text: // Copyright 2009 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
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  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  //
  // Author: vladl@google.com (Vlad Losev)
  
  // This sample shows how to use Google Test listener API to implement
  // an alternative console output and how to use the UnitTest reflection API
  // to enumerate test cases and tests and to inspect their results.
  
  #include <stdio.h>
  
  #include "gtest/gtest.h"
  
  using ::testing::EmptyTestEventListener;
  using ::testing::InitGoogleTest;
  using ::testing::Test;
  using ::testing::TestCase;
  using ::testing::TestEventListeners;
  using ::testing::TestInfo;
  using ::testing::TestPartResult;
  using ::testing::UnitTest;
  
  namespace {
  
  // Provides alternative output mode which produces minimal amount of
  // information about tests.
  class TersePrinter : public EmptyTestEventListener {
   private:
    // Called before any test activity starts.
    virtual void OnTestProgramStart(const UnitTest& /* unit_test */) {}
  
    // Called after all test activities have ended.
    virtual void OnTestProgramEnd(const UnitTest& unit_test) {
      fprintf(stdout, "TEST %s\n", unit_test.Passed() ? "PASSED" : "FAILED");
      fflush(stdout);
    }
  
    // Called before a test starts.
    virtual void OnTestStart(const TestInfo& test_info) {
      fprintf(stdout,
              "*** Test %s.%s starting.\n",
              test_info.test_case_name(),
              test_info.name());
      fflush(stdout);
    }
  
    // Called after a failed assertion or a SUCCEED() invocation.
    virtual void OnTestPartResult(const TestPartResult& test_part_result) {
      fprintf(stdout,
              "%s in %s:%d\n%s\n",
              test_part_result.failed() ? "*** Failure" : "Success",
              test_part_result.file_name(),
              test_part_result.line_number(),
              test_part_result.summary());
      fflush(stdout);
    }
  
    // Called after a test ends.
    virtual void OnTestEnd(const TestInfo& test_info) {
      fprintf(stdout,
              "*** Test %s.%s ending.\n",
              test_info.test_case_name(),
              test_info.name());
      fflush(stdout);
    }
  };  // class TersePrinter
  
  TEST(CustomOutputTest, PrintsMessage) {
    printf("Printing something from the test body...\n");
  }
  
  TEST(CustomOutputTest, Succeeds) {
    SUCCEED() << "SUCCEED() has been invoked from here";
  }
  
  TEST(CustomOutputTest, Fails) {
    EXPECT_EQ(1, 2)
        << "This test fails in order to demonstrate alternative failure messages";
  }
  
  }  // namespace
  
  int main(int argc, char **argv) {
    InitGoogleTest(&argc, argv);
  
    bool terse_output = false;
    if (argc > 1 && strcmp(argv[1], "--terse_output") == 0 )
      terse_output = true;
    else
      printf("%s\n", "Run this program with --terse_output to change the way "
             "it prints its output.");
  
    UnitTest& unit_test = *UnitTest::GetInstance();
  
    // If we are given the --terse_output command line flag, suppresses the
    // standard output and attaches own result printer.
    if (terse_output) {
      TestEventListeners& listeners = unit_test.listeners();
  
      // Removes the default console output listener from the list so it will
      // not receive events from Google Test and won't print any output. Since
      // this operation transfers ownership of the listener to the caller we
      // have to delete it as well.
      delete listeners.Release(listeners.default_result_printer());
  
      // Adds the custom output listener to the list. It will now receive
      // events from Google Test and print the alternative output. We don't
      // have to worry about deleting it since Google Test assumes ownership
      // over it after adding it to the list.
      listeners.Append(new TersePrinter);
    }
    int ret_val = RUN_ALL_TESTS();
  
    // This is an example of using the UnitTest reflection API to inspect test
    // results. Here we discount failures from the tests we expected to fail.
    int unexpectedly_failed_tests = 0;
    for (int i = 0; i < unit_test.total_test_case_count(); ++i) {
      const TestCase& test_case = *unit_test.GetTestCase(i);
      for (int j = 0; j < test_case.total_test_count(); ++j) {
        const TestInfo& test_info = *test_case.GetTestInfo(j);
        // Counts failed tests that were not meant to fail (those without
        // 'Fails' in the name).
        if (test_info.result()->Failed() &&
            strcmp(test_info.name(), "Fails") != 0) {
          unexpectedly_failed_tests++;
        }
      }
    }
  
    // Test that were meant to fail should not affect the test program outcome.
    if (unexpectedly_failed_tests == 0)
      ret_val = 0;
  
    return ret_val;
  }
  