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// Copyright 2007, Google Inc.
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// 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: wan@google.com (Zhanyong Wan)
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// Tests that SCOPED_TRACE() and various Google Test assertions can be
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// used in a large number of threads concurrently.
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#include "gtest/gtest.h"
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// We must define this macro in order to #include
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// gtest-internal-inl.h. This is how Google Test prevents a user from
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// accidentally depending on its internal implementation.
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#define GTEST_IMPLEMENTATION_ 1
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#include "src/gtest-internal-inl.h"
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#undef GTEST_IMPLEMENTATION_
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#if GTEST_IS_THREADSAFE
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using internal::Notification;
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using internal::TestPropertyKeyIs;
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using internal::ThreadWithParam;
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using internal::scoped_ptr;
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// In order to run tests in this file, for platforms where Google Test is
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// thread safe, implement ThreadWithParam. See the description of its API
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// in gtest-port.h, where it is defined for already supported platforms.
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// How many threads to create?
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const int kThreadCount = 50;
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std::string IdToKey(int id, const char* suffix) {
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key << "key_" << id << "_" << suffix;
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return key.GetString();
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std::string IdToString(int id) {
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return id_message.GetString();
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void ExpectKeyAndValueWereRecordedForId(
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const std::vector<TestProperty>& properties,
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int id, const char* suffix) {
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TestPropertyKeyIs matches_key(IdToKey(id, suffix).c_str());
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const std::vector<TestProperty>::const_iterator property =
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std::find_if(properties.begin(), properties.end(), matches_key);
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ASSERT_TRUE(property != properties.end())
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<< "expecting " << suffix << " value for id " << id;
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EXPECT_STREQ(IdToString(id).c_str(), property->value());
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// Calls a large number of Google Test assertions, where exactly one of them
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void ManyAsserts(int id) {
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GTEST_LOG_(INFO) << "Thread #" << id << " running...";
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SCOPED_TRACE(Message() << "Thread #" << id);
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for (int i = 0; i < kThreadCount; i++) {
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SCOPED_TRACE(Message() << "Iteration #" << i);
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// A bunch of assertions that should succeed.
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ASSERT_FALSE(false) << "This shouldn't fail.";
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EXPECT_STREQ("a", "a");
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EXPECT_EQ(i, i) << "This shouldn't fail.";
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// RecordProperty() should interact safely with other threads as well.
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// The shared_key forces property updates.
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Test::RecordProperty(IdToKey(id, "string").c_str(), IdToString(id).c_str());
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Test::RecordProperty(IdToKey(id, "int").c_str(), id);
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Test::RecordProperty("shared_key", IdToString(id).c_str());
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// This assertion should fail kThreadCount times per thread. It
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// is for testing whether Google Test can handle failed assertions in a
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// multi-threaded context.
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EXPECT_LT(i, 0) << "This should always fail.";
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void CheckTestFailureCount(int expected_failures) {
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const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
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const TestResult* const result = info->result();
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GTEST_CHECK_(expected_failures == result->total_part_count())
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<< "Logged " << result->total_part_count() << " failures "
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<< " vs. " << expected_failures << " expected";
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// Tests using SCOPED_TRACE() and Google Test assertions in many threads
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TEST(StressTest, CanUseScopedTraceAndAssertionsInManyThreads) {
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scoped_ptr<ThreadWithParam<int> > threads[kThreadCount];
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Notification threads_can_start;
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for (int i = 0; i != kThreadCount; i++)
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threads[i].reset(new ThreadWithParam<int>(&ManyAsserts,
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&threads_can_start));
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threads_can_start.Notify();
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// Blocks until all the threads are done.
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for (int i = 0; i != kThreadCount; i++)
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// Ensures that kThreadCount*kThreadCount failures have been reported.
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const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
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const TestResult* const result = info->result();
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std::vector<TestProperty> properties;
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// We have no access to the TestResult's list of properties but we can
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// copy them one by one.
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for (int i = 0; i < result->test_property_count(); ++i)
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properties.push_back(result->GetTestProperty(i));
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EXPECT_EQ(kThreadCount * 2 + 1, result->test_property_count())
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<< "String and int values recorded on each thread, "
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<< "as well as one shared_key";
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for (int i = 0; i < kThreadCount; ++i) {
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ExpectKeyAndValueWereRecordedForId(properties, i, "string");
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ExpectKeyAndValueWereRecordedForId(properties, i, "int");
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CheckTestFailureCount(kThreadCount*kThreadCount);
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void FailingThread(bool is_fatal) {
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FAIL() << "Fatal failure in some other thread. "
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<< "(This failure is expected.)";
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ADD_FAILURE() << "Non-fatal failure in some other thread. "
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<< "(This failure is expected.)";
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void GenerateFatalFailureInAnotherThread(bool is_fatal) {
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ThreadWithParam<bool> thread(&FailingThread, is_fatal, NULL);
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TEST(NoFatalFailureTest, ExpectNoFatalFailureIgnoresFailuresInOtherThreads) {
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EXPECT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
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// We should only have one failure (the one from
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// GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
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CheckTestFailureCount(1);
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void AssertNoFatalFailureIgnoresFailuresInOtherThreads() {
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ASSERT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
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TEST(NoFatalFailureTest, AssertNoFatalFailureIgnoresFailuresInOtherThreads) {
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// Using a subroutine, to make sure, that the test continues.
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AssertNoFatalFailureIgnoresFailuresInOtherThreads();
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// We should only have one failure (the one from
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// GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
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CheckTestFailureCount(1);
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TEST(FatalFailureTest, ExpectFatalFailureIgnoresFailuresInOtherThreads) {
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// This statement should fail, since the current thread doesn't generate a
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// fatal failure, only another one does.
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EXPECT_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true), "expected");
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CheckTestFailureCount(2);
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TEST(FatalFailureOnAllThreadsTest, ExpectFatalFailureOnAllThreads) {
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// This statement should succeed, because failures in all threads are
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EXPECT_FATAL_FAILURE_ON_ALL_THREADS(
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GenerateFatalFailureInAnotherThread(true), "expected");
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CheckTestFailureCount(0);
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// We need to add a failure, because main() checks that there are failures.
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// But when only this test is run, we shouldn't have any failures.
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ADD_FAILURE() << "This is an expected non-fatal failure.";
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TEST(NonFatalFailureTest, ExpectNonFatalFailureIgnoresFailuresInOtherThreads) {
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// This statement should fail, since the current thread doesn't generate a
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// fatal failure, only another one does.
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EXPECT_NONFATAL_FAILURE(GenerateFatalFailureInAnotherThread(false),
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CheckTestFailureCount(2);
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TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
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// This statement should succeed, because failures in all threads are
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EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
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GenerateFatalFailureInAnotherThread(false), "expected");
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CheckTestFailureCount(0);
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// We need to add a failure, because main() checks that there are failures,
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// But when only this test is run, we shouldn't have any failures.
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ADD_FAILURE() << "This is an expected non-fatal failure.";
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} // namespace testing
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int main(int argc, char **argv) {
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testing::InitGoogleTest(&argc, argv);
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const int result = RUN_ALL_TESTS(); // Expected to fail.
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GTEST_CHECK_(result == 1) << "RUN_ALL_TESTS() did not fail as expected";
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DISABLED_ThreadSafetyTestsAreSkippedWhenGoogleTestIsNotThreadSafe) {
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int main(int argc, char **argv) {
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testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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#endif // GTEST_IS_THREADSAFE
added
removed
3rd_party/gmock/gtest/test/gtest_stress_test.cc
