ref: be51a7731d009be79cbc4cdd0a3009fc4c287291
dir: /third_party/googletest/src/include/gtest/internal/gtest-death-test-internal.h/
// Copyright 2005, Google Inc.
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// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
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//
// The Google C++ Testing Framework (Google Test)
//
// This header file defines internal utilities needed for implementing
// death tests. They are subject to change without notice.
#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
#include "gtest/internal/gtest-internal.h"
#include <stdio.h>
namespace testing {
namespace internal {
GTEST_DECLARE_string_(internal_run_death_test);
// Names of the flags (needed for parsing Google Test flags).
const char kDeathTestStyleFlag[] = "death_test_style";
const char kDeathTestUseFork[] = "death_test_use_fork";
const char kInternalRunDeathTestFlag[] = "internal_run_death_test";
#if GTEST_HAS_DEATH_TEST
// DeathTest is a class that hides much of the complexity of the
// GTEST_DEATH_TEST_ macro. It is abstract; its static Create method
// returns a concrete class that depends on the prevailing death test
// style, as defined by the --gtest_death_test_style and/or
// --gtest_internal_run_death_test flags.
// In describing the results of death tests, these terms are used with
// the corresponding definitions:
//
// exit status: The integer exit information in the format specified
// by wait(2)
// exit code: The integer code passed to exit(3), _exit(2), or
// returned from main()
class GTEST_API_ DeathTest {
public:
// Create returns false if there was an error determining the
// appropriate action to take for the current death test; for example,
// if the gtest_death_test_style flag is set to an invalid value.
// The LastMessage method will return a more detailed message in that
// case. Otherwise, the DeathTest pointer pointed to by the "test"
// argument is set. If the death test should be skipped, the pointer
// is set to NULL; otherwise, it is set to the address of a new concrete
// DeathTest object that controls the execution of the current test.
static bool Create(const char* statement, const RE* regex,
const char* file, int line, DeathTest** test);
DeathTest();
virtual ~DeathTest() { }
// A helper class that aborts a death test when it's deleted.
class ReturnSentinel {
public:
explicit ReturnSentinel(DeathTest* test) : test_(test) { }
~ReturnSentinel() { test_->Abort(TEST_ENCOUNTERED_RETURN_STATEMENT); }
private:
DeathTest* const test_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(ReturnSentinel);
} GTEST_ATTRIBUTE_UNUSED_;
// An enumeration of possible roles that may be taken when a death
// test is encountered. EXECUTE means that the death test logic should
// be executed immediately. OVERSEE means that the program should prepare
// the appropriate environment for a child process to execute the death
// test, then wait for it to complete.
enum TestRole { OVERSEE_TEST, EXECUTE_TEST };
// An enumeration of the three reasons that a test might be aborted.
enum AbortReason {
TEST_ENCOUNTERED_RETURN_STATEMENT,
TEST_THREW_EXCEPTION,
TEST_DID_NOT_DIE
};
// Assumes one of the above roles.
virtual TestRole AssumeRole() = 0;
// Waits for the death test to finish and returns its status.
virtual int Wait() = 0;
// Returns true if the death test passed; that is, the test process
// exited during the test, its exit status matches a user-supplied
// predicate, and its stderr output matches a user-supplied regular
// expression.
// The user-supplied predicate may be a macro expression rather
// than a function pointer or functor, or else Wait and Passed could
// be combined.
virtual bool Passed(bool exit_status_ok) = 0;
// Signals that the death test did not die as expected.
virtual void Abort(AbortReason reason) = 0;
// Returns a human-readable outcome message regarding the outcome of
// the last death test.
static const char* LastMessage();
static void set_last_death_test_message(const std::string& message);
private:
// A string containing a description of the outcome of the last death test.
static std::string last_death_test_message_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(DeathTest);
};
// Factory interface for death tests. May be mocked out for testing.
class DeathTestFactory {
public:
virtual ~DeathTestFactory() { }
virtual bool Create(const char* statement, const RE* regex,
const char* file, int line, DeathTest** test) = 0;
};
// A concrete DeathTestFactory implementation for normal use.
class DefaultDeathTestFactory : public DeathTestFactory {
public:
virtual bool Create(const char* statement, const RE* regex,
const char* file, int line, DeathTest** test);
};
// Returns true if exit_status describes a process that was terminated
// by a signal, or exited normally with a nonzero exit code.
GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
// Traps C++ exceptions escaping statement and reports them as test
// failures. Note that trapping SEH exceptions is not implemented here.
# if GTEST_HAS_EXCEPTIONS
# define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
try { \
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
} catch (const ::std::exception& gtest_exception) { \
fprintf(\
stderr, \
"\n%s: Caught std::exception-derived exception escaping the " \
"death test statement. Exception message: %s\n", \
::testing::internal::FormatFileLocation(__FILE__, __LINE__).c_str(), \
gtest_exception.what()); \
fflush(stderr); \
death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
} catch (...) { \
death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
}
# else
# define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
# endif
// This macro is for implementing ASSERT_DEATH*, EXPECT_DEATH*,
// ASSERT_EXIT*, and EXPECT_EXIT*.
# define GTEST_DEATH_TEST_(statement, predicate, regex, fail) \
GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
if (::testing::internal::AlwaysTrue()) { \
const ::testing::internal::RE& gtest_regex = (regex); \
::testing::internal::DeathTest* gtest_dt; \
if (!::testing::internal::DeathTest::Create(#statement, >est_regex, \
__FILE__, __LINE__, >est_dt)) { \
goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__); \
} \
if (gtest_dt != NULL) { \
::testing::internal::scoped_ptr< ::testing::internal::DeathTest> \
gtest_dt_ptr(gtest_dt); \
switch (gtest_dt->AssumeRole()) { \
case ::testing::internal::DeathTest::OVERSEE_TEST: \
if (!gtest_dt->Passed(predicate(gtest_dt->Wait()))) { \
goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__); \
} \
break; \
case ::testing::internal::DeathTest::EXECUTE_TEST: { \
::testing::internal::DeathTest::ReturnSentinel \
gtest_sentinel(gtest_dt); \
GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, gtest_dt); \
gtest_dt->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE); \
break; \
} \
default: \
break; \
} \
} \
} else \
GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__): \
fail(::testing::internal::DeathTest::LastMessage())
// The symbol "fail" here expands to something into which a message
// can be streamed.
// This macro is for implementing ASSERT/EXPECT_DEBUG_DEATH when compiled in
// NDEBUG mode. In this case we need the statements to be executed and the macro
// must accept a streamed message even though the message is never printed.
// The regex object is not evaluated, but it is used to prevent "unused"
// warnings and to avoid an expression that doesn't compile in debug mode.
#define GTEST_EXECUTE_STATEMENT_(statement, regex) \
GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
if (::testing::internal::AlwaysTrue()) { \
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
} else if (!::testing::internal::AlwaysTrue()) { \
const ::testing::internal::RE& gtest_regex = (regex); \
static_cast<void>(gtest_regex); \
} else \
::testing::Message()
// A class representing the parsed contents of the
// --gtest_internal_run_death_test flag, as it existed when
// RUN_ALL_TESTS was called.
class InternalRunDeathTestFlag {
public:
InternalRunDeathTestFlag(const std::string& a_file,
int a_line,
int an_index,
int a_write_fd)
: file_(a_file), line_(a_line), index_(an_index),
write_fd_(a_write_fd) {}
~InternalRunDeathTestFlag() {
if (write_fd_ >= 0)
posix::Close(write_fd_);
}
const std::string& file() const { return file_; }
int line() const { return line_; }
int index() const { return index_; }
int write_fd() const { return write_fd_; }
private:
std::string file_;
int line_;
int index_;
int write_fd_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(InternalRunDeathTestFlag);
};
// Returns a newly created InternalRunDeathTestFlag object with fields
// initialized from the GTEST_FLAG(internal_run_death_test) flag if
// the flag is specified; otherwise returns NULL.
InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag();
#endif // GTEST_HAS_DEATH_TEST
} // namespace internal
} // namespace testing
#endif // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_