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				// 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
				// 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.


				// 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;
				}