test/gtest-extra-test.cc - platform/external/fmtlib - Git at Google

 // Formatting library for C++ - tests of custom Google Test assertions
 //
 // Copyright (c) 2012 - present, Victor Zverovich
 // All rights reserved.
 //
 // For the license information refer to format.h.

 #include "gtest-extra.h"

 #include <cstring>
 #include <algorithm>
 #include <stdexcept>
 #include <gtest/gtest-spi.h>

 #if defined(_WIN32) && !defined(__MINGW32__)
 # include <crtdbg.h>  // for _CrtSetReportMode
 #endif  // _WIN32

 #include "util.h"

 using testing::internal::scoped_ptr;

 namespace {

 // This is used to suppress coverity warnings about untrusted values.
 std::string sanitize(const std::string &s) {
   std::string result;
   for (std::string::const_iterator i = s.begin(), end = s.end(); i != end; ++i)
     result.push_back(static_cast<char>(*i & 0xff));
   return result;
 }

 // Tests that assertion macros evaluate their arguments exactly once.
 class SingleEvaluationTest : public ::testing::Test {
  protected:
   SingleEvaluationTest() {
     p_ = s_;
     a_ = 0;
     b_ = 0;
   }

   static const char* const s_;
   static const char* p_;

   static int a_;
   static int b_;
 };

 const char* const SingleEvaluationTest::s_ = "01234";
 const char* SingleEvaluationTest::p_;
 int SingleEvaluationTest::a_;
 int SingleEvaluationTest::b_;

 void do_nothing() {}

 void throw_exception() {
   throw std::runtime_error("test");
 }

 void throw_system_error() {
   throw fmt::system_error(EDOM, "test");
 }

 // Tests that when EXPECT_THROW_MSG fails, it evaluates its message argument
 // exactly once.
 TEST_F(SingleEvaluationTest, FailedEXPECT_THROW_MSG) {
   EXPECT_NONFATAL_FAILURE(
       EXPECT_THROW_MSG(throw_exception(), std::exception, p_++), "01234");
   EXPECT_EQ(s_ + 1, p_);
 }

 // Tests that when EXPECT_SYSTEM_ERROR fails, it evaluates its message argument
 // exactly once.
 TEST_F(SingleEvaluationTest, FailedEXPECT_SYSTEM_ERROR) {
   EXPECT_NONFATAL_FAILURE(
       EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, p_++), "01234");
   EXPECT_EQ(s_ + 1, p_);
 }

 // Tests that when EXPECT_WRITE fails, it evaluates its message argument
 // exactly once.
 TEST_F(SingleEvaluationTest, FailedEXPECT_WRITE) {
   EXPECT_NONFATAL_FAILURE(
       EXPECT_WRITE(stdout, std::printf("test"), p_++), "01234");
   EXPECT_EQ(s_ + 1, p_);
 }

 // Tests that assertion arguments are evaluated exactly once.
 TEST_F(SingleEvaluationTest, ExceptionTests) {
   // successful EXPECT_THROW_MSG
   EXPECT_THROW_MSG({  // NOLINT
     a_++;
     throw_exception();
   }, std::exception, (b_++, "test"));
   EXPECT_EQ(1, a_);
   EXPECT_EQ(1, b_);

   // failed EXPECT_THROW_MSG, throws different type
   EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG({  // NOLINT
     a_++;
     throw_exception();
   }, std::logic_error, (b_++, "test")), "throws a different type");
   EXPECT_EQ(2, a_);
   EXPECT_EQ(2, b_);

   // failed EXPECT_THROW_MSG, throws an exception with different message
   EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG({  // NOLINT
     a_++;
     throw_exception();
   }, std::exception, (b_++, "other")),
       "throws an exception with a different message");
   EXPECT_EQ(3, a_);
   EXPECT_EQ(3, b_);

   // failed EXPECT_THROW_MSG, throws nothing
   EXPECT_NONFATAL_FAILURE(
       EXPECT_THROW_MSG(a_++, std::exception, (b_++, "test")), "throws nothing");
   EXPECT_EQ(4, a_);
   EXPECT_EQ(4, b_);
 }

 TEST_F(SingleEvaluationTest, SystemErrorTests) {
   // successful EXPECT_SYSTEM_ERROR
   EXPECT_SYSTEM_ERROR({  // NOLINT
     a_++;
     throw_system_error();
   }, EDOM, (b_++, "test"));
   EXPECT_EQ(1, a_);
   EXPECT_EQ(1, b_);

   // failed EXPECT_SYSTEM_ERROR, throws different type
   EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR({  // NOLINT
     a_++;
     throw_exception();
   }, EDOM, (b_++, "test")), "throws a different type");
   EXPECT_EQ(2, a_);
   EXPECT_EQ(2, b_);

   // failed EXPECT_SYSTEM_ERROR, throws an exception with different message
   EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR({  // NOLINT
     a_++;
     throw_system_error();
   }, EDOM, (b_++, "other")),
       "throws an exception with a different message");
   EXPECT_EQ(3, a_);
   EXPECT_EQ(3, b_);

   // failed EXPECT_SYSTEM_ERROR, throws nothing
   EXPECT_NONFATAL_FAILURE(
       EXPECT_SYSTEM_ERROR(a_++, EDOM, (b_++, "test")), "throws nothing");
   EXPECT_EQ(4, a_);
   EXPECT_EQ(4, b_);
 }

 // Tests that assertion arguments are evaluated exactly once.
 TEST_F(SingleEvaluationTest, WriteTests) {
   // successful EXPECT_WRITE
   EXPECT_WRITE(stdout, {  // NOLINT
     a_++;
     std::printf("test");
   }, (b_++, "test"));
   EXPECT_EQ(1, a_);
   EXPECT_EQ(1, b_);

   // failed EXPECT_WRITE
   EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, {  // NOLINT
     a_++;
     std::printf("test");
   }, (b_++, "other")), "Actual: test");
   EXPECT_EQ(2, a_);
   EXPECT_EQ(2, b_);
 }

 // Tests that the compiler will not complain about unreachable code in the
 // EXPECT_THROW_MSG macro.
 TEST(ExpectThrowTest, DoesNotGenerateUnreachableCodeWarning) {
   int n = 0;
   using std::runtime_error;
   EXPECT_THROW_MSG(throw runtime_error(""), runtime_error, "");
   EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(n++, runtime_error, ""), "");
   EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(throw 1, runtime_error, ""), "");
   EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(
       throw runtime_error("a"), runtime_error, "b"), "");
 }

 // Tests that the compiler will not complain about unreachable code in the
 // EXPECT_SYSTEM_ERROR macro.
 TEST(ExpectSystemErrorTest, DoesNotGenerateUnreachableCodeWarning) {
   int n = 0;
   EXPECT_SYSTEM_ERROR(throw fmt::system_error(EDOM, "test"), EDOM, "test");
   EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(n++, EDOM, ""), "");
   EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(throw 1, EDOM, ""), "");
   EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(
       throw fmt::system_error(EDOM, "aaa"), EDOM, "bbb"), "");
 }

 TEST(AssertionSyntaxTest, ExceptionAssertionBehavesLikeSingleStatement) {
   if (::testing::internal::AlwaysFalse())
     EXPECT_THROW_MSG(do_nothing(), std::exception, "");

   if (::testing::internal::AlwaysTrue())
     EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
   else
     do_nothing();
 }

 TEST(AssertionSyntaxTest, SystemErrorAssertionBehavesLikeSingleStatement) {
   if (::testing::internal::AlwaysFalse())
     EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "");

   if (::testing::internal::AlwaysTrue())
     EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
   else
     do_nothing();
 }

 TEST(AssertionSyntaxTest, WriteAssertionBehavesLikeSingleStatement) {
   if (::testing::internal::AlwaysFalse())
     EXPECT_WRITE(stdout, std::printf("x"), "x");

   if (::testing::internal::AlwaysTrue())
     EXPECT_WRITE(stdout, std::printf("x"), "x");
   else
     do_nothing();
 }

 // Tests EXPECT_THROW_MSG.
 TEST(ExpectTest, EXPECT_THROW_MSG) {
   EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
   EXPECT_NONFATAL_FAILURE(
       EXPECT_THROW_MSG(throw_exception(), std::logic_error, "test"),
       "Expected: throw_exception() throws an exception of "
       "type std::logic_error.\n  Actual: it throws a different type.");
   EXPECT_NONFATAL_FAILURE(
       EXPECT_THROW_MSG(do_nothing(), std::exception, "test"),
       "Expected: do_nothing() throws an exception of type std::exception.\n"
       "  Actual: it throws nothing.");
   EXPECT_NONFATAL_FAILURE(
       EXPECT_THROW_MSG(throw_exception(), std::exception, "other"),
       "throw_exception() throws an exception with a different message.\n"
       "Expected: other\n"
       "  Actual: test");
 }

 // Tests EXPECT_SYSTEM_ERROR.
 TEST(ExpectTest, EXPECT_SYSTEM_ERROR) {
   EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
   EXPECT_NONFATAL_FAILURE(
       EXPECT_SYSTEM_ERROR(throw_exception(), EDOM, "test"),
       "Expected: throw_exception() throws an exception of "
       "type fmt::system_error.\n  Actual: it throws a different type.");
   EXPECT_NONFATAL_FAILURE(
       EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "test"),
       "Expected: do_nothing() throws an exception of type fmt::system_error.\n"
       "  Actual: it throws nothing.");
   EXPECT_NONFATAL_FAILURE(
       EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other"),
       fmt::format(
           "throw_system_error() throws an exception with a different message.\n"
           "Expected: {}\n"
           "  Actual: {}",
           format_system_error(EDOM, "other"),
           format_system_error(EDOM, "test")));
 }

 // Tests EXPECT_WRITE.
 TEST(ExpectTest, EXPECT_WRITE) {
   EXPECT_WRITE(stdout, do_nothing(), "");
   EXPECT_WRITE(stdout, std::printf("test"), "test");
   EXPECT_WRITE(stderr, std::fprintf(stderr, "test"), "test");
   EXPECT_NONFATAL_FAILURE(
       EXPECT_WRITE(stdout, std::printf("that"), "this"),
       "Expected: this\n"
       "  Actual: that");
 }

 TEST(StreamingAssertionsTest, EXPECT_THROW_MSG) {
   EXPECT_THROW_MSG(throw_exception(), std::exception, "test")
       << "unexpected failure";
   EXPECT_NONFATAL_FAILURE(
       EXPECT_THROW_MSG(throw_exception(), std::exception, "other")
       << "expected failure", "expected failure");
 }

 TEST(StreamingAssertionsTest, EXPECT_SYSTEM_ERROR) {
   EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test")
       << "unexpected failure";
   EXPECT_NONFATAL_FAILURE(
       EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other")
       << "expected failure", "expected failure");
 }

 TEST(StreamingAssertionsTest, EXPECT_WRITE) {
   EXPECT_WRITE(stdout, std::printf("test"), "test")
       << "unexpected failure";
   EXPECT_NONFATAL_FAILURE(
       EXPECT_WRITE(stdout, std::printf("test"), "other")
       << "expected failure", "expected failure");
 }

 TEST(UtilTest, FormatSystemError) {
   fmt::memory_buffer out;
   fmt::format_system_error(out, EDOM, "test message");
   EXPECT_EQ(to_string(out), format_system_error(EDOM, "test message"));
 }

 #if FMT_USE_FILE_DESCRIPTORS

 using fmt::buffered_file;
 using fmt::error_code;
 using fmt::file;

 TEST(ErrorCodeTest, Ctor) {
   EXPECT_EQ(error_code().get(), 0);
   EXPECT_EQ(error_code(42).get(), 42);
 }

 TEST(OutputRedirectTest, ScopedRedirect) {
   file read_end, write_end;
   file::pipe(read_end, write_end);
   {
     buffered_file file(write_end.fdopen("w"));
     std::fprintf(file.get(), "[[[");
     {
       OutputRedirect redir(file.get());
       std::fprintf(file.get(), "censored");
     }
     std::fprintf(file.get(), "]]]");
   }
   EXPECT_READ(read_end, "[[[]]]");
 }

 // Test that OutputRedirect handles errors in flush correctly.
 TEST(OutputRedirectTest, FlushErrorInCtor) {
   file read_end, write_end;
   file::pipe(read_end, write_end);
   int write_fd = write_end.descriptor();
   file write_copy = write_end.dup(write_fd);
   buffered_file f = write_end.fdopen("w");
   // Put a character in a file buffer.
   EXPECT_EQ('x', fputc('x', f.get()));
   FMT_POSIX(close(write_fd));
   scoped_ptr<OutputRedirect> redir{FMT_NULL};
   EXPECT_SYSTEM_ERROR_NOASSERT(redir.reset(new OutputRedirect(f.get())),
       EBADF, "cannot flush stream");
   redir.reset(FMT_NULL);
   write_copy.dup2(write_fd);  // "undo" close or dtor will fail
 }

 TEST(OutputRedirectTest, DupErrorInCtor) {
   buffered_file f = open_buffered_file();
   int fd = (f.fileno)();
   file copy = file::dup(fd);
   FMT_POSIX(close(fd));
   scoped_ptr<OutputRedirect> redir{FMT_NULL};
   EXPECT_SYSTEM_ERROR_NOASSERT(redir.reset(new OutputRedirect(f.get())),
       EBADF, fmt::format("cannot duplicate file descriptor {}", fd));
   copy.dup2(fd);  // "undo" close or dtor will fail
 }

 TEST(OutputRedirectTest, RestoreAndRead) {
   file read_end, write_end;
   file::pipe(read_end, write_end);
   buffered_file file(write_end.fdopen("w"));
   std::fprintf(file.get(), "[[[");
   OutputRedirect redir(file.get());
   std::fprintf(file.get(), "censored");
   EXPECT_EQ("censored", sanitize(redir.restore_and_read()));
   EXPECT_EQ("", sanitize(redir.restore_and_read()));
   std::fprintf(file.get(), "]]]");
   file = buffered_file();
   EXPECT_READ(read_end, "[[[]]]");
 }

 // Test that OutputRedirect handles errors in flush correctly.
 TEST(OutputRedirectTest, FlushErrorInRestoreAndRead) {
   file read_end, write_end;
   file::pipe(read_end, write_end);
   int write_fd = write_end.descriptor();
   file write_copy = write_end.dup(write_fd);
   buffered_file f = write_end.fdopen("w");
   OutputRedirect redir(f.get());
   // Put a character in a file buffer.
   EXPECT_EQ('x', fputc('x', f.get()));
   FMT_POSIX(close(write_fd));
   EXPECT_SYSTEM_ERROR_NOASSERT(redir.restore_and_read(),
       EBADF, "cannot flush stream");
   write_copy.dup2(write_fd);  // "undo" close or dtor will fail
 }

 TEST(OutputRedirectTest, ErrorInDtor) {
   file read_end, write_end;
   file::pipe(read_end, write_end);
   int write_fd = write_end.descriptor();
   file write_copy = write_end.dup(write_fd);
   buffered_file f = write_end.fdopen("w");
   scoped_ptr<OutputRedirect> redir(new OutputRedirect(f.get()));
   // Put a character in a file buffer.
   EXPECT_EQ('x', fputc('x', f.get()));
   EXPECT_WRITE(stderr, {
       // The close function must be called inside EXPECT_WRITE, otherwise
       // the system may recycle closed file descriptor when redirecting the
       // output in EXPECT_STDERR and the second close will break output
       // redirection.
       FMT_POSIX(close(write_fd));
       SUPPRESS_ASSERT(redir.reset(FMT_NULL));
   }, format_system_error(EBADF, "cannot flush stream"));
   write_copy.dup2(write_fd); // "undo" close or dtor of buffered_file will fail
 }

 #endif  // FMT_USE_FILE_DESCRIPTORS

 }  // namespace
	// Formatting library for C++ - tests of custom Google Test assertions
	//
	// Copyright (c) 2012 - present, Victor Zverovich
	// All rights reserved.
	//
	// For the license information refer to format.h.

	#include "gtest-extra.h"

	#include <cstring>
	#include <algorithm>
	#include <stdexcept>
	#include <gtest/gtest-spi.h>

	#if defined(_WIN32) && !defined(__MINGW32__)
	# include <crtdbg.h> // for _CrtSetReportMode
	#endif // _WIN32

	#include "util.h"

	using testing::internal::scoped_ptr;

	namespace {

	// This is used to suppress coverity warnings about untrusted values.
	std::string sanitize(const std::string &s) {
	std::string result;
	for (std::string::const_iterator i = s.begin(), end = s.end(); i != end; ++i)
	result.push_back(static_cast<char>(*i & 0xff));
	return result;
	}

	// Tests that assertion macros evaluate their arguments exactly once.
	class SingleEvaluationTest : public ::testing::Test {
	protected:
	SingleEvaluationTest() {
	p_ = s_;
	a_ = 0;
	b_ = 0;
	}

	static const char* const s_;
	static const char* p_;

	static int a_;
	static int b_;
	};

	const char* const SingleEvaluationTest::s_ = "01234";
	const char* SingleEvaluationTest::p_;
	int SingleEvaluationTest::a_;
	int SingleEvaluationTest::b_;

	void do_nothing() {}

	void throw_exception() {
	throw std::runtime_error("test");
	}

	void throw_system_error() {
	throw fmt::system_error(EDOM, "test");
	}

	// Tests that when EXPECT_THROW_MSG fails, it evaluates its message argument
	// exactly once.
	TEST_F(SingleEvaluationTest, FailedEXPECT_THROW_MSG) {
	EXPECT_NONFATAL_FAILURE(
	EXPECT_THROW_MSG(throw_exception(), std::exception, p_++), "01234");
	EXPECT_EQ(s_ + 1, p_);
	}

	// Tests that when EXPECT_SYSTEM_ERROR fails, it evaluates its message argument
	// exactly once.
	TEST_F(SingleEvaluationTest, FailedEXPECT_SYSTEM_ERROR) {
	EXPECT_NONFATAL_FAILURE(
	EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, p_++), "01234");
	EXPECT_EQ(s_ + 1, p_);
	}

	// Tests that when EXPECT_WRITE fails, it evaluates its message argument
	// exactly once.
	TEST_F(SingleEvaluationTest, FailedEXPECT_WRITE) {
	EXPECT_NONFATAL_FAILURE(
	EXPECT_WRITE(stdout, std::printf("test"), p_++), "01234");
	EXPECT_EQ(s_ + 1, p_);
	}

	// Tests that assertion arguments are evaluated exactly once.
	TEST_F(SingleEvaluationTest, ExceptionTests) {
	// successful EXPECT_THROW_MSG
	EXPECT_THROW_MSG({ // NOLINT
	a_++;
	throw_exception();
	}, std::exception, (b_++, "test"));
	EXPECT_EQ(1, a_);
	EXPECT_EQ(1, b_);

	// failed EXPECT_THROW_MSG, throws different type
	EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG({ // NOLINT
	a_++;
	throw_exception();
	}, std::logic_error, (b_++, "test")), "throws a different type");
	EXPECT_EQ(2, a_);
	EXPECT_EQ(2, b_);

	// failed EXPECT_THROW_MSG, throws an exception with different message
	EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG({ // NOLINT
	a_++;
	throw_exception();
	}, std::exception, (b_++, "other")),
	"throws an exception with a different message");
	EXPECT_EQ(3, a_);
	EXPECT_EQ(3, b_);

	// failed EXPECT_THROW_MSG, throws nothing
	EXPECT_NONFATAL_FAILURE(
	EXPECT_THROW_MSG(a_++, std::exception, (b_++, "test")), "throws nothing");
	EXPECT_EQ(4, a_);
	EXPECT_EQ(4, b_);
	}

	TEST_F(SingleEvaluationTest, SystemErrorTests) {
	// successful EXPECT_SYSTEM_ERROR
	EXPECT_SYSTEM_ERROR({ // NOLINT
	a_++;
	throw_system_error();
	}, EDOM, (b_++, "test"));
	EXPECT_EQ(1, a_);
	EXPECT_EQ(1, b_);

	// failed EXPECT_SYSTEM_ERROR, throws different type
	EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR({ // NOLINT
	a_++;
	throw_exception();
	}, EDOM, (b_++, "test")), "throws a different type");
	EXPECT_EQ(2, a_);
	EXPECT_EQ(2, b_);

	// failed EXPECT_SYSTEM_ERROR, throws an exception with different message
	EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR({ // NOLINT
	a_++;
	throw_system_error();
	}, EDOM, (b_++, "other")),
	"throws an exception with a different message");
	EXPECT_EQ(3, a_);
	EXPECT_EQ(3, b_);

	// failed EXPECT_SYSTEM_ERROR, throws nothing
	EXPECT_NONFATAL_FAILURE(
	EXPECT_SYSTEM_ERROR(a_++, EDOM, (b_++, "test")), "throws nothing");
	EXPECT_EQ(4, a_);
	EXPECT_EQ(4, b_);
	}

	// Tests that assertion arguments are evaluated exactly once.
	TEST_F(SingleEvaluationTest, WriteTests) {
	// successful EXPECT_WRITE
	EXPECT_WRITE(stdout, { // NOLINT
	a_++;
	std::printf("test");
	}, (b_++, "test"));
	EXPECT_EQ(1, a_);
	EXPECT_EQ(1, b_);

	// failed EXPECT_WRITE
	EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, { // NOLINT
	a_++;
	std::printf("test");
	}, (b_++, "other")), "Actual: test");
	EXPECT_EQ(2, a_);
	EXPECT_EQ(2, b_);
	}

	// Tests that the compiler will not complain about unreachable code in the
	// EXPECT_THROW_MSG macro.
	TEST(ExpectThrowTest, DoesNotGenerateUnreachableCodeWarning) {
	int n = 0;
	using std::runtime_error;
	EXPECT_THROW_MSG(throw runtime_error(""), runtime_error, "");
	EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(n++, runtime_error, ""), "");
	EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(throw 1, runtime_error, ""), "");
	EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(
	throw runtime_error("a"), runtime_error, "b"), "");
	}

	// Tests that the compiler will not complain about unreachable code in the
	// EXPECT_SYSTEM_ERROR macro.
	TEST(ExpectSystemErrorTest, DoesNotGenerateUnreachableCodeWarning) {
	int n = 0;
	EXPECT_SYSTEM_ERROR(throw fmt::system_error(EDOM, "test"), EDOM, "test");
	EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(n++, EDOM, ""), "");
	EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(throw 1, EDOM, ""), "");
	EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(
	throw fmt::system_error(EDOM, "aaa"), EDOM, "bbb"), "");
	}

	TEST(AssertionSyntaxTest, ExceptionAssertionBehavesLikeSingleStatement) {
	if (::testing::internal::AlwaysFalse())
	EXPECT_THROW_MSG(do_nothing(), std::exception, "");

	if (::testing::internal::AlwaysTrue())
	EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
	else
	do_nothing();
	}

	TEST(AssertionSyntaxTest, SystemErrorAssertionBehavesLikeSingleStatement) {
	if (::testing::internal::AlwaysFalse())
	EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "");

	if (::testing::internal::AlwaysTrue())
	EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
	else
	do_nothing();
	}

	TEST(AssertionSyntaxTest, WriteAssertionBehavesLikeSingleStatement) {
	if (::testing::internal::AlwaysFalse())
	EXPECT_WRITE(stdout, std::printf("x"), "x");

	if (::testing::internal::AlwaysTrue())
	EXPECT_WRITE(stdout, std::printf("x"), "x");
	else
	do_nothing();
	}

	// Tests EXPECT_THROW_MSG.
	TEST(ExpectTest, EXPECT_THROW_MSG) {
	EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
	EXPECT_NONFATAL_FAILURE(
	EXPECT_THROW_MSG(throw_exception(), std::logic_error, "test"),
	"Expected: throw_exception() throws an exception of "
	"type std::logic_error.\n Actual: it throws a different type.");
	EXPECT_NONFATAL_FAILURE(
	EXPECT_THROW_MSG(do_nothing(), std::exception, "test"),
	"Expected: do_nothing() throws an exception of type std::exception.\n"
	" Actual: it throws nothing.");
	EXPECT_NONFATAL_FAILURE(
	EXPECT_THROW_MSG(throw_exception(), std::exception, "other"),
	"throw_exception() throws an exception with a different message.\n"
	"Expected: other\n"
	" Actual: test");
	}

	// Tests EXPECT_SYSTEM_ERROR.
	TEST(ExpectTest, EXPECT_SYSTEM_ERROR) {
	EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
	EXPECT_NONFATAL_FAILURE(
	EXPECT_SYSTEM_ERROR(throw_exception(), EDOM, "test"),
	"Expected: throw_exception() throws an exception of "
	"type fmt::system_error.\n Actual: it throws a different type.");
	EXPECT_NONFATAL_FAILURE(
	EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "test"),
	"Expected: do_nothing() throws an exception of type fmt::system_error.\n"
	" Actual: it throws nothing.");
	EXPECT_NONFATAL_FAILURE(
	EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other"),
	fmt::format(
	"throw_system_error() throws an exception with a different message.\n"
	"Expected: {}\n"
	" Actual: {}",
	format_system_error(EDOM, "other"),
	format_system_error(EDOM, "test")));
	}

	// Tests EXPECT_WRITE.
	TEST(ExpectTest, EXPECT_WRITE) {
	EXPECT_WRITE(stdout, do_nothing(), "");
	EXPECT_WRITE(stdout, std::printf("test"), "test");
	EXPECT_WRITE(stderr, std::fprintf(stderr, "test"), "test");
	EXPECT_NONFATAL_FAILURE(
	EXPECT_WRITE(stdout, std::printf("that"), "this"),
	"Expected: this\n"
	" Actual: that");
	}

	TEST(StreamingAssertionsTest, EXPECT_THROW_MSG) {
	EXPECT_THROW_MSG(throw_exception(), std::exception, "test")
	<< "unexpected failure";
	EXPECT_NONFATAL_FAILURE(
	EXPECT_THROW_MSG(throw_exception(), std::exception, "other")
	<< "expected failure", "expected failure");
	}

	TEST(StreamingAssertionsTest, EXPECT_SYSTEM_ERROR) {
	EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test")
	<< "unexpected failure";
	EXPECT_NONFATAL_FAILURE(
	EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other")
	<< "expected failure", "expected failure");
	}

	TEST(StreamingAssertionsTest, EXPECT_WRITE) {
	EXPECT_WRITE(stdout, std::printf("test"), "test")
	<< "unexpected failure";
	EXPECT_NONFATAL_FAILURE(
	EXPECT_WRITE(stdout, std::printf("test"), "other")
	<< "expected failure", "expected failure");
	}

	TEST(UtilTest, FormatSystemError) {
	fmt::memory_buffer out;
	fmt::format_system_error(out, EDOM, "test message");
	EXPECT_EQ(to_string(out), format_system_error(EDOM, "test message"));
	}

	#if FMT_USE_FILE_DESCRIPTORS

	using fmt::buffered_file;
	using fmt::error_code;
	using fmt::file;

	TEST(ErrorCodeTest, Ctor) {
	EXPECT_EQ(error_code().get(), 0);
	EXPECT_EQ(error_code(42).get(), 42);
	}

	TEST(OutputRedirectTest, ScopedRedirect) {
	file read_end, write_end;
	file::pipe(read_end, write_end);
	{
	buffered_file file(write_end.fdopen("w"));
	std::fprintf(file.get(), "[[[");
	{
	OutputRedirect redir(file.get());
	std::fprintf(file.get(), "censored");
	}
	std::fprintf(file.get(), "]]]");
	}
	EXPECT_READ(read_end, "[[[]]]");
	}

	// Test that OutputRedirect handles errors in flush correctly.
	TEST(OutputRedirectTest, FlushErrorInCtor) {
	file read_end, write_end;
	file::pipe(read_end, write_end);
	int write_fd = write_end.descriptor();
	file write_copy = write_end.dup(write_fd);
	buffered_file f = write_end.fdopen("w");
	// Put a character in a file buffer.
	EXPECT_EQ('x', fputc('x', f.get()));
	FMT_POSIX(close(write_fd));
	scoped_ptr<OutputRedirect> redir{FMT_NULL};
	EXPECT_SYSTEM_ERROR_NOASSERT(redir.reset(new OutputRedirect(f.get())),
	EBADF, "cannot flush stream");
	redir.reset(FMT_NULL);
	write_copy.dup2(write_fd); // "undo" close or dtor will fail
	}

	TEST(OutputRedirectTest, DupErrorInCtor) {
	buffered_file f = open_buffered_file();
	int fd = (f.fileno)();
	file copy = file::dup(fd);
	FMT_POSIX(close(fd));
	scoped_ptr<OutputRedirect> redir{FMT_NULL};
	EXPECT_SYSTEM_ERROR_NOASSERT(redir.reset(new OutputRedirect(f.get())),
	EBADF, fmt::format("cannot duplicate file descriptor {}", fd));
	copy.dup2(fd); // "undo" close or dtor will fail
	}

	TEST(OutputRedirectTest, RestoreAndRead) {
	file read_end, write_end;
	file::pipe(read_end, write_end);
	buffered_file file(write_end.fdopen("w"));
	std::fprintf(file.get(), "[[[");
	OutputRedirect redir(file.get());
	std::fprintf(file.get(), "censored");
	EXPECT_EQ("censored", sanitize(redir.restore_and_read()));
	EXPECT_EQ("", sanitize(redir.restore_and_read()));
	std::fprintf(file.get(), "]]]");
	file = buffered_file();
	EXPECT_READ(read_end, "[[[]]]");
	}

	// Test that OutputRedirect handles errors in flush correctly.
	TEST(OutputRedirectTest, FlushErrorInRestoreAndRead) {
	file read_end, write_end;
	file::pipe(read_end, write_end);
	int write_fd = write_end.descriptor();
	file write_copy = write_end.dup(write_fd);
	buffered_file f = write_end.fdopen("w");
	OutputRedirect redir(f.get());
	// Put a character in a file buffer.
	EXPECT_EQ('x', fputc('x', f.get()));
	FMT_POSIX(close(write_fd));
	EXPECT_SYSTEM_ERROR_NOASSERT(redir.restore_and_read(),
	EBADF, "cannot flush stream");
	write_copy.dup2(write_fd); // "undo" close or dtor will fail
	}

	TEST(OutputRedirectTest, ErrorInDtor) {
	file read_end, write_end;
	file::pipe(read_end, write_end);
	int write_fd = write_end.descriptor();
	file write_copy = write_end.dup(write_fd);
	buffered_file f = write_end.fdopen("w");
	scoped_ptr<OutputRedirect> redir(new OutputRedirect(f.get()));
	// Put a character in a file buffer.
	EXPECT_EQ('x', fputc('x', f.get()));
	EXPECT_WRITE(stderr, {
	// The close function must be called inside EXPECT_WRITE, otherwise
	// the system may recycle closed file descriptor when redirecting the
	// output in EXPECT_STDERR and the second close will break output
	// redirection.
	FMT_POSIX(close(write_fd));
	SUPPRESS_ASSERT(redir.reset(FMT_NULL));
	}, format_system_error(EBADF, "cannot flush stream"));
	write_copy.dup2(write_fd); // "undo" close or dtor of buffered_file will fail
	}

	#endif // FMT_USE_FILE_DESCRIPTORS

	} // namespace