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 // Copyright 2007, 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.
 
 // Utilities for testing Google Test itself and code that uses Google Test
 // (e.g. frameworks built on top of Google Test).
 
 #ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
 #define GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
 
 #include "gtest/gtest.h"
 
 GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
 /* class A needs to have dll-interface to be used by clients of class B */)
 
 namespace testing {
 
 // This helper class can be used to mock out Google Test failure reporting
 // so that we can test Google Test or code that builds on Google Test.
 //
 // An object of this class appends a TestPartResult object to the
 // TestPartResultArray object given in the constructor whenever a Google Test
 // failure is reported. It can either intercept only failures that are
 // generated in the same thread that created this object or it can intercept
 // all generated failures. The scope of this mock object can be controlled with
 // the second argument to the two arguments constructor.
 class GTEST_API_ ScopedFakeTestPartResultReporter
     : public TestPartResultReporterInterface {
  public:
   // The two possible mocking modes of this object.
   enum InterceptMode {
     INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
     INTERCEPT_ALL_THREADS           // Intercepts all failures.
   };
 
   // The c'tor sets this object as the test part result reporter used
   // by Google Test.  The 'result' parameter specifies where to report the
   // results. This reporter will only catch failures generated in the current
   // thread. DEPRECATED
   explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
 
   // Same as above, but you can choose the interception scope of this object.
   ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
                                    TestPartResultArray* result);
 
   // The d'tor restores the previous test part result reporter.
   ~ScopedFakeTestPartResultReporter() override;
 
   // Appends the TestPartResult object to the TestPartResultArray
   // received in the constructor.
   //
   // This method is from the TestPartResultReporterInterface
   // interface.
   void ReportTestPartResult(const TestPartResult& result) override;
 
  private:
   void Init();
 
   const InterceptMode intercept_mode_;
   TestPartResultReporterInterface* old_reporter_;
   TestPartResultArray* const result_;
 
   ScopedFakeTestPartResultReporter(const ScopedFakeTestPartResultReporter&) =
       delete;
   ScopedFakeTestPartResultReporter& operator=(
       const ScopedFakeTestPartResultReporter&) = delete;
 };
 
 namespace internal {
 
 // A helper class for implementing EXPECT_FATAL_FAILURE() and
 // EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
 // TestPartResultArray contains exactly one failure that has the given
 // type and contains the given substring.  If that's not the case, a
 // non-fatal failure will be generated.
 class GTEST_API_ SingleFailureChecker {
  public:
   // The constructor remembers the arguments.
   SingleFailureChecker(const TestPartResultArray* results,
                        TestPartResult::Type type, const std::string& substr);
   ~SingleFailureChecker();
 
  private:
   const TestPartResultArray* const results_;
   const TestPartResult::Type type_;
   const std::string substr_;
 
   SingleFailureChecker(const SingleFailureChecker&) = delete;
   SingleFailureChecker& operator=(const SingleFailureChecker&) = delete;
 };
 
 }  // namespace internal
 
 }  // namespace testing
 
 GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
 
 // A set of macros for testing Google Test assertions or code that's expected
 // to generate Google Test fatal failures (e.g. a failure from an ASSERT_EQ, but
 // not a non-fatal failure, as from EXPECT_EQ).  It verifies that the given
 // statement will cause exactly one fatal Google Test failure with 'substr'
 // being part of the failure message.
 //
 // There are two different versions of this macro. EXPECT_FATAL_FAILURE only
 // affects and considers failures generated in the current thread and
 // EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
 //
 // The verification of the assertion is done correctly even when the statement
 // throws an exception or aborts the current function.
 //
 // Known restrictions:
 //   - 'statement' cannot reference local non-static variables or
 //     non-static members of the current object.
 //   - 'statement' cannot return a value.
 //   - You cannot stream a failure message to this macro.
 //
 // Note that even though the implementations of the following two
 // macros are much alike, we cannot refactor them to use a common
 // helper macro, due to some peculiarity in how the preprocessor
 // works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
 // gtest_unittest.cc will fail to compile if we do that.
 #define EXPECT_FATAL_FAILURE(statement, substr)                               \
   do {                                                                        \
     class GTestExpectFatalFailureHelper {                                     \
      public:                                                                  \
       static void Execute() { statement; }                                    \
     };                                                                        \
     ::testing::TestPartResultArray gtest_failures;                            \
     ::testing::internal::SingleFailureChecker gtest_checker(                  \
         &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr)); \
     {                                                                         \
       ::testing::ScopedFakeTestPartResultReporter gtest_reporter(             \
           ::testing::ScopedFakeTestPartResultReporter::                       \
               INTERCEPT_ONLY_CURRENT_THREAD,                                  \
           &gtest_failures);                                                   \
       GTestExpectFatalFailureHelper::Execute();                               \
     }                                                                         \
   } while (::testing::internal::AlwaysFalse())
 
 #define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr)                \
   do {                                                                        \
     class GTestExpectFatalFailureHelper {                                     \
      public:                                                                  \
       static void Execute() { statement; }                                    \
     };                                                                        \
     ::testing::TestPartResultArray gtest_failures;                            \
     ::testing::internal::SingleFailureChecker gtest_checker(                  \
         &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr)); \
     {                                                                         \
       ::testing::ScopedFakeTestPartResultReporter gtest_reporter(             \
           ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
           &gtest_failures);                                                   \
       GTestExpectFatalFailureHelper::Execute();                               \
     }                                                                         \
   } while (::testing::internal::AlwaysFalse())
 
 // A macro for testing Google Test assertions or code that's expected to
 // generate Google Test non-fatal failures (e.g. a failure from an EXPECT_EQ,
 // but not from an ASSERT_EQ). It asserts that the given statement will cause
 // exactly one non-fatal Google Test failure with 'substr' being part of the
 // failure message.
 //
 // There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
 // affects and considers failures generated in the current thread and
 // EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
 //
 // 'statement' is allowed to reference local variables and members of
 // the current object.
 //
 // The verification of the assertion is done correctly even when the statement
 // throws an exception or aborts the current function.
 //
 // Known restrictions:
 //   - You cannot stream a failure message to this macro.
 //
 // Note that even though the implementations of the following two
 // macros are much alike, we cannot refactor them to use a common
 // helper macro, due to some peculiarity in how the preprocessor
 // works.  If we do that, the code won't compile when the user gives
 // EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
 // expands to code containing an unprotected comma.  The
 // AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
 // catches that.
 //
 // For the same reason, we have to write
 //   if (::testing::internal::AlwaysTrue()) { statement; }
 // instead of
 //   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
 // to avoid an MSVC warning on unreachable code.
 #define EXPECT_NONFATAL_FAILURE(statement, substr)                    \
   do {                                                                \
     ::testing::TestPartResultArray gtest_failures;                    \
     ::testing::internal::SingleFailureChecker gtest_checker(          \
         &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
         (substr));                                                    \
     {                                                                 \
       ::testing::ScopedFakeTestPartResultReporter gtest_reporter(     \
           ::testing::ScopedFakeTestPartResultReporter::               \
               INTERCEPT_ONLY_CURRENT_THREAD,                          \
           &gtest_failures);                                           \
       if (::testing::internal::AlwaysTrue()) {                        \
         statement;                                                    \
       }                                                               \
     }                                                                 \
   } while (::testing::internal::AlwaysFalse())
 
 #define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr)             \
   do {                                                                        \
     ::testing::TestPartResultArray gtest_failures;                            \
     ::testing::internal::SingleFailureChecker gtest_checker(                  \
         &gtest_failures, ::testing::TestPartResult::kNonFatalFailure,         \
         (substr));                                                            \
     {                                                                         \
       ::testing::ScopedFakeTestPartResultReporter gtest_reporter(             \
           ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
           &gtest_failures);                                                   \
       if (::testing::internal::AlwaysTrue()) {                                \
         statement;                                                            \
       }                                                                       \
     }                                                                         \
   } while (::testing::internal::AlwaysFalse())
 
 #endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_

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