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// Copyright 2005, 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 for death tests.
#include "gtest/gtest-death-test.h"
#include "gtest/gtest.h"
#include "gtest/internal/gtest-filepath.h"
using testing::internal::AlwaysFalse;
using testing::internal::AlwaysTrue;
#if GTEST_HAS_DEATH_TEST
# if GTEST_OS_WINDOWS
# include <direct.h> // For chdir().
# else
# include <unistd.h>
# include <sys/wait.h> // For waitpid.
# endif // GTEST_OS_WINDOWS
# include <limits.h>
# include <signal.h>
# include <stdio.h>
# if GTEST_OS_LINUX
# include <sys/time.h>
# endif // GTEST_OS_LINUX
# include "gtest/gtest-spi.h"
// Indicates that this translation unit is part of Google Test's
// implementation. It must come before gtest-internal-inl.h is
// included, or there will be a compiler error. This trick is to
// prevent a user from accidentally including gtest-internal-inl.h in
// his code.
# define GTEST_IMPLEMENTATION_ 1
# include "src/gtest-internal-inl.h"
# undef GTEST_IMPLEMENTATION_
namespace posix = ::testing::internal::posix;
using testing::Message;
using testing::internal::DeathTest;
using testing::internal::DeathTestFactory;
using testing::internal::FilePath;
using testing::internal::GetLastErrnoDescription;
using testing::internal::GetUnitTestImpl;
using testing::internal::InDeathTestChild;
using testing::internal::ParseNaturalNumber;
namespace testing {
namespace internal {
// A helper class whose objects replace the death test factory for a
// single UnitTest object during their lifetimes.
class ReplaceDeathTestFactory {
public:
explicit ReplaceDeathTestFactory(DeathTestFactory* new_factory)
: unit_test_impl_(GetUnitTestImpl()) {
old_factory_ = unit_test_impl_->death_test_factory_.release();
unit_test_impl_->death_test_factory_.reset(new_factory);
}
~ReplaceDeathTestFactory() {
unit_test_impl_->death_test_factory_.release();
unit_test_impl_->death_test_factory_.reset(old_factory_);
}
private:
// Prevents copying ReplaceDeathTestFactory objects.
ReplaceDeathTestFactory(const ReplaceDeathTestFactory&);
void operator=(const ReplaceDeathTestFactory&);
UnitTestImpl* unit_test_impl_;
DeathTestFactory* old_factory_;
};
} // namespace internal
} // namespace testing
void DieWithMessage(const ::std::string& message) {
fprintf(stderr, "%s", message.c_str());
fflush(stderr); // Make sure the text is printed before the process exits.
// We call _exit() instead of exit(), as the former is a direct
// system call and thus safer in the presence of threads. exit()
// will invoke user-defined exit-hooks, which may do dangerous
// things that conflict with death tests.
//
// Some compilers can recognize that _exit() never returns and issue the
// 'unreachable code' warning for code following this function, unless
// fooled by a fake condition.
if (AlwaysTrue())
_exit(1);
}
void DieInside(const ::std::string& function) {
DieWithMessage("death inside " + function + "().");
}
// Tests that death tests work.
class TestForDeathTest : public testing::Test {
protected:
TestForDeathTest() : original_dir_(FilePath::GetCurrentDir()) {}
virtual ~TestForDeathTest() {
posix::ChDir(original_dir_.c_str());
}
// A static member function that's expected to die.
static void StaticMemberFunction() { DieInside("StaticMemberFunction"); }
// A method of the test fixture that may die.
void MemberFunction() {
if (should_die_)
DieInside("MemberFunction");
}
// True iff MemberFunction() should die.
bool should_die_;
const FilePath original_dir_;
};
// A class with a member function that may die.
class MayDie {
public:
explicit MayDie(bool should_die) : should_die_(should_die) {}
// A member function that may die.
void MemberFunction() const {
if (should_die_)
DieInside("MayDie::MemberFunction");
}
private:
// True iff MemberFunction() should die.
bool should_die_;
};
// A global function that's expected to die.
void GlobalFunction() { DieInside("GlobalFunction"); }
// A non-void function that's expected to die.
int NonVoidFunction() {
DieInside("NonVoidFunction");
return 1;
}
// A unary function that may die.
void DieIf(bool should_die) {
if (should_die)
DieInside("DieIf");
}
// A binary function that may die.
bool DieIfLessThan(int x, int y) {
if (x < y) {
DieInside("DieIfLessThan");
}
return true;
}
// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
void DeathTestSubroutine() {
EXPECT_DEATH(GlobalFunction(), "death.*GlobalFunction");
ASSERT_DEATH(GlobalFunction(), "death.*GlobalFunction");
}
// Death in dbg, not opt.
int DieInDebugElse12(int* sideeffect) {
if (sideeffect) *sideeffect = 12;
# ifndef NDEBUG
DieInside("DieInDebugElse12");
# endif // NDEBUG
return 12;
}
# if GTEST_OS_WINDOWS
// Tests the ExitedWithCode predicate.
TEST(ExitStatusPredicateTest, ExitedWithCode) {
// On Windows, the process's exit code is the same as its exit status,
// so the predicate just compares the its input with its parameter.
EXPECT_TRUE(testing::ExitedWithCode(0)(0));
EXPECT_TRUE(testing::ExitedWithCode(1)(1));
EXPECT_TRUE(testing::ExitedWithCode(42)(42));
EXPECT_FALSE(testing::ExitedWithCode(0)(1));
EXPECT_FALSE(testing::ExitedWithCode(1)(0));
}
# else
// Returns the exit status of a process that calls _exit(2) with a
// given exit code. This is a helper function for the
// ExitStatusPredicateTest test suite.
static int NormalExitStatus(int exit_code) {
pid_t child_pid = fork();
if (child_pid == 0) {
_exit(exit_code);
}
int status;
waitpid(child_pid, &status, 0);
return status;
}
// Returns the exit status of a process that raises a given signal.
// If the signal does not cause the process to die, then it returns
// instead the exit status of a process that exits normally with exit
// code 1. This is a helper function for the ExitStatusPredicateTest
// test suite.
static int KilledExitStatus(int signum) {
pid_t child_pid = fork();
if (child_pid == 0) {
raise(signum);
_exit(1);
}
int status;
waitpid(child_pid, &status, 0);
return status;
}
// Tests the ExitedWithCode predicate.
TEST(ExitStatusPredicateTest, ExitedWithCode) {
const int status0 = NormalExitStatus(0);
const int status1 = NormalExitStatus(1);
const int status42 = NormalExitStatus(42);
const testing::ExitedWithCode pred0(0);
const testing::ExitedWithCode pred1(1);
const testing::ExitedWithCode pred42(42);
EXPECT_PRED1(pred0, status0);
EXPECT_PRED1(pred1, status1);
EXPECT_PRED1(pred42, status42);
EXPECT_FALSE(pred0(status1));
EXPECT_FALSE(pred42(status0));
EXPECT_FALSE(pred1(status42));
}
// Tests the KilledBySignal predicate.
TEST(ExitStatusPredicateTest, KilledBySignal) {
const int status_segv = KilledExitStatus(SIGSEGV);
const int status_kill = KilledExitStatus(SIGKILL);
const testing::KilledBySignal pred_segv(SIGSEGV);
const testing::KilledBySignal pred_kill(SIGKILL);
EXPECT_PRED1(pred_segv, status_segv);
EXPECT_PRED1(pred_kill, status_kill);
EXPECT_FALSE(pred_segv(status_kill));
EXPECT_FALSE(pred_kill(status_segv));
}
# endif // GTEST_OS_WINDOWS
// Tests that the death test macros expand to code which may or may not
// be followed by operator<<, and that in either case the complete text
// comprises only a single C++ statement.
TEST_F(TestForDeathTest, SingleStatement) {
if (AlwaysFalse())
// This would fail if executed; this is a compilation test only
ASSERT_DEATH(return, "");
if (AlwaysTrue())
EXPECT_DEATH(_exit(1), "");
else
// This empty "else" branch is meant to ensure that EXPECT_DEATH
// doesn't expand into an "if" statement without an "else"
;
if (AlwaysFalse())
ASSERT_DEATH(return, "") << "did not die";
if (AlwaysFalse())
;
else
EXPECT_DEATH(_exit(1), "") << 1 << 2 << 3;
}
void DieWithEmbeddedNul() {
fprintf(stderr, "Hello%cmy null world.\n", '\0');
fflush(stderr);
_exit(1);
}
# if GTEST_USES_PCRE
// Tests that EXPECT_DEATH and ASSERT_DEATH work when the error
// message has a NUL character in it.
TEST_F(TestForDeathTest, EmbeddedNulInMessage) {
// TODO(wan@google.com): <regex.h> doesn't support matching strings
// with embedded NUL characters - find a way to workaround it.
EXPECT_DEATH(DieWithEmbeddedNul(), "my null world");
ASSERT_DEATH(DieWithEmbeddedNul(), "my null world");
}
# endif // GTEST_USES_PCRE
// Tests that death test macros expand to code which interacts well with switch
// statements.
TEST_F(TestForDeathTest, SwitchStatement) {
// Microsoft compiler usually complains about switch statements without
// case labels. We suppress that warning for this test.
# ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable: 4065)
# endif // _MSC_VER
switch (0)
default:
ASSERT_DEATH(_exit(1), "") << "exit in default switch handler";
switch (0)
case 0:
EXPECT_DEATH(_exit(1), "") << "exit in switch case";
# ifdef _MSC_VER
# pragma warning(pop)
# endif // _MSC_VER
}
// Tests that a static member function can be used in a "fast" style
// death test.
TEST_F(TestForDeathTest, StaticMemberFunctionFastStyle) {
testing::GTEST_FLAG(death_test_style) = "fast";
ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
}
// Tests that a method of the test fixture can be used in a "fast"
// style death test.
TEST_F(TestForDeathTest, MemberFunctionFastStyle) {
testing::GTEST_FLAG(death_test_style) = "fast";
should_die_ = true;
EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
}
void ChangeToRootDir() { posix::ChDir(GTEST_PATH_SEP_); }
// Tests that death tests work even if the current directory has been
// changed.
TEST_F(TestForDeathTest, FastDeathTestInChangedDir) {
testing::GTEST_FLAG(death_test_style) = "fast";
ChangeToRootDir();
EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
ChangeToRootDir();
ASSERT_DEATH(_exit(1), "");
}
# if GTEST_OS_LINUX
void SigprofAction(int, siginfo_t*, void*) { /* no op */ }
// Sets SIGPROF action and ITIMER_PROF timer (interval: 1ms).
void SetSigprofActionAndTimer() {
struct itimerval timer;
timer.it_interval.tv_sec = 0;
timer.it_interval.tv_usec = 1;
timer.it_value = timer.it_interval;
ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, NULL));
struct sigaction signal_action;
memset(&signal_action, 0, sizeof(signal_action));
sigemptyset(&signal_action.sa_mask);
signal_action.sa_sigaction = SigprofAction;
signal_action.sa_flags = SA_RESTART | SA_SIGINFO;
ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, NULL));
}
// Disables ITIMER_PROF timer and ignores SIGPROF signal.
void DisableSigprofActionAndTimer(struct sigaction* old_signal_action) {
struct itimerval timer;
timer.it_interval.tv_sec = 0;
timer.it_interval.tv_usec = 0;
timer.it_value = timer.it_interval;
ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, NULL));
struct sigaction signal_action;
memset(&signal_action, 0, sizeof(signal_action));
sigemptyset(&signal_action.sa_mask);
signal_action.sa_handler = SIG_IGN;
ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, old_signal_action));
}
// Tests that death tests work when SIGPROF handler and timer are set.
TEST_F(TestForDeathTest, FastSigprofActionSet) {
testing::GTEST_FLAG(death_test_style) = "fast";
SetSigprofActionAndTimer();
EXPECT_DEATH(_exit(1), "");
struct sigaction old_signal_action;
DisableSigprofActionAndTimer(&old_signal_action);
EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
}
TEST_F(TestForDeathTest, ThreadSafeSigprofActionSet) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
SetSigprofActionAndTimer();
EXPECT_DEATH(_exit(1), "");
struct sigaction old_signal_action;
DisableSigprofActionAndTimer(&old_signal_action);
EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
}
# endif // GTEST_OS_LINUX
// Repeats a representative sample of death tests in the "threadsafe" style:
TEST_F(TestForDeathTest, StaticMemberFunctionThreadsafeStyle) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
}
TEST_F(TestForDeathTest, MemberFunctionThreadsafeStyle) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
should_die_ = true;
EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
}
TEST_F(TestForDeathTest, ThreadsafeDeathTestInLoop) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
for (int i = 0; i < 3; ++i)
EXPECT_EXIT(_exit(i), testing::ExitedWithCode(i), "") << ": i = " << i;
}
TEST_F(TestForDeathTest, ThreadsafeDeathTestInChangedDir) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
ChangeToRootDir();
EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
ChangeToRootDir();
ASSERT_DEATH(_exit(1), "");
}
TEST_F(TestForDeathTest, MixedStyles) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
EXPECT_DEATH(_exit(1), "");
testing::GTEST_FLAG(death_test_style) = "fast";
EXPECT_DEATH(_exit(1), "");
}
# if GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
namespace {
bool pthread_flag;
void SetPthreadFlag() {
pthread_flag = true;
}
} // namespace
TEST_F(TestForDeathTest, DoesNotExecuteAtforkHooks) {
if (!testing::GTEST_FLAG(death_test_use_fork)) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
pthread_flag = false;
ASSERT_EQ(0, pthread_atfork(&SetPthreadFlag, NULL, NULL));
ASSERT_DEATH(_exit(1), "");
ASSERT_FALSE(pthread_flag);
}
}
# endif // GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
// Tests that a method of another class can be used in a death test.
TEST_F(TestForDeathTest, MethodOfAnotherClass) {
const MayDie x(true);
ASSERT_DEATH(x.MemberFunction(), "MayDie\\:\\:MemberFunction");
}
// Tests that a global function can be used in a death test.
TEST_F(TestForDeathTest, GlobalFunction) {
EXPECT_DEATH(GlobalFunction(), "GlobalFunction");
}
// Tests that any value convertible to an RE works as a second
// argument to EXPECT_DEATH.
TEST_F(TestForDeathTest, AcceptsAnythingConvertibleToRE) {
static const char regex_c_str[] = "GlobalFunction";
EXPECT_DEATH(GlobalFunction(), regex_c_str);
const testing::internal::RE regex(regex_c_str);
EXPECT_DEATH(GlobalFunction(), regex);
# if GTEST_HAS_GLOBAL_STRING
const string regex_str(regex_c_str);
EXPECT_DEATH(GlobalFunction(), regex_str);
# endif // GTEST_HAS_GLOBAL_STRING
const ::std::string regex_std_str(regex_c_str);
EXPECT_DEATH(GlobalFunction(), regex_std_str);
}
// Tests that a non-void function can be used in a death test.
TEST_F(TestForDeathTest, NonVoidFunction) {
ASSERT_DEATH(NonVoidFunction(), "NonVoidFunction");
}
// Tests that functions that take parameter(s) can be used in a death test.
TEST_F(TestForDeathTest, FunctionWithParameter) {
EXPECT_DEATH(DieIf(true), "DieIf\\(\\)");
EXPECT_DEATH(DieIfLessThan(2, 3), "DieIfLessThan");
}
// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
TEST_F(TestForDeathTest, OutsideFixture) {
DeathTestSubroutine();
}
// Tests that death tests can be done inside a loop.
TEST_F(TestForDeathTest, InsideLoop) {
for (int i = 0; i < 5; i++) {
EXPECT_DEATH(DieIfLessThan(-1, i), "DieIfLessThan") << "where i == " << i;
}
}
// Tests that a compound statement can be used in a death test.
TEST_F(TestForDeathTest, CompoundStatement) {
EXPECT_DEATH({ // NOLINT
const int x = 2;
const int y = x + 1;
DieIfLessThan(x, y);
},
"DieIfLessThan");
}
// Tests that code that doesn't die causes a death test to fail.
TEST_F(TestForDeathTest, DoesNotDie) {
EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(DieIf(false), "DieIf"),
"failed to die");
}
// Tests that a death test fails when the error message isn't expected.
TEST_F(TestForDeathTest, ErrorMessageMismatch) {
EXPECT_NONFATAL_FAILURE({ // NOLINT
EXPECT_DEATH(DieIf(true), "DieIfLessThan") << "End of death test message.";
}, "died but not with expected error");
}
// On exit, *aborted will be true iff the EXPECT_DEATH() statement
// aborted the function.
void ExpectDeathTestHelper(bool* aborted) {
*aborted = true;
EXPECT_DEATH(DieIf(false), "DieIf"); // This assertion should fail.
*aborted = false;
}
// Tests that EXPECT_DEATH doesn't abort the test on failure.
TEST_F(TestForDeathTest, EXPECT_DEATH) {
bool aborted = true;
EXPECT_NONFATAL_FAILURE(ExpectDeathTestHelper(&aborted),
"failed to die");
EXPECT_FALSE(aborted);
}
// Tests that ASSERT_DEATH does abort the test on failure.
TEST_F(TestForDeathTest, ASSERT_DEATH) {
static bool aborted;
EXPECT_FATAL_FAILURE({ // NOLINT
aborted = true;
ASSERT_DEATH(DieIf(false), "DieIf"); // This assertion should fail.
aborted = false;
}, "failed to die");
EXPECT_TRUE(aborted);
}
// Tests that EXPECT_DEATH evaluates the arguments exactly once.
TEST_F(TestForDeathTest, SingleEvaluation) {
int x = 3;
EXPECT_DEATH(DieIf((++x) == 4), "DieIf");
const char* regex = "DieIf";
const char* regex_save = regex;
EXPECT_DEATH(DieIfLessThan(3, 4), regex++);
EXPECT_EQ(regex_save + 1, regex);
}
// Tests that run-away death tests are reported as failures.
TEST_F(TestForDeathTest, RunawayIsFailure) {
EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(static_cast<void>(0), "Foo"),
"failed to die.");
}
// Tests that death tests report executing 'return' in the statement as
// failure.
TEST_F(TestForDeathTest, ReturnIsFailure) {
EXPECT_FATAL_FAILURE(ASSERT_DEATH(return, "Bar"),
"illegal return in test statement.");
}
// Tests that EXPECT_DEBUG_DEATH works as expected, that is, you can stream a
// message to it, and in debug mode it:
// 1. Asserts on death.
// 2. Has no side effect.
//
// And in opt mode, it:
// 1. Has side effects but does not assert.
TEST_F(TestForDeathTest, TestExpectDebugDeath) {
int sideeffect = 0;
EXPECT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), "death.*DieInDebugElse12")
<< "Must accept a streamed message";
# ifdef NDEBUG
// Checks that the assignment occurs in opt mode (sideeffect).
EXPECT_EQ(12, sideeffect);
# else
// Checks that the assignment does not occur in dbg mode (no sideeffect).
EXPECT_EQ(0, sideeffect);
# endif
}
// Tests that ASSERT_DEBUG_DEATH works as expected, that is, you can stream a
// message to it, and in debug mode it:
// 1. Asserts on death.
// 2. Has no side effect.
//
// And in opt mode, it:
// 1. Has side effects but does not assert.
TEST_F(TestForDeathTest, TestAssertDebugDeath) {
int sideeffect = 0;
ASSERT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), "death.*DieInDebugElse12")
<< "Must accept a streamed message";
# ifdef NDEBUG
// Checks that the assignment occurs in opt mode (sideeffect).
EXPECT_EQ(12, sideeffect);
# else
// Checks that the assignment does not occur in dbg mode (no sideeffect).
EXPECT_EQ(0, sideeffect);
# endif
}
# ifndef NDEBUG
void ExpectDebugDeathHelper(bool* aborted) {
*aborted = true;
EXPECT_DEBUG_DEATH(return, "") << "This is expected to fail.";
*aborted = false;
}
# if GTEST_OS_WINDOWS
TEST(PopUpDeathTest, DoesNotShowPopUpOnAbort) {
printf("This test should be considered failing if it shows "
"any pop-up dialogs.\n");
fflush(stdout);
EXPECT_DEATH({
testing::GTEST_FLAG(catch_exceptions) = false;
abort();
}, "");
}
# endif // GTEST_OS_WINDOWS
// Tests that EXPECT_DEBUG_DEATH in debug mode does not abort
// the function.
TEST_F(TestForDeathTest, ExpectDebugDeathDoesNotAbort) {
bool aborted = true;
EXPECT_NONFATAL_FAILURE(ExpectDebugDeathHelper(&aborted), "");
EXPECT_FALSE(aborted);
}
void AssertDebugDeathHelper(bool* aborted) {
*aborted = true;
ASSERT_DEBUG_DEATH(return, "") << "This is expected to fail.";
*aborted = false;
}
// Tests that ASSERT_DEBUG_DEATH in debug mode aborts the function on
// failure.
TEST_F(TestForDeathTest, AssertDebugDeathAborts) {
static bool aborted;
aborted = false;
EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
EXPECT_TRUE(aborted);
}
# endif // _NDEBUG
// Tests the *_EXIT family of macros, using a variety of predicates.
static void TestExitMacros() {
EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
ASSERT_EXIT(_exit(42), testing::ExitedWithCode(42), "");
# if GTEST_OS_WINDOWS
// Of all signals effects on the process exit code, only those of SIGABRT
// are documented on Windows.
// See http://msdn.microsoft.com/en-us/library/dwwzkt4c(VS.71).aspx.
EXPECT_EXIT(raise(SIGABRT), testing::ExitedWithCode(3), "") << "b_ar";
# else
EXPECT_EXIT(raise(SIGKILL), testing::KilledBySignal(SIGKILL), "") << "foo";
ASSERT_EXIT(raise(SIGUSR2), testing::KilledBySignal(SIGUSR2), "") << "bar";
EXPECT_FATAL_FAILURE({ // NOLINT
ASSERT_EXIT(_exit(0), testing::KilledBySignal(SIGSEGV), "")
<< "This failure is expected, too.";
}, "This failure is expected, too.");
# endif // GTEST_OS_WINDOWS
EXPECT_NONFATAL_FAILURE({ // NOLINT
EXPECT_EXIT(raise(SIGSEGV), testing::ExitedWithCode(0), "")
<< "This failure is expected.";
}, "This failure is expected.");
}
TEST_F(TestForDeathTest, ExitMacros) {
TestExitMacros();
}
TEST_F(TestForDeathTest, ExitMacrosUsingFork) {
testing::GTEST_FLAG(death_test_use_fork) = true;
TestExitMacros();
}
TEST_F(TestForDeathTest, InvalidStyle) {
testing::GTEST_FLAG(death_test_style) = "rococo";
EXPECT_NONFATAL_FAILURE({ // NOLINT
EXPECT_DEATH(_exit(0), "") << "This failure is expected.";
}, "This failure is expected.");
}
TEST_F(TestForDeathTest, DeathTestFailedOutput) {
testing::GTEST_FLAG(death_test_style) = "fast";
EXPECT_NONFATAL_FAILURE(
EXPECT_DEATH(DieWithMessage("death\n"),
"expected message"),
"Actual msg:\n"
"[ DEATH ] death\n");
}
TEST_F(TestForDeathTest, DeathTestUnexpectedReturnOutput) {
testing::GTEST_FLAG(death_test_style) = "fast";
EXPECT_NONFATAL_FAILURE(
EXPECT_DEATH({
fprintf(stderr, "returning\n");
fflush(stderr);
return;
}, ""),
" Result: illegal return in test statement.\n"
" Error msg:\n"
"[ DEATH ] returning\n");
}
TEST_F(TestForDeathTest, DeathTestBadExitCodeOutput) {
testing::GTEST_FLAG(death_test_style) = "fast";
EXPECT_NONFATAL_FAILURE(
EXPECT_EXIT(DieWithMessage("exiting with rc 1\n"),
testing::ExitedWithCode(3),
"expected message"),
" Result: died but not with expected exit code:\n"
" Exited with exit status 1\n"
"Actual msg:\n"
"[ DEATH ] exiting with rc 1\n");
}
TEST_F(TestForDeathTest, DeathTestMultiLineMatchFail) {
testing::GTEST_FLAG(death_test_style) = "fast";
EXPECT_NONFATAL_FAILURE(
EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
"line 1\nxyz\nline 3\n"),
"Actual msg:\n"
"[ DEATH ] line 1\n"
"[ DEATH ] line 2\n"
"[ DEATH ] line 3\n");
}
TEST_F(TestForDeathTest, DeathTestMultiLineMatchPass) {
testing::GTEST_FLAG(death_test_style) = "fast";
EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
"line 1\nline 2\nline 3\n");
}
// A DeathTestFactory that returns MockDeathTests.
class MockDeathTestFactory : public DeathTestFactory {
public:
MockDeathTestFactory();
virtual bool Create(const char* statement,
const ::testing::internal::RE* regex,
const char* file, int line, DeathTest** test);
// Sets the parameters for subsequent calls to Create.
void SetParameters(bool create, DeathTest::TestRole role,
int status, bool passed);
// Accessors.
int AssumeRoleCalls() const { return assume_role_calls_; }
int WaitCalls() const { return wait_calls_; }
int PassedCalls() const { return passed_args_.size(); }
bool PassedArgument(int n) const { return passed_args_[n]; }
int AbortCalls() const { return abort_args_.size(); }
DeathTest::AbortReason AbortArgument(int n) const {
return abort_args_[n];
}
bool TestDeleted() const { return test_deleted_; }
private:
friend class MockDeathTest;
// If true, Create will return a MockDeathTest; otherwise it returns
// NULL.
bool create_;
// The value a MockDeathTest will return from its AssumeRole method.
DeathTest::TestRole role_;
// The value a MockDeathTest will return from its Wait method.
int status_;
// The value a MockDeathTest will return from its Passed method.
bool passed_;
// Number of times AssumeRole was called.
int assume_role_calls_;
// Number of times Wait was called.
int wait_calls_;
// The arguments to the calls to Passed since the last call to
// SetParameters.
std::vector<bool> passed_args_;
// The arguments to the calls to Abort since the last call to
// SetParameters.
std::vector<DeathTest::AbortReason> abort_args_;
// True if the last MockDeathTest returned by Create has been
// deleted.
bool test_deleted_;
};
// A DeathTest implementation useful in testing. It returns values set
// at its creation from its various inherited DeathTest methods, and
// reports calls to those methods to its parent MockDeathTestFactory
// object.
class MockDeathTest : public DeathTest {
public:
MockDeathTest(MockDeathTestFactory *parent,
TestRole role, int status, bool passed) :
parent_(parent), role_(role), status_(status), passed_(passed) {
}
virtual ~MockDeathTest() {
parent_->test_deleted_ = true;
}
virtual TestRole AssumeRole() {
++parent_->assume_role_calls_;
return role_;
}
virtual int Wait() {
++parent_->wait_calls_;
return status_;
}
virtual bool Passed(bool exit_status_ok) {
parent_->passed_args_.push_back(exit_status_ok);
return passed_;
}
virtual void Abort(AbortReason reason) {
parent_->abort_args_.push_back(reason);
}
private:
MockDeathTestFactory* const parent_;
const TestRole role_;
const int status_;
const bool passed_;
};
// MockDeathTestFactory constructor.
MockDeathTestFactory::MockDeathTestFactory()
: create_(true),
role_(DeathTest::OVERSEE_TEST),
status_(0),
passed_(true),
assume_role_calls_(0),
wait_calls_(0),
passed_args_(),
abort_args_() {
}
// Sets the parameters for subsequent calls to Create.
void MockDeathTestFactory::SetParameters(bool create,
DeathTest::TestRole role,
int status, bool passed) {
create_ = create;
role_ = role;
status_ = status;
passed_ = passed;
assume_role_calls_ = 0;
wait_calls_ = 0;
passed_args_.clear();
abort_args_.clear();
}
// Sets test to NULL (if create_ is false) or to the address of a new
// MockDeathTest object with parameters taken from the last call
// to SetParameters (if create_ is true). Always returns true.
bool MockDeathTestFactory::Create(const char* /*statement*/,
const ::testing::internal::RE* /*regex*/,
const char* /*file*/,
int /*line*/,
DeathTest** test) {
test_deleted_ = false;
if (create_) {
*test = new MockDeathTest(this, role_, status_, passed_);
} else {
*test = NULL;
}
return true;
}
// A test fixture for testing the logic of the GTEST_DEATH_TEST_ macro.
// It installs a MockDeathTestFactory that is used for the duration
// of the test case.
class MacroLogicDeathTest : public testing::Test {
protected:
static testing::internal::ReplaceDeathTestFactory* replacer_;
static MockDeathTestFactory* factory_;
static void SetUpTestCase() {
factory_ = new MockDeathTestFactory;
replacer_ = new testing::internal::ReplaceDeathTestFactory(factory_);
}
static void TearDownTestCase() {
delete replacer_;
replacer_ = NULL;
delete factory_;
factory_ = NULL;
}
// Runs a death test that breaks the rules by returning. Such a death
// test cannot be run directly from a test routine that uses a
// MockDeathTest, or the remainder of the routine will not be executed.
static void RunReturningDeathTest(bool* flag) {
ASSERT_DEATH({ // NOLINT
*flag = true;
return;
}, "");
}
};
testing::internal::ReplaceDeathTestFactory* MacroLogicDeathTest::replacer_
= NULL;
MockDeathTestFactory* MacroLogicDeathTest::factory_ = NULL;
// Test that nothing happens when the factory doesn't return a DeathTest:
TEST_F(MacroLogicDeathTest, NothingHappens) {
bool flag = false;
factory_->SetParameters(false, DeathTest::OVERSEE_TEST, 0, true);
EXPECT_DEATH(flag = true, "");
EXPECT_FALSE(flag);
EXPECT_EQ(0, factory_->AssumeRoleCalls());
EXPECT_EQ(0, factory_->WaitCalls());
EXPECT_EQ(0, factory_->PassedCalls());
EXPECT_EQ(0, factory_->AbortCalls());
EXPECT_FALSE(factory_->TestDeleted());
}
// Test that the parent process doesn't run the death test code,
// and that the Passed method returns false when the (simulated)
// child process exits with status 0:
TEST_F(MacroLogicDeathTest, ChildExitsSuccessfully) {
bool flag = false;
factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 0, true);
EXPECT_DEATH(flag = true, "");
EXPECT_FALSE(flag);
EXPECT_EQ(1, factory_->AssumeRoleCalls());
EXPECT_EQ(1, factory_->WaitCalls());
ASSERT_EQ(1, factory_->PassedCalls());
EXPECT_FALSE(factory_->PassedArgument(0));
EXPECT_EQ(0, factory_->AbortCalls());
EXPECT_TRUE(factory_->TestDeleted());
}
// Tests that the Passed method was given the argument "true" when
// the (simulated) child process exits with status 1:
TEST_F(MacroLogicDeathTest, ChildExitsUnsuccessfully) {
bool flag = false;
factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 1, true);
EXPECT_DEATH(flag = true, "");
EXPECT_FALSE(flag);
EXPECT_EQ(1, factory_->AssumeRoleCalls());
EXPECT_EQ(1, factory_->WaitCalls());
ASSERT_EQ(1, factory_->PassedCalls());
EXPECT_TRUE(factory_->PassedArgument(0));
EXPECT_EQ(0, factory_->AbortCalls());
EXPECT_TRUE(factory_->TestDeleted());
}
// Tests that the (simulated) child process executes the death test
// code, and is aborted with the correct AbortReason if it
// executes a return statement.
TEST_F(MacroLogicDeathTest, ChildPerformsReturn) {
bool flag = false;
factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
RunReturningDeathTest(&flag);
EXPECT_TRUE(flag);
EXPECT_EQ(1, factory_->AssumeRoleCalls());
EXPECT_EQ(0, factory_->WaitCalls());
EXPECT_EQ(0, factory_->PassedCalls());
EXPECT_EQ(1, factory_->AbortCalls());
EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
factory_->AbortArgument(0));
EXPECT_TRUE(factory_->TestDeleted());
}
// Tests that the (simulated) child process is aborted with the
// correct AbortReason if it does not die.
TEST_F(MacroLogicDeathTest, ChildDoesNotDie) {
bool flag = false;
factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
EXPECT_DEATH(flag = true, "");
EXPECT_TRUE(flag);
EXPECT_EQ(1, factory_->AssumeRoleCalls());
EXPECT_EQ(0, factory_->WaitCalls());
EXPECT_EQ(0, factory_->PassedCalls());
// This time there are two calls to Abort: one since the test didn't
// die, and another from the ReturnSentinel when it's destroyed. The
// sentinel normally isn't destroyed if a test doesn't die, since
// _exit(2) is called in that case by ForkingDeathTest, but not by
// our MockDeathTest.
ASSERT_EQ(2, factory_->AbortCalls());
EXPECT_EQ(DeathTest::TEST_DID_NOT_DIE,
factory_->AbortArgument(0));
EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
factory_->AbortArgument(1));
EXPECT_TRUE(factory_->TestDeleted());
}
// Tests that a successful death test does not register a successful
// test part.
TEST(SuccessRegistrationDeathTest, NoSuccessPart) {
EXPECT_DEATH(_exit(1), "");
EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
}
TEST(StreamingAssertionsDeathTest, DeathTest) {
EXPECT_DEATH(_exit(1), "") << "unexpected failure";
ASSERT_DEATH(_exit(1), "") << "unexpected failure";
EXPECT_NONFATAL_FAILURE({ // NOLINT
EXPECT_DEATH(_exit(0), "") << "expected failure";
}, "expected failure");
EXPECT_FATAL_FAILURE({ // NOLINT
ASSERT_DEATH(_exit(0), "") << "expected failure";
}, "expected failure");
}
// Tests that GetLastErrnoDescription returns an empty string when the
// last error is 0 and non-empty string when it is non-zero.
TEST(GetLastErrnoDescription, GetLastErrnoDescriptionWorks) {
errno = ENOENT;
EXPECT_STRNE("", GetLastErrnoDescription().c_str());
errno = 0;
EXPECT_STREQ("", GetLastErrnoDescription().c_str());
}
# if GTEST_OS_WINDOWS
TEST(AutoHandleTest, AutoHandleWorks) {
HANDLE handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
ASSERT_NE(INVALID_HANDLE_VALUE, handle);
// Tests that the AutoHandle is correctly initialized with a handle.
testing::internal::AutoHandle auto_handle(handle);
EXPECT_EQ(handle, auto_handle.Get());
// Tests that Reset assigns INVALID_HANDLE_VALUE.
// Note that this cannot verify whether the original handle is closed.
auto_handle.Reset();
EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle.Get());
// Tests that Reset assigns the new handle.
// Note that this cannot verify whether the original handle is closed.
handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
ASSERT_NE(INVALID_HANDLE_VALUE, handle);
auto_handle.Reset(handle);
EXPECT_EQ(handle, auto_handle.Get());
// Tests that AutoHandle contains INVALID_HANDLE_VALUE by default.
testing::internal::AutoHandle auto_handle2;
EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle2.Get());
}
# endif // GTEST_OS_WINDOWS
# if GTEST_OS_WINDOWS
typedef unsigned __int64 BiggestParsable;
typedef signed __int64 BiggestSignedParsable;
# else
typedef unsigned long long BiggestParsable;
typedef signed long long BiggestSignedParsable;
# endif // GTEST_OS_WINDOWS
// We cannot use std::numeric_limits<T>::max() as it clashes with the
// max() macro defined by <windows.h>.
const BiggestParsable kBiggestParsableMax = ULLONG_MAX;
const BiggestSignedParsable kBiggestSignedParsableMax = LLONG_MAX;
TEST(ParseNaturalNumberTest, RejectsInvalidFormat) {
BiggestParsable result = 0;
// Rejects non-numbers.
EXPECT_FALSE(ParseNaturalNumber("non-number string", &result));
// Rejects numbers with whitespace prefix.
EXPECT_FALSE(ParseNaturalNumber(" 123", &result));
// Rejects negative numbers.
EXPECT_FALSE(ParseNaturalNumber("-123", &result));
// Rejects numbers starting with a plus sign.
EXPECT_FALSE(ParseNaturalNumber("+123", &result));
errno = 0;
}
TEST(ParseNaturalNumberTest, RejectsOverflownNumbers) {
BiggestParsable result = 0;
EXPECT_FALSE(ParseNaturalNumber("99999999999999999999999", &result));
signed char char_result = 0;
EXPECT_FALSE(ParseNaturalNumber("200", &char_result));
errno = 0;
}
TEST(ParseNaturalNumberTest, AcceptsValidNumbers) {
BiggestParsable result = 0;
result = 0;
ASSERT_TRUE(ParseNaturalNumber("123", &result));
EXPECT_EQ(123U, result);
// Check 0 as an edge case.
result = 1;
ASSERT_TRUE(ParseNaturalNumber("0", &result));
EXPECT_EQ(0U, result);
result = 1;
ASSERT_TRUE(ParseNaturalNumber("00000", &result));
EXPECT_EQ(0U, result);
}
TEST(ParseNaturalNumberTest, AcceptsTypeLimits) {
Message msg;
msg << kBiggestParsableMax;
BiggestParsable result = 0;
EXPECT_TRUE(ParseNaturalNumber(msg.GetString(), &result));
EXPECT_EQ(kBiggestParsableMax, result);
Message msg2;
msg2 << kBiggestSignedParsableMax;
BiggestSignedParsable signed_result = 0;
EXPECT_TRUE(ParseNaturalNumber(msg2.GetString(), &signed_result));
EXPECT_EQ(kBiggestSignedParsableMax, signed_result);
Message msg3;
msg3 << INT_MAX;
int int_result = 0;
EXPECT_TRUE(ParseNaturalNumber(msg3.GetString(), &int_result));
EXPECT_EQ(INT_MAX, int_result);
Message msg4;
msg4 << UINT_MAX;
unsigned int uint_result = 0;
EXPECT_TRUE(ParseNaturalNumber(msg4.GetString(), &uint_result));
EXPECT_EQ(UINT_MAX, uint_result);
}
TEST(ParseNaturalNumberTest, WorksForShorterIntegers) {
short short_result = 0;
ASSERT_TRUE(ParseNaturalNumber("123", &short_result));
EXPECT_EQ(123, short_result);
signed char char_result = 0;
ASSERT_TRUE(ParseNaturalNumber("123", &char_result));
EXPECT_EQ(123, char_result);
}
# if GTEST_OS_WINDOWS
TEST(EnvironmentTest, HandleFitsIntoSizeT) {
// TODO(vladl@google.com): Remove this test after this condition is verified
// in a static assertion in gtest-death-test.cc in the function
// GetStatusFileDescriptor.
ASSERT_TRUE(sizeof(HANDLE) <= sizeof(size_t));
}
# endif // GTEST_OS_WINDOWS
// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED trigger
// failures when death tests are available on the system.
TEST(ConditionalDeathMacrosDeathTest, ExpectsDeathWhenDeathTestsAvailable) {
EXPECT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestExpectMacro"),
"death inside CondDeathTestExpectMacro");
ASSERT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestAssertMacro"),
"death inside CondDeathTestAssertMacro");
// Empty statement will not crash, which must trigger a failure.
EXPECT_NONFATAL_FAILURE(EXPECT_DEATH_IF_SUPPORTED(;, ""), "");
EXPECT_FATAL_FAILURE(ASSERT_DEATH_IF_SUPPORTED(;, ""), "");
}
#else
using testing::internal::CaptureStderr;
using testing::internal::GetCapturedStderr;
// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED are still
// defined but do not trigger failures when death tests are not available on
// the system.
TEST(ConditionalDeathMacrosTest, WarnsWhenDeathTestsNotAvailable) {
// Empty statement will not crash, but that should not trigger a failure
// when death tests are not supported.
CaptureStderr();
EXPECT_DEATH_IF_SUPPORTED(;, "");
std::string output = GetCapturedStderr();
ASSERT_TRUE(NULL != strstr(output.c_str(),
"Death tests are not supported on this platform"));
ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
// The streamed message should not be printed as there is no test failure.
CaptureStderr();
EXPECT_DEATH_IF_SUPPORTED(;, "") << "streamed message";
output = GetCapturedStderr();
ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
CaptureStderr();
ASSERT_DEATH_IF_SUPPORTED(;, ""); // NOLINT
output = GetCapturedStderr();
ASSERT_TRUE(NULL != strstr(output.c_str(),
"Death tests are not supported on this platform"));
ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
CaptureStderr();
ASSERT_DEATH_IF_SUPPORTED(;, "") << "streamed message"; // NOLINT
output = GetCapturedStderr();
ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
}
void FuncWithAssert(int* n) {
ASSERT_DEATH_IF_SUPPORTED(return;, "");
(*n)++;
}
// Tests that ASSERT_DEATH_IF_SUPPORTED does not return from the current
// function (as ASSERT_DEATH does) if death tests are not supported.
TEST(ConditionalDeathMacrosTest, AssertDeatDoesNotReturnhIfUnsupported) {
int n = 0;
FuncWithAssert(&n);
EXPECT_EQ(1, n);
}
TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInFastStyle) {
testing::GTEST_FLAG(death_test_style) = "fast";
EXPECT_FALSE(InDeathTestChild());
EXPECT_DEATH({
fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
fflush(stderr);
_exit(1);
}, "Inside");
}
TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInThreadSafeStyle) {
testing::GTEST_FLAG(death_test_style) = "threadsafe";
EXPECT_FALSE(InDeathTestChild());
EXPECT_DEATH({
fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
fflush(stderr);
_exit(1);
}, "Inside");
}
#endif // GTEST_HAS_DEATH_TEST
// Tests that the death test macros expand to code which may or may not
// be followed by operator<<, and that in either case the complete text
// comprises only a single C++ statement.
//
// The syntax should work whether death tests are available or not.
TEST(ConditionalDeathMacrosSyntaxDeathTest, SingleStatement) {
if (AlwaysFalse())
// This would fail if executed; this is a compilation test only
ASSERT_DEATH_IF_SUPPORTED(return, "");
if (AlwaysTrue())
EXPECT_DEATH_IF_SUPPORTED(_exit(1), "");
else
// This empty "else" branch is meant to ensure that EXPECT_DEATH
// doesn't expand into an "if" statement without an "else"
; // NOLINT
if (AlwaysFalse())
ASSERT_DEATH_IF_SUPPORTED(return, "") << "did not die";
if (AlwaysFalse())
; // NOLINT
else
EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << 1 << 2 << 3;
}
// Tests that conditional death test macros expand to code which interacts
// well with switch statements.
TEST(ConditionalDeathMacrosSyntaxDeathTest, SwitchStatement) {
// Microsoft compiler usually complains about switch statements without
// case labels. We suppress that warning for this test.
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable: 4065)
#endif // _MSC_VER
switch (0)
default:
ASSERT_DEATH_IF_SUPPORTED(_exit(1), "")
<< "exit in default switch handler";
switch (0)
case 0:
EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << "exit in switch case";
#ifdef _MSC_VER
# pragma warning(pop)
#endif // _MSC_VER
}
// Tests that a test case whose name ends with "DeathTest" works fine
// on Windows.
TEST(NotADeathTest, Test) {
SUCCEED();
}
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