3 <!--* toc_depth: 3 *-->
5 This page lists the facilities provided by GoogleTest for writing test programs.
6 To use them, include the header `gtest/gtest.h`.
10 GoogleTest defines the following macros for writing tests.
15 TEST(<em>TestSuiteName</em>, <em>TestName</em>) {
16 ... <em>statements</em> ...
20 Defines an individual test named *`TestName`* in the test suite
21 *`TestSuiteName`*, consisting of the given statements.
23 Both arguments *`TestSuiteName`* and *`TestName`* must be valid C++ identifiers
24 and must not contain underscores (`_`). Tests in different test suites can have
25 the same individual name.
27 The statements within the test body can be any code under test.
28 [Assertions](assertions.md) used within the test body determine the outcome of
34 TEST_F(<em>TestFixtureName</em>, <em>TestName</em>) {
35 ... <em>statements</em> ...
39 Defines an individual test named *`TestName`* that uses the test fixture class
40 *`TestFixtureName`*. The test suite name is *`TestFixtureName`*.
42 Both arguments *`TestFixtureName`* and *`TestName`* must be valid C++
43 identifiers and must not contain underscores (`_`). *`TestFixtureName`* must be
44 the name of a test fixture class—see
45 [Test Fixtures](../primer.md#same-data-multiple-tests).
47 The statements within the test body can be any code under test.
48 [Assertions](assertions.md) used within the test body determine the outcome of
54 TEST_P(<em>TestFixtureName</em>, <em>TestName</em>) {
55 ... <em>statements</em> ...
59 Defines an individual value-parameterized test named *`TestName`* that uses the
60 test fixture class *`TestFixtureName`*. The test suite name is
63 Both arguments *`TestFixtureName`* and *`TestName`* must be valid C++
64 identifiers and must not contain underscores (`_`). *`TestFixtureName`* must be
65 the name of a value-parameterized test fixture class—see
66 [Value-Parameterized Tests](../advanced.md#value-parameterized-tests).
68 The statements within the test body can be any code under test. Within the test
69 body, the test parameter can be accessed with the `GetParam()` function (see
70 [`WithParamInterface`](#WithParamInterface)). For example:
73 TEST_P(MyTestSuite, DoesSomething) {
75 EXPECT_TRUE(DoSomething(GetParam()));
80 [Assertions](assertions.md) used within the test body determine the outcome of
83 See also [`INSTANTIATE_TEST_SUITE_P`](#INSTANTIATE_TEST_SUITE_P).
85 ### INSTANTIATE_TEST_SUITE_P {#INSTANTIATE_TEST_SUITE_P}
87 `INSTANTIATE_TEST_SUITE_P(`*`InstantiationName`*`,`*`TestSuiteName`*`,`*`param_generator`*`)`
89 `INSTANTIATE_TEST_SUITE_P(`*`InstantiationName`*`,`*`TestSuiteName`*`,`*`param_generator`*`,`*`name_generator`*`)`
91 Instantiates the value-parameterized test suite *`TestSuiteName`* (defined with
94 The argument *`InstantiationName`* is a unique name for the instantiation of the
95 test suite, to distinguish between multiple instantiations. In test output, the
96 instantiation name is added as a prefix to the test suite name
99 The argument *`param_generator`* is one of the following GoogleTest-provided
100 functions that generate the test parameters, all defined in the `::testing`
103 <span id="param-generators"></span>
105 | Parameter Generator | Behavior |
106 | ------------------- | ---------------------------------------------------- |
107 | `Range(begin, end [, step])` | Yields values `{begin, begin+step, begin+step+step, ...}`. The values do not include `end`. `step` defaults to 1. |
108 | `Values(v1, v2, ..., vN)` | Yields values `{v1, v2, ..., vN}`. |
109 | `ValuesIn(container)` or `ValuesIn(begin,end)` | Yields values from a C-style array, an STL-style container, or an iterator range `[begin, end)`. |
110 | `Bool()` | Yields sequence `{false, true}`. |
111 | `Combine(g1, g2, ..., gN)` | Yields as `std::tuple` *n*-tuples all combinations (Cartesian product) of the values generated by the given *n* generators `g1`, `g2`, ..., `gN`. |
113 The optional last argument *`name_generator`* is a function or functor that
114 generates custom test name suffixes based on the test parameters. The function
115 must accept an argument of type
116 [`TestParamInfo<class ParamType>`](#TestParamInfo) and return a `std::string`.
117 The test name suffix can only contain alphanumeric characters and underscores.
118 GoogleTest provides [`PrintToStringParamName`](#PrintToStringParamName), or a
119 custom function can be used for more control:
122 INSTANTIATE_TEST_SUITE_P(
123 MyInstantiation, MyTestSuite,
124 ::testing::Values(...),
125 [](const ::testing::TestParamInfo<MyTestSuite::ParamType>& info) {
126 // Can use info.param here to generate the test suffix
127 std::string name = ...
132 For more information, see
133 [Value-Parameterized Tests](../advanced.md#value-parameterized-tests).
136 [`GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST`](#GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST).
138 ### TYPED_TEST_SUITE {#TYPED_TEST_SUITE}
140 `TYPED_TEST_SUITE(`*`TestFixtureName`*`,`*`Types`*`)`
142 Defines a typed test suite based on the test fixture *`TestFixtureName`*. The
143 test suite name is *`TestFixtureName`*.
145 The argument *`TestFixtureName`* is a fixture class template, parameterized by a
149 template <typename T>
150 class MyFixture : public ::testing::Test {
153 using List = std::list<T>;
159 The argument *`Types`* is a [`Types`](#Types) object representing the list of
160 types to run the tests on, for example:
163 using MyTypes = ::testing::Types<char, int, unsigned int>;
164 TYPED_TEST_SUITE(MyFixture, MyTypes);
167 The type alias (`using` or `typedef`) is necessary for the `TYPED_TEST_SUITE`
168 macro to parse correctly.
170 See also [`TYPED_TEST`](#TYPED_TEST) and
171 [Typed Tests](../advanced.md#typed-tests) for more information.
173 ### TYPED_TEST {#TYPED_TEST}
176 TYPED_TEST(<em>TestSuiteName</em>, <em>TestName</em>) {
177 ... <em>statements</em> ...
181 Defines an individual typed test named *`TestName`* in the typed test suite
182 *`TestSuiteName`*. The test suite must be defined with
183 [`TYPED_TEST_SUITE`](#TYPED_TEST_SUITE).
185 Within the test body, the special name `TypeParam` refers to the type parameter,
186 and `TestFixture` refers to the fixture class. See the following example:
189 TYPED_TEST(MyFixture, Example) {
190 // Inside a test, refer to the special name TypeParam to get the type
191 // parameter. Since we are inside a derived class template, C++ requires
192 // us to visit the members of MyFixture via 'this'.
193 TypeParam n = this->value_;
195 // To visit static members of the fixture, add the 'TestFixture::'
197 n += TestFixture::shared_;
199 // To refer to typedefs in the fixture, add the 'typename TestFixture::'
200 // prefix. The 'typename' is required to satisfy the compiler.
201 typename TestFixture::List values;
208 For more information, see [Typed Tests](../advanced.md#typed-tests).
210 ### TYPED_TEST_SUITE_P {#TYPED_TEST_SUITE_P}
212 `TYPED_TEST_SUITE_P(`*`TestFixtureName`*`)`
214 Defines a type-parameterized test suite based on the test fixture
215 *`TestFixtureName`*. The test suite name is *`TestFixtureName`*.
217 The argument *`TestFixtureName`* is a fixture class template, parameterized by a
218 type. See [`TYPED_TEST_SUITE`](#TYPED_TEST_SUITE) for an example.
220 See also [`TYPED_TEST_P`](#TYPED_TEST_P) and
221 [Type-Parameterized Tests](../advanced.md#type-parameterized-tests) for more
224 ### TYPED_TEST_P {#TYPED_TEST_P}
227 TYPED_TEST_P(<em>TestSuiteName</em>, <em>TestName</em>) {
228 ... <em>statements</em> ...
232 Defines an individual type-parameterized test named *`TestName`* in the
233 type-parameterized test suite *`TestSuiteName`*. The test suite must be defined
234 with [`TYPED_TEST_SUITE_P`](#TYPED_TEST_SUITE_P).
236 Within the test body, the special name `TypeParam` refers to the type parameter,
237 and `TestFixture` refers to the fixture class. See [`TYPED_TEST`](#TYPED_TEST)
240 See also [`REGISTER_TYPED_TEST_SUITE_P`](#REGISTER_TYPED_TEST_SUITE_P) and
241 [Type-Parameterized Tests](../advanced.md#type-parameterized-tests) for more
244 ### REGISTER_TYPED_TEST_SUITE_P {#REGISTER_TYPED_TEST_SUITE_P}
246 `REGISTER_TYPED_TEST_SUITE_P(`*`TestSuiteName`*`,`*`TestNames...`*`)`
248 Registers the type-parameterized tests *`TestNames...`* of the test suite
249 *`TestSuiteName`*. The test suite and tests must be defined with
250 [`TYPED_TEST_SUITE_P`](#TYPED_TEST_SUITE_P) and [`TYPED_TEST_P`](#TYPED_TEST_P).
255 // Define the test suite and tests.
256 TYPED_TEST_SUITE_P(MyFixture);
257 TYPED_TEST_P(MyFixture, HasPropertyA) { ... }
258 TYPED_TEST_P(MyFixture, HasPropertyB) { ... }
260 // Register the tests in the test suite.
261 REGISTER_TYPED_TEST_SUITE_P(MyFixture, HasPropertyA, HasPropertyB);
264 See also [`INSTANTIATE_TYPED_TEST_SUITE_P`](#INSTANTIATE_TYPED_TEST_SUITE_P) and
265 [Type-Parameterized Tests](../advanced.md#type-parameterized-tests) for more
268 ### INSTANTIATE_TYPED_TEST_SUITE_P {#INSTANTIATE_TYPED_TEST_SUITE_P}
270 `INSTANTIATE_TYPED_TEST_SUITE_P(`*`InstantiationName`*`,`*`TestSuiteName`*`,`*`Types`*`)`
272 Instantiates the type-parameterized test suite *`TestSuiteName`*. The test suite
273 must be registered with
274 [`REGISTER_TYPED_TEST_SUITE_P`](#REGISTER_TYPED_TEST_SUITE_P).
276 The argument *`InstantiationName`* is a unique name for the instantiation of the
277 test suite, to distinguish between multiple instantiations. In test output, the
278 instantiation name is added as a prefix to the test suite name
281 The argument *`Types`* is a [`Types`](#Types) object representing the list of
282 types to run the tests on, for example:
285 using MyTypes = ::testing::Types<char, int, unsigned int>;
286 INSTANTIATE_TYPED_TEST_SUITE_P(MyInstantiation, MyFixture, MyTypes);
289 The type alias (`using` or `typedef`) is necessary for the
290 `INSTANTIATE_TYPED_TEST_SUITE_P` macro to parse correctly.
292 For more information, see
293 [Type-Parameterized Tests](../advanced.md#type-parameterized-tests).
295 ### FRIEND_TEST {#FRIEND_TEST}
297 `FRIEND_TEST(`*`TestSuiteName`*`,`*`TestName`*`)`
299 Within a class body, declares an individual test as a friend of the class,
300 enabling the test to access private class members.
302 If the class is defined in a namespace, then in order to be friends of the
303 class, test fixtures and tests must be defined in the exact same namespace,
304 without inline or anonymous namespaces.
306 For example, if the class definition looks like the following:
309 namespace my_namespace {
312 friend class MyClassTest;
313 FRIEND_TEST(MyClassTest, HasPropertyA);
314 FRIEND_TEST(MyClassTest, HasPropertyB);
315 ... definition of class MyClass ...
318 } // namespace my_namespace
321 Then the test code should look like:
324 namespace my_namespace {
326 class MyClassTest : public ::testing::Test {
330 TEST_F(MyClassTest, HasPropertyA) { ... }
331 TEST_F(MyClassTest, HasPropertyB) { ... }
333 } // namespace my_namespace
336 See [Testing Private Code](../advanced.md#testing-private-code) for more
339 ### SCOPED_TRACE {#SCOPED_TRACE}
341 `SCOPED_TRACE(`*`message`*`)`
343 Causes the current file name, line number, and the given message *`message`* to
344 be added to the failure message for each assertion failure that occurs in the
347 For more information, see
348 [Adding Traces to Assertions](../advanced.md#adding-traces-to-assertions).
350 See also the [`ScopedTrace` class](#ScopedTrace).
352 ### GTEST_SKIP {#GTEST_SKIP}
356 Prevents further test execution at runtime.
358 Can be used in individual test cases or in the `SetUp()` methods of test
359 environments or test fixtures (classes derived from the
360 [`Environment`](#Environment) or [`Test`](#Test) classes). If used in a global
361 test environment `SetUp()` method, it skips all tests in the test program. If
362 used in a test fixture `SetUp()` method, it skips all tests in the corresponding
365 Similar to assertions, `GTEST_SKIP` allows streaming a custom message into it.
367 See [Skipping Test Execution](../advanced.md#skipping-test-execution) for more
370 ### GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST {#GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST}
372 `GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(`*`TestSuiteName`*`)`
374 Allows the value-parameterized test suite *`TestSuiteName`* to be
377 By default, every [`TEST_P`](#TEST_P) call without a corresponding
378 [`INSTANTIATE_TEST_SUITE_P`](#INSTANTIATE_TEST_SUITE_P) call causes a failing
379 test in the test suite `GoogleTestVerification`.
380 `GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST` suppresses this failure for the
385 GoogleTest defines the following classes and types to help with writing tests.
387 ### AssertionResult {#AssertionResult}
389 `::testing::AssertionResult`
391 A class for indicating whether an assertion was successful.
393 When the assertion wasn't successful, the `AssertionResult` object stores a
394 non-empty failure message that can be retrieved with the object's `message()`
397 To create an instance of this class, use one of the factory functions
398 [`AssertionSuccess()`](#AssertionSuccess) or
399 [`AssertionFailure()`](#AssertionFailure).
401 ### AssertionException {#AssertionException}
403 `::testing::AssertionException`
405 Exception which can be thrown from
406 [`TestEventListener::OnTestPartResult`](#TestEventListener::OnTestPartResult).
408 ### EmptyTestEventListener {#EmptyTestEventListener}
410 `::testing::EmptyTestEventListener`
412 Provides an empty implementation of all methods in the
413 [`TestEventListener`](#TestEventListener) interface, such that a subclass only
414 needs to override the methods it cares about.
416 ### Environment {#Environment}
418 `::testing::Environment`
420 Represents a global test environment. See
421 [Global Set-Up and Tear-Down](../advanced.md#global-set-up-and-tear-down).
423 #### Protected Methods {#Environment-protected}
425 ##### SetUp {#Environment::SetUp}
427 `virtual void Environment::SetUp()`
429 Override this to define how to set up the environment.
431 ##### TearDown {#Environment::TearDown}
433 `virtual void Environment::TearDown()`
435 Override this to define how to tear down the environment.
437 ### ScopedTrace {#ScopedTrace}
439 `::testing::ScopedTrace`
441 An instance of this class causes a trace to be included in every test failure
442 message generated by code in the scope of the lifetime of the `ScopedTrace`
443 instance. The effect is undone with the destruction of the instance.
445 The `ScopedTrace` constructor has the following form:
448 template <typename T>
449 ScopedTrace(const char* file, int line, const T& message)
455 ::testing::ScopedTrace trace("file.cc", 123, "message");
458 The resulting trace includes the given source file path and line number, and the
459 given message. The `message` argument can be anything streamable to
462 See also [`SCOPED_TRACE`](#SCOPED_TRACE).
468 The abstract class that all tests inherit from. `Test` is not copyable.
470 #### Public Methods {#Test-public}
472 ##### SetUpTestSuite {#Test::SetUpTestSuite}
474 `static void Test::SetUpTestSuite()`
476 Performs shared setup for all tests in the test suite. GoogleTest calls
477 `SetUpTestSuite()` before running the first test in the test suite.
479 ##### TearDownTestSuite {#Test::TearDownTestSuite}
481 `static void Test::TearDownTestSuite()`
483 Performs shared teardown for all tests in the test suite. GoogleTest calls
484 `TearDownTestSuite()` after running the last test in the test suite.
486 ##### HasFatalFailure {#Test::HasFatalFailure}
488 `static bool Test::HasFatalFailure()`
490 Returns true if and only if the current test has a fatal failure.
492 ##### HasNonfatalFailure {#Test::HasNonfatalFailure}
494 `static bool Test::HasNonfatalFailure()`
496 Returns true if and only if the current test has a nonfatal failure.
498 ##### HasFailure {#Test::HasFailure}
500 `static bool Test::HasFailure()`
502 Returns true if and only if the current test has any failure, either fatal or
505 ##### IsSkipped {#Test::IsSkipped}
507 `static bool Test::IsSkipped()`
509 Returns true if and only if the current test was skipped.
511 ##### RecordProperty {#Test::RecordProperty}
513 `static void Test::RecordProperty(const std::string& key, const std::string&
515 `static void Test::RecordProperty(const std::string& key, int value)`
517 Logs a property for the current test, test suite, or entire invocation of the
518 test program. Only the last value for a given key is logged.
520 The key must be a valid XML attribute name, and cannot conflict with the ones
521 already used by GoogleTest (`name`, `file`, `line`, `status`, `time`,
522 `classname`, `type_param`, and `value_param`).
524 `RecordProperty` is `public static` so it can be called from utility functions
525 that are not members of the test fixture.
527 Calls to `RecordProperty` made during the lifespan of the test (from the moment
528 its constructor starts to the moment its destructor finishes) are output in XML
529 as attributes of the `<testcase>` element. Properties recorded from a fixture's
530 `SetUpTestSuite` or `TearDownTestSuite` methods are logged as attributes of the
531 corresponding `<testsuite>` element. Calls to `RecordProperty` made in the
532 global context (before or after invocation of `RUN_ALL_TESTS` or from the
533 `SetUp`/`TearDown` methods of registered `Environment` objects) are output as
534 attributes of the `<testsuites>` element.
536 #### Protected Methods {#Test-protected}
538 ##### SetUp {#Test::SetUp}
540 `virtual void Test::SetUp()`
542 Override this to perform test fixture setup. GoogleTest calls `SetUp()` before
543 running each individual test.
545 ##### TearDown {#Test::TearDown}
547 `virtual void Test::TearDown()`
549 Override this to perform test fixture teardown. GoogleTest calls `TearDown()`
550 after running each individual test.
552 ### TestWithParam {#TestWithParam}
554 `::testing::TestWithParam<T>`
556 A convenience class which inherits from both [`Test`](#Test) and
557 [`WithParamInterface<T>`](#WithParamInterface).
559 ### TestSuite {#TestSuite}
561 Represents a test suite. `TestSuite` is not copyable.
563 #### Public Methods {#TestSuite-public}
565 ##### name {#TestSuite::name}
567 `const char* TestSuite::name() const`
569 Gets the name of the test suite.
571 ##### type_param {#TestSuite::type_param}
573 `const char* TestSuite::type_param() const`
575 Returns the name of the parameter type, or `NULL` if this is not a typed or
576 type-parameterized test suite. See [Typed Tests](../advanced.md#typed-tests) and
577 [Type-Parameterized Tests](../advanced.md#type-parameterized-tests).
579 ##### should_run {#TestSuite::should_run}
581 `bool TestSuite::should_run() const`
583 Returns true if any test in this test suite should run.
585 ##### successful_test_count {#TestSuite::successful_test_count}
587 `int TestSuite::successful_test_count() const`
589 Gets the number of successful tests in this test suite.
591 ##### skipped_test_count {#TestSuite::skipped_test_count}
593 `int TestSuite::skipped_test_count() const`
595 Gets the number of skipped tests in this test suite.
597 ##### failed_test_count {#TestSuite::failed_test_count}
599 `int TestSuite::failed_test_count() const`
601 Gets the number of failed tests in this test suite.
603 ##### reportable_disabled_test_count {#TestSuite::reportable_disabled_test_count}
605 `int TestSuite::reportable_disabled_test_count() const`
607 Gets the number of disabled tests that will be reported in the XML report.
609 ##### disabled_test_count {#TestSuite::disabled_test_count}
611 `int TestSuite::disabled_test_count() const`
613 Gets the number of disabled tests in this test suite.
615 ##### reportable_test_count {#TestSuite::reportable_test_count}
617 `int TestSuite::reportable_test_count() const`
619 Gets the number of tests to be printed in the XML report.
621 ##### test_to_run_count {#TestSuite::test_to_run_count}
623 `int TestSuite::test_to_run_count() const`
625 Get the number of tests in this test suite that should run.
627 ##### total_test_count {#TestSuite::total_test_count}
629 `int TestSuite::total_test_count() const`
631 Gets the number of all tests in this test suite.
633 ##### Passed {#TestSuite::Passed}
635 `bool TestSuite::Passed() const`
637 Returns true if and only if the test suite passed.
639 ##### Failed {#TestSuite::Failed}
641 `bool TestSuite::Failed() const`
643 Returns true if and only if the test suite failed.
645 ##### elapsed_time {#TestSuite::elapsed_time}
647 `TimeInMillis TestSuite::elapsed_time() const`
649 Returns the elapsed time, in milliseconds.
651 ##### start_timestamp {#TestSuite::start_timestamp}
653 `TimeInMillis TestSuite::start_timestamp() const`
655 Gets the time of the test suite start, in ms from the start of the UNIX epoch.
657 ##### GetTestInfo {#TestSuite::GetTestInfo}
659 `const TestInfo* TestSuite::GetTestInfo(int i) const`
661 Returns the [`TestInfo`](#TestInfo) for the `i`-th test among all the tests. `i`
662 can range from 0 to `total_test_count() - 1`. If `i` is not in that range,
665 ##### ad_hoc_test_result {#TestSuite::ad_hoc_test_result}
667 `const TestResult& TestSuite::ad_hoc_test_result() const`
669 Returns the [`TestResult`](#TestResult) that holds test properties recorded
670 during execution of `SetUpTestSuite` and `TearDownTestSuite`.
672 ### TestInfo {#TestInfo}
674 `::testing::TestInfo`
676 Stores information about a test.
678 #### Public Methods {#TestInfo-public}
680 ##### test_suite_name {#TestInfo::test_suite_name}
682 `const char* TestInfo::test_suite_name() const`
684 Returns the test suite name.
686 ##### name {#TestInfo::name}
688 `const char* TestInfo::name() const`
690 Returns the test name.
692 ##### type_param {#TestInfo::type_param}
694 `const char* TestInfo::type_param() const`
696 Returns the name of the parameter type, or `NULL` if this is not a typed or
697 type-parameterized test. See [Typed Tests](../advanced.md#typed-tests) and
698 [Type-Parameterized Tests](../advanced.md#type-parameterized-tests).
700 ##### value_param {#TestInfo::value_param}
702 `const char* TestInfo::value_param() const`
704 Returns the text representation of the value parameter, or `NULL` if this is not
705 a value-parameterized test. See
706 [Value-Parameterized Tests](../advanced.md#value-parameterized-tests).
708 ##### file {#TestInfo::file}
710 `const char* TestInfo::file() const`
712 Returns the file name where this test is defined.
714 ##### line {#TestInfo::line}
716 `int TestInfo::line() const`
718 Returns the line where this test is defined.
720 ##### is_in_another_shard {#TestInfo::is_in_another_shard}
722 `bool TestInfo::is_in_another_shard() const`
724 Returns true if this test should not be run because it's in another shard.
726 ##### should_run {#TestInfo::should_run}
728 `bool TestInfo::should_run() const`
730 Returns true if this test should run, that is if the test is not disabled (or it
731 is disabled but the `also_run_disabled_tests` flag has been specified) and its
732 full name matches the user-specified filter.
734 GoogleTest allows the user to filter the tests by their full names. Only the
735 tests that match the filter will run. See
736 [Running a Subset of the Tests](../advanced.md#running-a-subset-of-the-tests)
737 for more information.
739 ##### is_reportable {#TestInfo::is_reportable}
741 `bool TestInfo::is_reportable() const`
743 Returns true if and only if this test will appear in the XML report.
745 ##### result {#TestInfo::result}
747 `const TestResult* TestInfo::result() const`
749 Returns the result of the test. See [`TestResult`](#TestResult).
751 ### TestParamInfo {#TestParamInfo}
753 `::testing::TestParamInfo<T>`
755 Describes a parameter to a value-parameterized test. The type `T` is the type of
758 Contains the fields `param` and `index` which hold the value of the parameter
759 and its integer index respectively.
761 ### UnitTest {#UnitTest}
763 `::testing::UnitTest`
765 This class contains information about the test program.
767 `UnitTest` is a singleton class. The only instance is created when
768 `UnitTest::GetInstance()` is first called. This instance is never deleted.
770 `UnitTest` is not copyable.
772 #### Public Methods {#UnitTest-public}
774 ##### GetInstance {#UnitTest::GetInstance}
776 `static UnitTest* UnitTest::GetInstance()`
778 Gets the singleton `UnitTest` object. The first time this method is called, a
779 `UnitTest` object is constructed and returned. Consecutive calls will return the
782 ##### original_working_dir {#UnitTest::original_working_dir}
784 `const char* UnitTest::original_working_dir() const`
786 Returns the working directory when the first [`TEST()`](#TEST) or
787 [`TEST_F()`](#TEST_F) was executed. The `UnitTest` object owns the string.
789 ##### current_test_suite {#UnitTest::current_test_suite}
791 `const TestSuite* UnitTest::current_test_suite() const`
793 Returns the [`TestSuite`](#TestSuite) object for the test that's currently
794 running, or `NULL` if no test is running.
796 ##### current_test_info {#UnitTest::current_test_info}
798 `const TestInfo* UnitTest::current_test_info() const`
800 Returns the [`TestInfo`](#TestInfo) object for the test that's currently
801 running, or `NULL` if no test is running.
803 ##### random_seed {#UnitTest::random_seed}
805 `int UnitTest::random_seed() const`
807 Returns the random seed used at the start of the current test run.
809 ##### successful_test_suite_count {#UnitTest::successful_test_suite_count}
811 `int UnitTest::successful_test_suite_count() const`
813 Gets the number of successful test suites.
815 ##### failed_test_suite_count {#UnitTest::failed_test_suite_count}
817 `int UnitTest::failed_test_suite_count() const`
819 Gets the number of failed test suites.
821 ##### total_test_suite_count {#UnitTest::total_test_suite_count}
823 `int UnitTest::total_test_suite_count() const`
825 Gets the number of all test suites.
827 ##### test_suite_to_run_count {#UnitTest::test_suite_to_run_count}
829 `int UnitTest::test_suite_to_run_count() const`
831 Gets the number of all test suites that contain at least one test that should
834 ##### successful_test_count {#UnitTest::successful_test_count}
836 `int UnitTest::successful_test_count() const`
838 Gets the number of successful tests.
840 ##### skipped_test_count {#UnitTest::skipped_test_count}
842 `int UnitTest::skipped_test_count() const`
844 Gets the number of skipped tests.
846 ##### failed_test_count {#UnitTest::failed_test_count}
848 `int UnitTest::failed_test_count() const`
850 Gets the number of failed tests.
852 ##### reportable_disabled_test_count {#UnitTest::reportable_disabled_test_count}
854 `int UnitTest::reportable_disabled_test_count() const`
856 Gets the number of disabled tests that will be reported in the XML report.
858 ##### disabled_test_count {#UnitTest::disabled_test_count}
860 `int UnitTest::disabled_test_count() const`
862 Gets the number of disabled tests.
864 ##### reportable_test_count {#UnitTest::reportable_test_count}
866 `int UnitTest::reportable_test_count() const`
868 Gets the number of tests to be printed in the XML report.
870 ##### total_test_count {#UnitTest::total_test_count}
872 `int UnitTest::total_test_count() const`
874 Gets the number of all tests.
876 ##### test_to_run_count {#UnitTest::test_to_run_count}
878 `int UnitTest::test_to_run_count() const`
880 Gets the number of tests that should run.
882 ##### start_timestamp {#UnitTest::start_timestamp}
884 `TimeInMillis UnitTest::start_timestamp() const`
886 Gets the time of the test program start, in ms from the start of the UNIX epoch.
888 ##### elapsed_time {#UnitTest::elapsed_time}
890 `TimeInMillis UnitTest::elapsed_time() const`
892 Gets the elapsed time, in milliseconds.
894 ##### Passed {#UnitTest::Passed}
896 `bool UnitTest::Passed() const`
898 Returns true if and only if the unit test passed (i.e. all test suites passed).
900 ##### Failed {#UnitTest::Failed}
902 `bool UnitTest::Failed() const`
904 Returns true if and only if the unit test failed (i.e. some test suite failed or
905 something outside of all tests failed).
907 ##### GetTestSuite {#UnitTest::GetTestSuite}
909 `const TestSuite* UnitTest::GetTestSuite(int i) const`
911 Gets the [`TestSuite`](#TestSuite) object for the `i`-th test suite among all
912 the test suites. `i` can range from 0 to `total_test_suite_count() - 1`. If `i`
913 is not in that range, returns `NULL`.
915 ##### ad_hoc_test_result {#UnitTest::ad_hoc_test_result}
917 `const TestResult& UnitTest::ad_hoc_test_result() const`
919 Returns the [`TestResult`](#TestResult) containing information on test failures
920 and properties logged outside of individual test suites.
922 ##### listeners {#UnitTest::listeners}
924 `TestEventListeners& UnitTest::listeners()`
926 Returns the list of event listeners that can be used to track events inside
927 GoogleTest. See [`TestEventListeners`](#TestEventListeners).
929 ### TestEventListener {#TestEventListener}
931 `::testing::TestEventListener`
933 The interface for tracing execution of tests. The methods below are listed in
934 the order the corresponding events are fired.
936 #### Public Methods {#TestEventListener-public}
938 ##### OnTestProgramStart {#TestEventListener::OnTestProgramStart}
940 `virtual void TestEventListener::OnTestProgramStart(const UnitTest& unit_test)`
942 Fired before any test activity starts.
944 ##### OnTestIterationStart {#TestEventListener::OnTestIterationStart}
946 `virtual void TestEventListener::OnTestIterationStart(const UnitTest& unit_test,
949 Fired before each iteration of tests starts. There may be more than one
950 iteration if `GTEST_FLAG(repeat)` is set. `iteration` is the iteration index,
953 ##### OnEnvironmentsSetUpStart {#TestEventListener::OnEnvironmentsSetUpStart}
955 `virtual void TestEventListener::OnEnvironmentsSetUpStart(const UnitTest&
958 Fired before environment set-up for each iteration of tests starts.
960 ##### OnEnvironmentsSetUpEnd {#TestEventListener::OnEnvironmentsSetUpEnd}
962 `virtual void TestEventListener::OnEnvironmentsSetUpEnd(const UnitTest&
965 Fired after environment set-up for each iteration of tests ends.
967 ##### OnTestSuiteStart {#TestEventListener::OnTestSuiteStart}
969 `virtual void TestEventListener::OnTestSuiteStart(const TestSuite& test_suite)`
971 Fired before the test suite starts.
973 ##### OnTestStart {#TestEventListener::OnTestStart}
975 `virtual void TestEventListener::OnTestStart(const TestInfo& test_info)`
977 Fired before the test starts.
979 ##### OnTestPartResult {#TestEventListener::OnTestPartResult}
981 `virtual void TestEventListener::OnTestPartResult(const TestPartResult&
984 Fired after a failed assertion or a `SUCCEED()` invocation. If you want to throw
985 an exception from this function to skip to the next test, it must be an
986 [`AssertionException`](#AssertionException) or inherited from it.
988 ##### OnTestEnd {#TestEventListener::OnTestEnd}
990 `virtual void TestEventListener::OnTestEnd(const TestInfo& test_info)`
992 Fired after the test ends.
994 ##### OnTestSuiteEnd {#TestEventListener::OnTestSuiteEnd}
996 `virtual void TestEventListener::OnTestSuiteEnd(const TestSuite& test_suite)`
998 Fired after the test suite ends.
1000 ##### OnEnvironmentsTearDownStart {#TestEventListener::OnEnvironmentsTearDownStart}
1002 `virtual void TestEventListener::OnEnvironmentsTearDownStart(const UnitTest&
1005 Fired before environment tear-down for each iteration of tests starts.
1007 ##### OnEnvironmentsTearDownEnd {#TestEventListener::OnEnvironmentsTearDownEnd}
1009 `virtual void TestEventListener::OnEnvironmentsTearDownEnd(const UnitTest&
1012 Fired after environment tear-down for each iteration of tests ends.
1014 ##### OnTestIterationEnd {#TestEventListener::OnTestIterationEnd}
1016 `virtual void TestEventListener::OnTestIterationEnd(const UnitTest& unit_test,
1019 Fired after each iteration of tests finishes.
1021 ##### OnTestProgramEnd {#TestEventListener::OnTestProgramEnd}
1023 `virtual void TestEventListener::OnTestProgramEnd(const UnitTest& unit_test)`
1025 Fired after all test activities have ended.
1027 ### TestEventListeners {#TestEventListeners}
1029 `::testing::TestEventListeners`
1031 Lets users add listeners to track events in GoogleTest.
1033 #### Public Methods {#TestEventListeners-public}
1035 ##### Append {#TestEventListeners::Append}
1037 `void TestEventListeners::Append(TestEventListener* listener)`
1039 Appends an event listener to the end of the list. GoogleTest assumes ownership
1040 of the listener (i.e. it will delete the listener when the test program
1043 ##### Release {#TestEventListeners::Release}
1045 `TestEventListener* TestEventListeners::Release(TestEventListener* listener)`
1047 Removes the given event listener from the list and returns it. It then becomes
1048 the caller's responsibility to delete the listener. Returns `NULL` if the
1049 listener is not found in the list.
1051 ##### default_result_printer {#TestEventListeners::default_result_printer}
1053 `TestEventListener* TestEventListeners::default_result_printer() const`
1055 Returns the standard listener responsible for the default console output. Can be
1056 removed from the listeners list to shut down default console output. Note that
1057 removing this object from the listener list with
1058 [`Release()`](#TestEventListeners::Release) transfers its ownership to the
1059 caller and makes this function return `NULL` the next time.
1061 ##### default_xml_generator {#TestEventListeners::default_xml_generator}
1063 `TestEventListener* TestEventListeners::default_xml_generator() const`
1065 Returns the standard listener responsible for the default XML output controlled
1066 by the `--gtest_output=xml` flag. Can be removed from the listeners list by
1067 users who want to shut down the default XML output controlled by this flag and
1068 substitute it with custom one. Note that removing this object from the listener
1069 list with [`Release()`](#TestEventListeners::Release) transfers its ownership to
1070 the caller and makes this function return `NULL` the next time.
1072 ### TestPartResult {#TestPartResult}
1074 `::testing::TestPartResult`
1076 A copyable object representing the result of a test part (i.e. an assertion or
1077 an explicit `FAIL()`, `ADD_FAILURE()`, or `SUCCESS()`).
1079 #### Public Methods {#TestPartResult-public}
1081 ##### type {#TestPartResult::type}
1083 `Type TestPartResult::type() const`
1085 Gets the outcome of the test part.
1087 The return type `Type` is an enum defined as follows:
1091 kSuccess, // Succeeded.
1092 kNonFatalFailure, // Failed but the test can continue.
1093 kFatalFailure, // Failed and the test should be terminated.
1098 ##### file_name {#TestPartResult::file_name}
1100 `const char* TestPartResult::file_name() const`
1102 Gets the name of the source file where the test part took place, or `NULL` if
1105 ##### line_number {#TestPartResult::line_number}
1107 `int TestPartResult::line_number() const`
1109 Gets the line in the source file where the test part took place, or `-1` if it's
1112 ##### summary {#TestPartResult::summary}
1114 `const char* TestPartResult::summary() const`
1116 Gets the summary of the failure message.
1118 ##### message {#TestPartResult::message}
1120 `const char* TestPartResult::message() const`
1122 Gets the message associated with the test part.
1124 ##### skipped {#TestPartResult::skipped}
1126 `bool TestPartResult::skipped() const`
1128 Returns true if and only if the test part was skipped.
1130 ##### passed {#TestPartResult::passed}
1132 `bool TestPartResult::passed() const`
1134 Returns true if and only if the test part passed.
1136 ##### nonfatally_failed {#TestPartResult::nonfatally_failed}
1138 `bool TestPartResult::nonfatally_failed() const`
1140 Returns true if and only if the test part non-fatally failed.
1142 ##### fatally_failed {#TestPartResult::fatally_failed}
1144 `bool TestPartResult::fatally_failed() const`
1146 Returns true if and only if the test part fatally failed.
1148 ##### failed {#TestPartResult::failed}
1150 `bool TestPartResult::failed() const`
1152 Returns true if and only if the test part failed.
1154 ### TestProperty {#TestProperty}
1156 `::testing::TestProperty`
1158 A copyable object representing a user-specified test property which can be
1159 output as a key/value string pair.
1161 #### Public Methods {#TestProperty-public}
1165 `const char* key() const`
1167 Gets the user-supplied key.
1169 ##### value {#value}
1171 `const char* value() const`
1173 Gets the user-supplied value.
1175 ##### SetValue {#SetValue}
1177 `void SetValue(const std::string& new_value)`
1179 Sets a new value, overriding the previous one.
1181 ### TestResult {#TestResult}
1183 `::testing::TestResult`
1185 Contains information about the result of a single test.
1187 `TestResult` is not copyable.
1189 #### Public Methods {#TestResult-public}
1191 ##### total_part_count {#TestResult::total_part_count}
1193 `int TestResult::total_part_count() const`
1195 Gets the number of all test parts. This is the sum of the number of successful
1196 test parts and the number of failed test parts.
1198 ##### test_property_count {#TestResult::test_property_count}
1200 `int TestResult::test_property_count() const`
1202 Returns the number of test properties.
1204 ##### Passed {#TestResult::Passed}
1206 `bool TestResult::Passed() const`
1208 Returns true if and only if the test passed (i.e. no test part failed).
1210 ##### Skipped {#TestResult::Skipped}
1212 `bool TestResult::Skipped() const`
1214 Returns true if and only if the test was skipped.
1216 ##### Failed {#TestResult::Failed}
1218 `bool TestResult::Failed() const`
1220 Returns true if and only if the test failed.
1222 ##### HasFatalFailure {#TestResult::HasFatalFailure}
1224 `bool TestResult::HasFatalFailure() const`
1226 Returns true if and only if the test fatally failed.
1228 ##### HasNonfatalFailure {#TestResult::HasNonfatalFailure}
1230 `bool TestResult::HasNonfatalFailure() const`
1232 Returns true if and only if the test has a non-fatal failure.
1234 ##### elapsed_time {#TestResult::elapsed_time}
1236 `TimeInMillis TestResult::elapsed_time() const`
1238 Returns the elapsed time, in milliseconds.
1240 ##### start_timestamp {#TestResult::start_timestamp}
1242 `TimeInMillis TestResult::start_timestamp() const`
1244 Gets the time of the test case start, in ms from the start of the UNIX epoch.
1246 ##### GetTestPartResult {#TestResult::GetTestPartResult}
1248 `const TestPartResult& TestResult::GetTestPartResult(int i) const`
1250 Returns the [`TestPartResult`](#TestPartResult) for the `i`-th test part result
1251 among all the results. `i` can range from 0 to `total_part_count() - 1`. If `i`
1252 is not in that range, aborts the program.
1254 ##### GetTestProperty {#TestResult::GetTestProperty}
1256 `const TestProperty& TestResult::GetTestProperty(int i) const`
1258 Returns the [`TestProperty`](#TestProperty) object for the `i`-th test property.
1259 `i` can range from 0 to `test_property_count() - 1`. If `i` is not in that
1260 range, aborts the program.
1262 ### TimeInMillis {#TimeInMillis}
1264 `::testing::TimeInMillis`
1266 An integer type representing time in milliseconds.
1270 `::testing::Types<T...>`
1272 Represents a list of types for use in typed tests and type-parameterized tests.
1274 The template argument `T...` can be any number of types, for example:
1277 ::testing::Types<char, int, unsigned int>
1280 See [Typed Tests](../advanced.md#typed-tests) and
1281 [Type-Parameterized Tests](../advanced.md#type-parameterized-tests) for more
1284 ### WithParamInterface {#WithParamInterface}
1286 `::testing::WithParamInterface<T>`
1288 The pure interface class that all value-parameterized tests inherit from.
1290 A value-parameterized test fixture class must inherit from both [`Test`](#Test)
1291 and `WithParamInterface`. In most cases that just means inheriting from
1292 [`TestWithParam`](#TestWithParam), but more complicated test hierarchies may
1293 need to inherit from `Test` and `WithParamInterface` at different levels.
1295 This interface defines the type alias `ParamType` for the parameter type `T` and
1296 has support for accessing the test parameter value via the `GetParam()` method:
1299 static const ParamType& GetParam()
1302 For more information, see
1303 [Value-Parameterized Tests](../advanced.md#value-parameterized-tests).
1307 GoogleTest defines the following functions to help with writing and running
1310 ### InitGoogleTest {#InitGoogleTest}
1312 `void ::testing::InitGoogleTest(int* argc, char** argv)` \
1313 `void ::testing::InitGoogleTest(int* argc, wchar_t** argv)` \
1314 `void ::testing::InitGoogleTest()`
1316 Initializes GoogleTest. This must be called before calling
1317 [`RUN_ALL_TESTS()`](#RUN_ALL_TESTS). In particular, it parses the command line
1318 for the flags that GoogleTest recognizes. Whenever a GoogleTest flag is seen, it
1319 is removed from `argv`, and `*argc` is decremented.
1321 No value is returned. Instead, the GoogleTest flag variables are updated.
1323 The `InitGoogleTest(int* argc, wchar_t** argv)` overload can be used in Windows
1324 programs compiled in `UNICODE` mode.
1326 The argument-less `InitGoogleTest()` overload can be used on Arduino/embedded
1327 platforms where there is no `argc`/`argv`.
1329 ### AddGlobalTestEnvironment {#AddGlobalTestEnvironment}
1331 `Environment* ::testing::AddGlobalTestEnvironment(Environment* env)`
1333 Adds a test environment to the test program. Must be called before
1334 [`RUN_ALL_TESTS()`](#RUN_ALL_TESTS) is called. See
1335 [Global Set-Up and Tear-Down](../advanced.md#global-set-up-and-tear-down) for
1338 See also [`Environment`](#Environment).
1340 ### RegisterTest {#RegisterTest}
1343 template <typename Factory>
1344 TestInfo* ::testing::RegisterTest(const char* test_suite_name, const char* test_name,
1345 const char* type_param, const char* value_param,
1346 const char* file, int line, Factory factory)
1349 Dynamically registers a test with the framework.
1351 The `factory` argument is a factory callable (move-constructible) object or
1352 function pointer that creates a new instance of the `Test` object. It handles
1353 ownership to the caller. The signature of the callable is `Fixture*()`, where
1354 `Fixture` is the test fixture class for the test. All tests registered with the
1355 same `test_suite_name` must return the same fixture type. This is checked at
1358 The framework will infer the fixture class from the factory and will call the
1359 `SetUpTestSuite` and `TearDownTestSuite` methods for it.
1361 Must be called before [`RUN_ALL_TESTS()`](#RUN_ALL_TESTS) is invoked, otherwise
1362 behavior is undefined.
1365 [Registering tests programmatically](../advanced.md#registering-tests-programmatically)
1366 for more information.
1368 ### RUN_ALL_TESTS {#RUN_ALL_TESTS}
1370 `int RUN_ALL_TESTS()`
1372 Use this function in `main()` to run all tests. It returns `0` if all tests are
1373 successful, or `1` otherwise.
1375 `RUN_ALL_TESTS()` should be invoked after the command line has been parsed by
1376 [`InitGoogleTest()`](#InitGoogleTest).
1378 This function was formerly a macro; thus, it is in the global namespace and has
1381 ### AssertionSuccess {#AssertionSuccess}
1383 `AssertionResult ::testing::AssertionSuccess()`
1385 Creates a successful assertion result. See
1386 [`AssertionResult`](#AssertionResult).
1388 ### AssertionFailure {#AssertionFailure}
1390 `AssertionResult ::testing::AssertionFailure()`
1392 Creates a failed assertion result. Use the `<<` operator to store a failure
1396 ::testing::AssertionFailure() << "My failure message";
1399 See [`AssertionResult`](#AssertionResult).
1401 ### StaticAssertTypeEq {#StaticAssertTypeEq}
1403 `::testing::StaticAssertTypeEq<T1, T2>()`
1405 Compile-time assertion for type equality. Compiles if and only if `T1` and `T2`
1406 are the same type. The value it returns is irrelevant.
1408 See [Type Assertions](../advanced.md#type-assertions) for more information.
1410 ### PrintToString {#PrintToString}
1412 `std::string ::testing::PrintToString(x)`
1414 Prints any value `x` using GoogleTest's value printer.
1417 [Teaching GoogleTest How to Print Your Values](../advanced.md#teaching-googletest-how-to-print-your-values)
1418 for more information.
1420 ### PrintToStringParamName {#PrintToStringParamName}
1422 `std::string ::testing::PrintToStringParamName(TestParamInfo<T>& info)`
1424 A built-in parameterized test name generator which returns the result of
1425 [`PrintToString`](#PrintToString) called on `info.param`. Does not work when the
1426 test parameter is a `std::string` or C string. See
1427 [Specifying Names for Value-Parameterized Test Parameters](../advanced.md#specifying-names-for-value-parameterized-test-parameters)
1428 for more information.
1430 See also [`TestParamInfo`](#TestParamInfo) and
1431 [`INSTANTIATE_TEST_SUITE_P`](#INSTANTIATE_TEST_SUITE_P).