1 // Copyright 2009 Google Inc. All Rights Reserved. 2 // 3 // Redistribution and use in source and binary forms, with or without 4 // modification, are permitted provided that the following conditions are 5 // met: 6 // 7 // * Redistributions of source code must retain the above copyright 8 // notice, this list of conditions and the following disclaimer. 9 // * Redistributions in binary form must reproduce the above 10 // copyright notice, this list of conditions and the following disclaimer 11 // in the documentation and/or other materials provided with the 12 // distribution. 13 // * Neither the name of Google Inc. nor the names of its 14 // contributors may be used to endorse or promote products derived from 15 // this software without specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 // 29 // Author: vladl (at) google.com (Vlad Losev) 30 31 // This sample shows how to use Google Test listener API to implement 32 // an alternative console output and how to use the UnitTest reflection API 33 // to enumerate test cases and tests and to inspect their results. 34 35 #include <stdio.h> 36 37 #include <gtest/gtest.h> 38 39 using ::testing::EmptyTestEventListener; 40 using ::testing::InitGoogleTest; 41 using ::testing::Test; 42 using ::testing::TestCase; 43 using ::testing::TestEventListeners; 44 using ::testing::TestInfo; 45 using ::testing::TestPartResult; 46 using ::testing::UnitTest; 47 48 namespace { 49 50 // Provides alternative output mode which produces minimal amount of 51 // information about tests. 52 class TersePrinter : public EmptyTestEventListener { 53 private: 54 // Called before any test activity starts. 55 virtual void OnTestProgramStart(const UnitTest& unit_test) {} 56 57 // Called after all test activities have ended. 58 virtual void OnTestProgramEnd(const UnitTest& unit_test) { 59 fprintf(stdout, "TEST %s\n", unit_test.Passed() ? "PASSED" : "FAILED"); 60 fflush(stdout); 61 } 62 63 // Called before a test starts. 64 virtual void OnTestStart(const TestInfo& test_info) { 65 fprintf(stdout, 66 "*** Test %s.%s starting.\n", 67 test_info.test_case_name(), 68 test_info.name()); 69 fflush(stdout); 70 } 71 72 // Called after a failed assertion or a SUCCESS(). 73 virtual void OnTestPartResult(const TestPartResult& test_part_result) { 74 fprintf(stdout, 75 "%s in %s:%d\n%s\n", 76 test_part_result.failed() ? "*** Failure" : "Success", 77 test_part_result.file_name(), 78 test_part_result.line_number(), 79 test_part_result.summary()); 80 fflush(stdout); 81 } 82 83 // Called after a test ends. 84 virtual void OnTestEnd(const TestInfo& test_info) { 85 fprintf(stdout, 86 "*** Test %s.%s ending.\n", 87 test_info.test_case_name(), 88 test_info.name()); 89 fflush(stdout); 90 } 91 }; // class TersePrinter 92 93 TEST(CustomOutputTest, PrintsMessage) { 94 printf("Printing something from the test body...\n"); 95 } 96 97 TEST(CustomOutputTest, Succeeds) { 98 SUCCEED() << "SUCCEED() has been invoked from here"; 99 } 100 101 TEST(CustomOutputTest, Fails) { 102 EXPECT_EQ(1, 2) 103 << "This test fails in order to demonstrate alternative failure messages"; 104 } 105 106 } // namespace 107 108 int main(int argc, char **argv) { 109 InitGoogleTest(&argc, argv); 110 111 bool terse_output = false; 112 if (argc > 1 && strcmp(argv[1], "--terse_output") == 0 ) 113 terse_output = true; 114 else 115 printf("%s\n", "Run this program with --terse_output to change the way " 116 "it prints its output."); 117 118 UnitTest& unit_test = *UnitTest::GetInstance(); 119 120 // If we are given the --terse_output command line flag, suppresses the 121 // standard output and attaches own result printer. 122 if (terse_output) { 123 TestEventListeners& listeners = unit_test.listeners(); 124 125 // Removes the default console output listener from the list so it will 126 // not receive events from Google Test and won't print any output. Since 127 // this operation transfers ownership of the listener to the caller we 128 // have to delete it as well. 129 delete listeners.Release(listeners.default_result_printer()); 130 131 // Adds the custom output listener to the list. It will now receive 132 // events from Google Test and print the alternative output. We don't 133 // have to worry about deleting it since Google Test assumes ownership 134 // over it after adding it to the list. 135 listeners.Append(new TersePrinter); 136 } 137 int ret_val = RUN_ALL_TESTS(); 138 139 // This is an example of using the UnitTest reflection API to inspect test 140 // results. Here we discount failures from the tests we expected to fail. 141 int unexpectedly_failed_tests = 0; 142 for (int i = 0; i < unit_test.total_test_case_count(); ++i) { 143 const TestCase& test_case = *unit_test.GetTestCase(i); 144 for (int j = 0; j < test_case.total_test_count(); ++j) { 145 const TestInfo& test_info = *test_case.GetTestInfo(j); 146 // Counts failed tests that were not meant to fail (those without 147 // 'Fails' in the name). 148 if (test_info.result()->Failed() && 149 strcmp(test_info.name(), "Fails") != 0) { 150 unexpectedly_failed_tests++; 151 } 152 } 153 } 154 155 // Test that were meant to fail should not affect the test program outcome. 156 if (unexpectedly_failed_tests == 0) 157 ret_val = 0; 158 159 return ret_val; 160 } 161
