embedded platforms where there is no argc/argv.

AddGlobalTestEnvironment

Environment* ::testing::AddGlobalTestEnvironment(Environment* env)

Adds a test environment to the test program. Must be called before RUN_ALL_TESTS() is called. See for more information.

RegisterTest

template <typename Factory>
TestInfo* ::testing::RegisterTest(const char* test_suite_name, const char* test_name,
                                  const char* type_param, const char* value_param,
                                  const char* file, int line, Factory factory)

Dynamically registers a test with the framework.

The factory argument is a factory callable (move-constructible) object or function pointer that creates a new instance of the Test object. It handles ownership to the caller. The signature of the callable is Fixture*(), where Fixture is the test fixture class for the test. All tests registered with the same test_suite_name must return the same fixture type. This is checked at runtime.

The framework will infer the fixture class from the factory and will call the SetUpTestSuite and TearDownTestSuite methods for it.

Must be called before RUN_ALL_TESTS() is invoked, otherwise behavior is undefined.

See for more information.

RUN_ALL_TESTS

int RUN_ALL_TESTS()

Use this function 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 .

This function was formerly a macro; thus, it is in the global namespace and has an all-caps name.

AssertionSuccess

AssertionResult ::testing::AssertionSuccess()

Creates a successful assertion result. See .

AssertionFailure

AssertionResult ::testing::AssertionFailure()

Creates a failed assertion result. Use the << operator to store a failure message:

::testing::AssertionFailure() << "My failure message";

See .

StaticAssertTypeEq

::testing::StaticAssertTypeEq<T1, T2>()

Compile-time assertion for type equality. Compiles if and only if T1 and T2 are the same type. The value it returns is irrelevant.

See for more information.

PrintToString

std::string ::testing::PrintToString(x)

Prints any value x using GoogleTest’s value printer.

See for more information.

PrintToStringParamName

std::string ::testing::PrintToStringParamName(TestParamInfo<T>& info)

A built-in parameterized test name generator which returns the result of called on . Does not work when the test parameter is a std::string or C string. See Specifying Names for Value-Parameterized Test Parameters for more information.