gtest-typed-test.h

Go to the documentation of this file.

// 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.
 
 
// GOOGLETEST_CM0001 DO NOT DELETE
 
#ifndef GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
#define GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
 
// This header implements typed tests and type-parameterized tests.
 
// Typed (aka type-driven) tests repeat the same test for types in a
// list.  You must know which types you want to test with when writing
// typed tests. Here's how you do it:
 
#if 0
 
// First, define a fixture class template.  It should be parameterized
// by a type.  Remember to derive it from testing::Test.
template <typename T>
class FooTest : public testing::Test {
 public:
  ...
  typedef std::list<T> List;
  static T shared_;
  T value_;
};
 
// Next, associate a list of types with the test suite, which will be
// repeated for each type in the list.  The typedef is necessary for
// the macro to parse correctly.
typedef testing::Types<char, int, unsigned int> MyTypes;
TYPED_TEST_SUITE(FooTest, MyTypes);
 
// If the type list contains only one type, you can write that type
// directly without Types<...>:
//   TYPED_TEST_SUITE(FooTest, int);
 
// Then, use TYPED_TEST() instead of TEST_F() to define as many typed
// tests for this test suite as you want.
TYPED_TEST(FooTest, DoesBlah) {
  // Inside a test, refer to TypeParam to get the type parameter.
  // Since we are inside a derived class template, C++ requires use to
  // visit the members of FooTest 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.
  typename TestFixture::List values;
  values.push_back(n);
  ...
}
 
TYPED_TEST(FooTest, HasPropertyA) { ... }
 
// TYPED_TEST_SUITE takes an optional third argument which allows to specify a
// class that generates custom test name suffixes based on the type. This should
// be a class which has a static template function GetName(int index) returning
// a string for each type. The provided integer index equals the index of the
// type in the provided type list. In many cases the index can be ignored.
//
// For example:
//   class MyTypeNames {
//    public:
//     template <typename T>
//     static std::string GetName(int) {
//       if (std::is_same<T, char>()) return "char";
//       if (std::is_same<T, int>()) return "int";
//       if (std::is_same<T, unsigned int>()) return "unsignedInt";
//     }
//   };
//   TYPED_TEST_SUITE(FooTest, MyTypes, MyTypeNames);
 
#endif  // 0
 
// Type-parameterized tests are abstract test patterns parameterized
// by a type.  Compared with typed tests, type-parameterized tests
// allow you to define the test pattern without knowing what the type
// parameters are.  The defined pattern can be instantiated with
// different types any number of times, in any number of translation
// units.
//
// If you are designing an interface or concept, you can define a
// suite of type-parameterized tests to verify properties that any
// valid implementation of the interface/concept should have.  Then,
// each implementation can easily instantiate the test suite to verify
// that it conforms to the requirements, without having to write
// similar tests repeatedly.  Here's an example:
 
#if 0
 
// First, define a fixture class template.  It should be parameterized
// by a type.  Remember to derive it from testing::Test.
template <typename T>
class FooTest : public testing::Test {
  ...
};
 
// Next, declare that you will define a type-parameterized test suite
// (the _P suffix is for "parameterized" or "pattern", whichever you
// prefer):
TYPED_TEST_SUITE_P(FooTest);
 
// Then, use TYPED_TEST_P() to define as many type-parameterized tests
// for this type-parameterized test suite as you want.
TYPED_TEST_P(FooTest, DoesBlah) {
  // Inside a test, refer to TypeParam to get the type parameter.
  TypeParam n = 0;
  ...
}
 
TYPED_TEST_P(FooTest, HasPropertyA) { ... }
 
// Now the tricky part: you need to register all test patterns before
// you can instantiate them.  The first argument of the macro is the
// test suite name; the rest are the names of the tests in this test
// case.
REGISTER_TYPED_TEST_SUITE_P(FooTest,
                            DoesBlah, HasPropertyA);
 
// Finally, you are free to instantiate the pattern with the types you
// want.  If you put the above code in a header file, you can #include
// it in multiple C++ source files and instantiate it multiple times.
//
// To distinguish different instances of the pattern, the first
// argument to the INSTANTIATE_* macro is a prefix that will be added
// to the actual test suite name.  Remember to pick unique prefixes for
// different instances.
typedef testing::Types<char, int, unsigned int> MyTypes;
INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
 
// If the type list contains only one type, you can write that type
// directly without Types<...>:
//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
//
// Similar to the optional argument of TYPED_TEST_SUITE above,
// INSTANTIATE_TEST_SUITE_P takes an optional fourth argument which allows to
// generate custom names.
//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes, MyTypeNames);
 
#endif  // 0
 
#include "gtest/internal/gtest-port.h"
#include "gtest/internal/gtest-type-util.h"
 
// Implements typed tests.
 
#if GTEST_HAS_TYPED_TEST
 
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// Expands to the name of the typedef for the type parameters of the
// given test suite.
#define GTEST_TYPE_PARAMS_(TestSuiteName) gtest_type_params_##TestSuiteName##_
 
// Expands to the name of the typedef for the NameGenerator, responsible for
// creating the suffixes of the name.
#define GTEST_NAME_GENERATOR_(TestSuiteName) \
  gtest_type_params_##TestSuiteName##_NameGenerator
 
// The 'Types' template argument below must have spaces around it
// since some compilers may choke on '>>' when passing a template
// instance (e.g. Types<int>)
#define TYPED_TEST_SUITE(CaseName, Types, ...)                           \
  typedef ::testing::internal::TypeList<Types>::type GTEST_TYPE_PARAMS_( \
      CaseName);                                                         \
  typedef ::testing::internal::NameGeneratorSelector<__VA_ARGS__>::type  \
      GTEST_NAME_GENERATOR_(CaseName)
 
# define TYPED_TEST(CaseName, TestName)                                       \
  template <typename gtest_TypeParam_>                                        \
  class GTEST_TEST_CLASS_NAME_(CaseName, TestName)                            \
      : public CaseName<gtest_TypeParam_> {                                   \
   private:                                                                   \
    typedef CaseName<gtest_TypeParam_> TestFixture;                           \
    typedef gtest_TypeParam_ TypeParam;                                       \
    virtual void TestBody();                                                  \
  };                                                                          \
  static bool gtest_##CaseName##_##TestName##_registered_                     \
        GTEST_ATTRIBUTE_UNUSED_ =                                             \
      ::testing::internal::TypeParameterizedTest<                             \
          CaseName,                                                           \
          ::testing::internal::TemplateSel<GTEST_TEST_CLASS_NAME_(CaseName,   \
                                                                  TestName)>, \
          GTEST_TYPE_PARAMS_(                                                 \
              CaseName)>::Register("",                                        \
                                   ::testing::internal::CodeLocation(         \
                                       __FILE__, __LINE__),                   \
                                   #CaseName, #TestName, 0,                   \
                                   ::testing::internal::GenerateNames<        \
                                       GTEST_NAME_GENERATOR_(CaseName),       \
                                       GTEST_TYPE_PARAMS_(CaseName)>());      \
  template <typename gtest_TypeParam_>                                        \
  void GTEST_TEST_CLASS_NAME_(CaseName,                                       \
                              TestName)<gtest_TypeParam_>::TestBody()
 
// Legacy API is deprecated but still available
#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
#define TYPED_TEST_CASE                                                \
  static_assert(::testing::internal::TypedTestCaseIsDeprecated(), ""); \
  TYPED_TEST_SUITE
#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
 
#endif  // GTEST_HAS_TYPED_TEST
 
// Implements type-parameterized tests.
 
#if GTEST_HAS_TYPED_TEST_P
 
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// Expands to the namespace name that the type-parameterized tests for
// the given type-parameterized test suite are defined in.  The exact
// name of the namespace is subject to change without notice.
#define GTEST_SUITE_NAMESPACE_(TestSuiteName) gtest_suite_##TestSuiteName##_
 
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// Expands to the name of the variable used to remember the names of
// the defined tests in the given test suite.
#define GTEST_TYPED_TEST_SUITE_P_STATE_(TestSuiteName) \
  gtest_typed_test_suite_p_state_##TestSuiteName##_
 
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE DIRECTLY.
//
// Expands to the name of the variable used to remember the names of
// the registered tests in the given test suite.
#define GTEST_REGISTERED_TEST_NAMES_(TestSuiteName) \
  gtest_registered_test_names_##TestSuiteName##_
 
// The variables defined in the type-parameterized test macros are
// static as typically these macros are used in a .h file that can be
// #included in multiple translation units linked together.
#define TYPED_TEST_SUITE_P(SuiteName)              \
  static ::testing::internal::TypedTestSuitePState \
      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName)
 
// Legacy API is deprecated but still available
#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
#define TYPED_TEST_CASE_P                                                 \
  static_assert(::testing::internal::TypedTestCase_P_IsDeprecated(), ""); \
  TYPED_TEST_SUITE_P
#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
 
#define TYPED_TEST_P(SuiteName, TestName)                             \
  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                       \
    template <typename gtest_TypeParam_>                              \
    class TestName : public SuiteName<gtest_TypeParam_> {             \
     private:                                                         \
      typedef SuiteName<gtest_TypeParam_> TestFixture;                \
      typedef gtest_TypeParam_ TypeParam;                             \
      virtual void TestBody();                                        \
    };                                                                \
    static bool gtest_##TestName##_defined_ GTEST_ATTRIBUTE_UNUSED_ = \
        GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).AddTestName(       \
            __FILE__, __LINE__, #SuiteName, #TestName);               \
  }                                                                   \
  template <typename gtest_TypeParam_>                                \
  void GTEST_SUITE_NAMESPACE_(                                        \
      SuiteName)::TestName<gtest_TypeParam_>::TestBody()
 
#define REGISTER_TYPED_TEST_SUITE_P(SuiteName, ...)                            \
  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                                \
    typedef ::testing::internal::Templates<__VA_ARGS__>::type gtest_AllTests_; \
  }                                                                            \
  static const char* const GTEST_REGISTERED_TEST_NAMES_(                       \
      SuiteName) GTEST_ATTRIBUTE_UNUSED_ =                                     \
      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).VerifyRegisteredTestNames(    \
          __FILE__, __LINE__, #__VA_ARGS__)
 
// Legacy API is deprecated but still available
#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
#define REGISTER_TYPED_TEST_CASE_P                                           \
  static_assert(::testing::internal::RegisterTypedTestCase_P_IsDeprecated(), \
                "");                                                         \
  REGISTER_TYPED_TEST_SUITE_P
#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
 
// The 'Types' template argument below must have spaces around it
// since some compilers may choke on '>>' when passing a template
// instance (e.g. Types<int>)
#define INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, SuiteName, Types, ...)       \
  static bool gtest_##Prefix##_##SuiteName GTEST_ATTRIBUTE_UNUSED_ =        \
      ::testing::internal::TypeParameterizedTestSuite<                      \
          SuiteName, GTEST_SUITE_NAMESPACE_(SuiteName)::gtest_AllTests_,    \
          ::testing::internal::TypeList<Types>::type>::                     \
          Register(#Prefix,                                                 \
                   ::testing::internal::CodeLocation(__FILE__, __LINE__),   \
                   &GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName), #SuiteName, \
                   GTEST_REGISTERED_TEST_NAMES_(SuiteName),                 \
                   ::testing::internal::GenerateNames<                      \
                       ::testing::internal::NameGeneratorSelector<          \
                           __VA_ARGS__>::type,                              \
                       ::testing::internal::TypeList<Types>::type>())
 
// Legacy API is deprecated but still available
#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
#define INSTANTIATE_TYPED_TEST_CASE_P                                      \
  static_assert(                                                           \
      ::testing::internal::InstantiateTypedTestCase_P_IsDeprecated(), ""); \
  INSTANTIATE_TYPED_TEST_SUITE_P
#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
 
#endif  // GTEST_HAS_TYPED_TEST_P
 
#endif  // GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_