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29 // This sample shows how to use Google Test listener API to implement
30 // an alternative console output and how to use the UnitTest reflection API
31 // to enumerate test suites and tests and to inspect their results.
35 #include "gtest/gtest.h"
37 using ::testing::EmptyTestEventListener;
38 using ::testing::InitGoogleTest;
39 using ::testing::Test;
40 using ::testing::TestEventListeners;
41 using ::testing::TestInfo;
42 using ::testing::TestPartResult;
43 using ::testing::TestSuite;
44 using ::testing::UnitTest;
46 // Provides alternative output mode which produces minimal amount of
47 // information about tests.
48 class TersePrinter : public EmptyTestEventListener {
50 // Called before any test activity starts.
51 void OnTestProgramStart(const UnitTest& /* unit_test */) override {}
53 // Called after all test activities have ended.
54 void OnTestProgramEnd(const UnitTest& unit_test) override {
55 fprintf(stdout, "TEST %s\n", unit_test.Passed() ? "PASSED" : "FAILED");
59 // Called before a test starts.
60 void OnTestStart(const TestInfo& test_info) override {
61 fprintf(stdout, "*** Test %s.%s starting.\n", test_info.test_suite_name(),
66 // Called after a failed assertion or a SUCCEED() invocation.
67 void OnTestPartResult(const TestPartResult& test_part_result) override {
68 fprintf(stdout, "%s in %s:%d\n%s\n",
69 test_part_result.failed() ? "*** Failure" : "Success",
70 test_part_result.file_name(), test_part_result.line_number(),
71 test_part_result.summary());
75 // Called after a test ends.
76 void OnTestEnd(const TestInfo& test_info) override {
77 fprintf(stdout, "*** Test %s.%s ending.\n", test_info.test_suite_name(),
81 }; // class TersePrinter
83 TEST(CustomOutputTest, PrintsMessage) {
84 printf("Printing something from the test body...\n");
87 TEST(CustomOutputTest, Succeeds) {
88 SUCCEED() << "SUCCEED() has been invoked from here";
91 TEST(CustomOutputTest, Fails) {
93 << "This test fails in order to demonstrate alternative failure messages";
97 int main(int argc, char** argv) {
98 InitGoogleTest(&argc, argv);
100 bool terse_output = false;
101 if (argc > 1 && strcmp(argv[1], "--terse_output") == 0)
105 "Run this program with --terse_output to change the way "
106 "it prints its output.");
108 UnitTest& unit_test = *UnitTest::GetInstance();
110 // If we are given the --terse_output command line flag, suppresses the
111 // standard output and attaches own result printer.
113 TestEventListeners& listeners = unit_test.listeners();
115 // Removes the default console output listener from the list so it will
116 // not receive events from Google Test and won't print any output. Since
117 // this operation transfers ownership of the listener to the caller we
118 // have to delete it as well.
119 delete listeners.Release(listeners.default_result_printer());
121 // Adds the custom output listener to the list. It will now receive
122 // events from Google Test and print the alternative output. We don't
123 // have to worry about deleting it since Google Test assumes ownership
124 // over it after adding it to the list.
125 listeners.Append(new TersePrinter);
127 int ret_val = RUN_ALL_TESTS();
129 // This is an example of using the UnitTest reflection API to inspect test
130 // results. Here we discount failures from the tests we expected to fail.
131 int unexpectedly_failed_tests = 0;
132 for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
133 const testing::TestSuite& test_suite = *unit_test.GetTestSuite(i);
134 for (int j = 0; j < test_suite.total_test_count(); ++j) {
135 const TestInfo& test_info = *test_suite.GetTestInfo(j);
136 // Counts failed tests that were not meant to fail (those without
137 // 'Fails' in the name).
138 if (test_info.result()->Failed() &&
139 strcmp(test_info.name(), "Fails") != 0) {
140 unexpectedly_failed_tests++;
145 // Test that were meant to fail should not affect the test program outcome.
146 if (unexpectedly_failed_tests == 0) ret_val = 0;