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