gtest_stress_test.cc

// Copyright 2007, 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.
//
// Author: wan@google.com (Zhanyong Wan)

// Tests that SCOPED_TRACE() and various Google Test assertions can be
// used in a large number of threads concurrently.

#include "gtest/gtest.h"

#include <iostream>
#include <vector>

// We must define this macro in order to #include
// gtest-internal-inl.h.  This is how Google Test prevents a user from
// accidentally depending on its internal implementation.
#define GTEST_IMPLEMENTATION_ 1
#include "src/gtest-internal-inl.h"
#undef GTEST_IMPLEMENTATION_

#if GTEST_IS_THREADSAFE

namespace testing {
namespace {

using internal::Notification;
using internal::TestPropertyKeyIs;
using internal::ThreadWithParam;
using internal::scoped_ptr;

// In order to run tests in this file, for platforms where Google Test is
// thread safe, implement ThreadWithParam. See the description of its API
// in gtest-port.h, where it is defined for already supported platforms.

// How many threads to create?
const int kThreadCount = 50;

std::string IdToKey(int id, const char* suffix) {
  Message key;
  key << "key_" << id << "_" << suffix;
  return key.GetString();
}

std::string IdToString(int id) {
  Message id_message;
  id_message << id;
  return id_message.GetString();
}

void ExpectKeyAndValueWereRecordedForId(
    const std::vector<TestProperty>& properties,
    int id, const char* suffix) {
  TestPropertyKeyIs matches_key(IdToKey(id, suffix).c_str());
  const std::vector<TestProperty>::const_iterator property =
      std::find_if(properties.begin(), properties.end(), matches_key);
  ASSERT_TRUE(property != properties.end())
      << "expecting " << suffix << " value for id " << id;
  EXPECT_STREQ(IdToString(id).c_str(), property->value());
}

// Calls a large number of Google Test assertions, where exactly one of them
// will fail.
void ManyAsserts(int id) {
  GTEST_LOG_(INFO) << "Thread #" << id << " running...";

  SCOPED_TRACE(Message() << "Thread #" << id);

  for (int i = 0; i < kThreadCount; i++) {
    SCOPED_TRACE(Message() << "Iteration #" << i);

    // A bunch of assertions that should succeed.
    EXPECT_TRUE(true);
    ASSERT_FALSE(false) << "This shouldn't fail.";
    EXPECT_STREQ("a", "a");
    ASSERT_LE(5, 6);
    EXPECT_EQ(i, i) << "This shouldn't fail.";

    // RecordProperty() should interact safely with other threads as well.
    // The shared_key forces property updates.
    Test::RecordProperty(IdToKey(id, "string").c_str(), IdToString(id).c_str());
    Test::RecordProperty(IdToKey(id, "int").c_str(), id);
    Test::RecordProperty("shared_key", IdToString(id).c_str());

    // This assertion should fail kThreadCount times per thread.  It
    // is for testing whether Google Test can handle failed assertions in a
    // multi-threaded context.
    EXPECT_LT(i, 0) << "This should always fail.";
  }
}

void CheckTestFailureCount(int expected_failures) {
  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
  const TestResult* const result = info->result();
  GTEST_CHECK_(expected_failures == result->total_part_count())
      << "Logged " << result->total_part_count() << " failures "
      << " vs. " << expected_failures << " expected";
}

// Tests using SCOPED_TRACE() and Google Test assertions in many threads
// concurrently.
TEST(StressTest, CanUseScopedTraceAndAssertionsInManyThreads) {
  {
    scoped_ptr<ThreadWithParam<int> > threads[kThreadCount];
    Notification threads_can_start;
    for (int i = 0; i != kThreadCount; i++)
      threads[i].reset(new ThreadWithParam<int>(&ManyAsserts,
                                                i,
                                                &threads_can_start));

    threads_can_start.Notify();

    // Blocks until all the threads are done.
    for (int i = 0; i != kThreadCount; i++)
      threads[i]->Join();
  }

  // Ensures that kThreadCount*kThreadCount failures have been reported.
  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
  const TestResult* const result = info->result();

  std::vector<TestProperty> properties;
  // We have no access to the TestResult's list of properties but we can
  // copy them one by one.
  for (int i = 0; i < result->test_property_count(); ++i)
    properties.push_back(result->GetTestProperty(i));

  EXPECT_EQ(kThreadCount * 2 + 1, result->test_property_count())
      << "String and int values recorded on each thread, "
      << "as well as one shared_key";
  for (int i = 0; i < kThreadCount; ++i) {
    ExpectKeyAndValueWereRecordedForId(properties, i, "string");
    ExpectKeyAndValueWereRecordedForId(properties, i, "int");
  }
  CheckTestFailureCount(kThreadCount*kThreadCount);
}

void FailingThread(bool is_fatal) {
  if (is_fatal)
    FAIL() << "Fatal failure in some other thread. "
           << "(This failure is expected.)";
  else
    ADD_FAILURE() << "Non-fatal failure in some other thread. "
                  << "(This failure is expected.)";
}

void GenerateFatalFailureInAnotherThread(bool is_fatal) {
  ThreadWithParam<bool> thread(&FailingThread, is_fatal, NULL);
  thread.Join();
}

TEST(NoFatalFailureTest, ExpectNoFatalFailureIgnoresFailuresInOtherThreads) {
  EXPECT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
  // We should only have one failure (the one from
  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
  // should succeed.
  CheckTestFailureCount(1);
}

void AssertNoFatalFailureIgnoresFailuresInOtherThreads() {
  ASSERT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
}
TEST(NoFatalFailureTest, AssertNoFatalFailureIgnoresFailuresInOtherThreads) {
  // Using a subroutine, to make sure, that the test continues.
  AssertNoFatalFailureIgnoresFailuresInOtherThreads();
  // We should only have one failure (the one from
  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
  // should succeed.
  CheckTestFailureCount(1);
}

TEST(FatalFailureTest, ExpectFatalFailureIgnoresFailuresInOtherThreads) {
  // This statement should fail, since the current thread doesn't generate a
  // fatal failure, only another one does.
  EXPECT_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true), "expected");
  CheckTestFailureCount(2);
}

TEST(FatalFailureOnAllThreadsTest, ExpectFatalFailureOnAllThreads) {
  // This statement should succeed, because failures in all threads are
  // considered.
  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(
      GenerateFatalFailureInAnotherThread(true), "expected");
  CheckTestFailureCount(0);
  // We need to add a failure, because main() checks that there are failures.
  // But when only this test is run, we shouldn't have any failures.
  ADD_FAILURE() << "This is an expected non-fatal failure.";
}

TEST(NonFatalFailureTest, ExpectNonFatalFailureIgnoresFailuresInOtherThreads) {
  // This statement should fail, since the current thread doesn't generate a
  // fatal failure, only another one does.
  EXPECT_NONFATAL_FAILURE(GenerateFatalFailureInAnotherThread(false),
                          "expected");
  CheckTestFailureCount(2);
}

TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
  // This statement should succeed, because failures in all threads are
  // considered.
  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
      GenerateFatalFailureInAnotherThread(false), "expected");
  CheckTestFailureCount(0);
  // We need to add a failure, because main() checks that there are failures,
  // But when only this test is run, we shouldn't have any failures.
  ADD_FAILURE() << "This is an expected non-fatal failure.";
}

}  // namespace
}  // namespace testing

int main(int argc, char **argv) {
  testing::InitGoogleTest(&argc, argv);

  const int result = RUN_ALL_TESTS();  // Expected to fail.
  GTEST_CHECK_(result == 1) << "RUN_ALL_TESTS() did not fail as expected";

  printf("\nPASS\n");
  return 0;
}

#else
TEST(StressTest,
     DISABLED_ThreadSafetyTestsAreSkippedWhenGoogleTestIsNotThreadSafe) {
}

int main(int argc, char **argv) {
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}
#endif  // GTEST_IS_THREADSAFE
	// Copyright 2007, 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.
	//
	// Author: wan@google.com (Zhanyong Wan)

	// Tests that SCOPED_TRACE() and various Google Test assertions can be
	// used in a large number of threads concurrently.

	#include "gtest/gtest.h"

	#include <iostream>
	#include <vector>

	// We must define this macro in order to #include
	// gtest-internal-inl.h. This is how Google Test prevents a user from
	// accidentally depending on its internal implementation.
	#define GTEST_IMPLEMENTATION_ 1
	#include "src/gtest-internal-inl.h"
	#undef GTEST_IMPLEMENTATION_

	#if GTEST_IS_THREADSAFE

	namespace testing {
	namespace {

	using internal::Notification;
	using internal::TestPropertyKeyIs;
	using internal::ThreadWithParam;
	using internal::scoped_ptr;

	// In order to run tests in this file, for platforms where Google Test is
	// thread safe, implement ThreadWithParam. See the description of its API
	// in gtest-port.h, where it is defined for already supported platforms.

	// How many threads to create?
	const int kThreadCount = 50;

	std::string IdToKey(int id, const char* suffix) {
	Message key;
	key << "key_" << id << "_" << suffix;
	return key.GetString();
	}

	std::string IdToString(int id) {
	Message id_message;
	id_message << id;
	return id_message.GetString();
	}

	void ExpectKeyAndValueWereRecordedForId(
	const std::vector<TestProperty>& properties,
	int id, const char* suffix) {
	TestPropertyKeyIs matches_key(IdToKey(id, suffix).c_str());
	const std::vector<TestProperty>::const_iterator property =
	std::find_if(properties.begin(), properties.end(), matches_key);
	ASSERT_TRUE(property != properties.end())
	<< "expecting " << suffix << " value for id " << id;
	EXPECT_STREQ(IdToString(id).c_str(), property->value());
	}

	// Calls a large number of Google Test assertions, where exactly one of them
	// will fail.
	void ManyAsserts(int id) {
	GTEST_LOG_(INFO) << "Thread #" << id << " running...";

	SCOPED_TRACE(Message() << "Thread #" << id);

	for (int i = 0; i < kThreadCount; i++) {
	SCOPED_TRACE(Message() << "Iteration #" << i);

	// A bunch of assertions that should succeed.
	EXPECT_TRUE(true);
	ASSERT_FALSE(false) << "This shouldn't fail.";
	EXPECT_STREQ("a", "a");
	ASSERT_LE(5, 6);
	EXPECT_EQ(i, i) << "This shouldn't fail.";

	// RecordProperty() should interact safely with other threads as well.
	// The shared_key forces property updates.
	Test::RecordProperty(IdToKey(id, "string").c_str(), IdToString(id).c_str());
	Test::RecordProperty(IdToKey(id, "int").c_str(), id);
	Test::RecordProperty("shared_key", IdToString(id).c_str());

	// This assertion should fail kThreadCount times per thread. It
	// is for testing whether Google Test can handle failed assertions in a
	// multi-threaded context.
	EXPECT_LT(i, 0) << "This should always fail.";
	}
	}

	void CheckTestFailureCount(int expected_failures) {
	const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
	const TestResult* const result = info->result();
	GTEST_CHECK_(expected_failures == result->total_part_count())
	<< "Logged " << result->total_part_count() << " failures "
	<< " vs. " << expected_failures << " expected";
	}

	// Tests using SCOPED_TRACE() and Google Test assertions in many threads
	// concurrently.
	TEST(StressTest, CanUseScopedTraceAndAssertionsInManyThreads) {
	{
	scoped_ptr<ThreadWithParam<int> > threads[kThreadCount];
	Notification threads_can_start;
	for (int i = 0; i != kThreadCount; i++)
	threads[i].reset(new ThreadWithParam<int>(&ManyAsserts,
	i,
	&threads_can_start));

	threads_can_start.Notify();

	// Blocks until all the threads are done.
	for (int i = 0; i != kThreadCount; i++)
	threads[i]->Join();
	}

	// Ensures that kThreadCount*kThreadCount failures have been reported.
	const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
	const TestResult* const result = info->result();

	std::vector<TestProperty> properties;
	// We have no access to the TestResult's list of properties but we can
	// copy them one by one.
	for (int i = 0; i < result->test_property_count(); ++i)
	properties.push_back(result->GetTestProperty(i));

	EXPECT_EQ(kThreadCount * 2 + 1, result->test_property_count())
	<< "String and int values recorded on each thread, "
	<< "as well as one shared_key";
	for (int i = 0; i < kThreadCount; ++i) {
	ExpectKeyAndValueWereRecordedForId(properties, i, "string");
	ExpectKeyAndValueWereRecordedForId(properties, i, "int");
	}
	CheckTestFailureCount(kThreadCount*kThreadCount);
	}

	void FailingThread(bool is_fatal) {
	if (is_fatal)
	FAIL() << "Fatal failure in some other thread. "
	<< "(This failure is expected.)";
	else
	ADD_FAILURE() << "Non-fatal failure in some other thread. "
	<< "(This failure is expected.)";
	}

	void GenerateFatalFailureInAnotherThread(bool is_fatal) {
	ThreadWithParam<bool> thread(&FailingThread, is_fatal, NULL);
	thread.Join();
	}

	TEST(NoFatalFailureTest, ExpectNoFatalFailureIgnoresFailuresInOtherThreads) {
	EXPECT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
	// We should only have one failure (the one from
	// GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
	// should succeed.
	CheckTestFailureCount(1);
	}

	void AssertNoFatalFailureIgnoresFailuresInOtherThreads() {
	ASSERT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
	}
	TEST(NoFatalFailureTest, AssertNoFatalFailureIgnoresFailuresInOtherThreads) {
	// Using a subroutine, to make sure, that the test continues.
	AssertNoFatalFailureIgnoresFailuresInOtherThreads();
	// We should only have one failure (the one from
	// GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
	// should succeed.
	CheckTestFailureCount(1);
	}

	TEST(FatalFailureTest, ExpectFatalFailureIgnoresFailuresInOtherThreads) {
	// This statement should fail, since the current thread doesn't generate a
	// fatal failure, only another one does.
	EXPECT_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true), "expected");
	CheckTestFailureCount(2);
	}

	TEST(FatalFailureOnAllThreadsTest, ExpectFatalFailureOnAllThreads) {
	// This statement should succeed, because failures in all threads are
	// considered.
	EXPECT_FATAL_FAILURE_ON_ALL_THREADS(
	GenerateFatalFailureInAnotherThread(true), "expected");
	CheckTestFailureCount(0);
	// We need to add a failure, because main() checks that there are failures.
	// But when only this test is run, we shouldn't have any failures.
	ADD_FAILURE() << "This is an expected non-fatal failure.";
	}

	TEST(NonFatalFailureTest, ExpectNonFatalFailureIgnoresFailuresInOtherThreads) {
	// This statement should fail, since the current thread doesn't generate a
	// fatal failure, only another one does.
	EXPECT_NONFATAL_FAILURE(GenerateFatalFailureInAnotherThread(false),
	"expected");
	CheckTestFailureCount(2);
	}

	TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
	// This statement should succeed, because failures in all threads are
	// considered.
	EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
	GenerateFatalFailureInAnotherThread(false), "expected");
	CheckTestFailureCount(0);
	// We need to add a failure, because main() checks that there are failures,
	// But when only this test is run, we shouldn't have any failures.
	ADD_FAILURE() << "This is an expected non-fatal failure.";
	}

	} // namespace
	} // namespace testing

	int main(int argc, char **argv) {
	testing::InitGoogleTest(&argc, argv);

	const int result = RUN_ALL_TESTS(); // Expected to fail.
	GTEST_CHECK_(result == 1) << "RUN_ALL_TESTS() did not fail as expected";

	printf("\nPASS\n");
	return 0;
	}

	#else
	TEST(StressTest,
	DISABLED_ThreadSafetyTestsAreSkippedWhenGoogleTestIsNotThreadSafe) {
	}

	int main(int argc, char **argv) {
	testing::InitGoogleTest(&argc, argv);
	return RUN_ALL_TESTS();
	}
	#endif // GTEST_IS_THREADSAFE