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// Formatting library for C++ - custom Google Test assertions
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_GTEST_EXTRA_H_
#define FMT_GTEST_EXTRA_H_
#include <stdlib.h> // _invalid_parameter_handler
#include <string>
#include "fmt/os.h"
#include "gmock/gmock.h"
#define FMT_TEST_THROW_(statement, expected_exception, expected_message, fail) \
GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
std::string gtest_expected_message = expected_message; \
bool gtest_caught_expected = false; \
try { \
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
} catch (expected_exception const& e) { \
if (gtest_expected_message != e.what()) { \
gtest_ar << #statement \
" throws an exception with a different message.\n" \
<< "Expected: " << gtest_expected_message << "\n" \
<< " Actual: " << e.what(); \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
gtest_caught_expected = true; \
} catch (...) { \
gtest_ar << "Expected: " #statement \
" throws an exception of type " #expected_exception \
".\n Actual: it throws a different type."; \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
if (!gtest_caught_expected) { \
gtest_ar << "Expected: " #statement \
" throws an exception of type " #expected_exception \
".\n Actual: it throws nothing."; \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
} else \
GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__) \
: fail(gtest_ar.failure_message())
// Tests that the statement throws the expected exception and the exception's
// what() method returns expected message.
#define EXPECT_THROW_MSG(statement, expected_exception, expected_message) \
FMT_TEST_THROW_(statement, expected_exception, expected_message, \
GTEST_NONFATAL_FAILURE_)
inline std::string system_error_message(int error_code,
const std::string& message) {
auto ec = std::error_code(error_code, std::generic_category());
return std::system_error(ec, message).what();
}
#define EXPECT_SYSTEM_ERROR(statement, error_code, message) \
EXPECT_THROW_MSG(statement, std::system_error, \
system_error_message(error_code, message))
#if FMT_USE_FCNTL
// Captures file output by redirecting it to a pipe.
// The output it can handle is limited by the pipe capacity.
class output_redirect {
private:
FILE* file_;
fmt::file original_; // Original file passed to redirector.
fmt::file read_end_; // Read end of the pipe where the output is redirected.
void flush();
void restore();
public:
explicit output_redirect(FILE* file);
~output_redirect() noexcept;
output_redirect(const output_redirect&) = delete;
void operator=(const output_redirect&) = delete;
// Restores the original file, reads output from the pipe into a string
// and returns it.
std::string restore_and_read();
};
# define FMT_TEST_WRITE_(statement, expected_output, file, fail) \
GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
std::string gtest_expected_output = expected_output; \
output_redirect gtest_redir(file); \
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
std::string gtest_output = gtest_redir.restore_and_read(); \
if (gtest_output != gtest_expected_output) { \
gtest_ar << #statement " produces different output.\n" \
<< "Expected: " << gtest_expected_output << "\n" \
<< " Actual: " << gtest_output; \
goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
} \
} else \
GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__) \
: fail(gtest_ar.failure_message())
// Tests that the statement writes the expected output to file.
# define EXPECT_WRITE(file, statement, expected_output) \
FMT_TEST_WRITE_(statement, expected_output, file, GTEST_NONFATAL_FAILURE_)
# ifdef _MSC_VER
// Suppresses Windows assertions on invalid file descriptors, making
// POSIX functions return proper error codes instead of crashing on Windows.
class suppress_assert {
private:
_invalid_parameter_handler original_handler_;
int original_report_mode_;
static void handle_invalid_parameter(const wchar_t*, const wchar_t*,
const wchar_t*, unsigned, uintptr_t) {}
public:
suppress_assert()
: original_handler_(
_set_invalid_parameter_handler(handle_invalid_parameter)),
original_report_mode_(_CrtSetReportMode(_CRT_ASSERT, 0)) {}
~suppress_assert() {
_set_invalid_parameter_handler(original_handler_);
_CrtSetReportMode(_CRT_ASSERT, original_report_mode_);
(void)original_report_mode_;
}
};
# define SUPPRESS_ASSERT(statement) \
{ \
suppress_assert sa; \
statement; \
}
# else
# define SUPPRESS_ASSERT(statement) statement
# endif // _MSC_VER
# define EXPECT_SYSTEM_ERROR_NOASSERT(statement, error_code, message) \
EXPECT_SYSTEM_ERROR(SUPPRESS_ASSERT(statement), error_code, message)
// Attempts to read count characters from a file.
std::string read(fmt::file& f, size_t count);
# define EXPECT_READ(file, expected_content) \
EXPECT_EQ(expected_content, \
read(file, fmt::string_view(expected_content).size()))
#else
# define EXPECT_WRITE(file, statement, expected_output) \
do { \
(void)(file); \
(void)(statement); \
(void)(expected_output); \
SUCCEED(); \
} while (false)
#endif // FMT_USE_FCNTL
#endif // FMT_GTEST_EXTRA_H_
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