139 lines
5.2 KiB
C++
139 lines
5.2 KiB
C++
/*
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Custom Google Test assertions.
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Copyright (c) 2012-2014, Victor Zverovich
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FMT_GTEST_EXTRA_H
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#define FMT_GTEST_EXTRA_H
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#include <string>
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#include <gtest/gtest.h>
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#include "format.h"
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#ifndef FMT_USE_FILE_DESCRIPTORS
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# define FMT_USE_FILE_DESCRIPTORS 0
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#endif
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#if FMT_USE_FILE_DESCRIPTORS
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# include "posix.h"
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#endif
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#define FMT_TEST_THROW_(statement, expected_exception, expected_message, fail) \
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GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
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if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
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std::string gtest_expected_message = expected_message; \
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bool gtest_caught_expected = false; \
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try { \
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GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
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} \
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catch (expected_exception const& e) { \
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if (gtest_expected_message != e.what()) { \
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gtest_ar \
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<< #statement " throws an exception with a different message.\n" \
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<< "Expected: " << gtest_expected_message << "\n" \
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<< " Actual: " << e.what(); \
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goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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} \
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gtest_caught_expected = true; \
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} \
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catch (...) { \
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gtest_ar << \
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"Expected: " #statement " throws an exception of type " \
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#expected_exception ".\n Actual: it throws a different type."; \
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goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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} \
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if (!gtest_caught_expected) { \
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gtest_ar << \
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"Expected: " #statement " throws an exception of type " \
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#expected_exception ".\n Actual: it throws nothing."; \
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goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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} \
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} else \
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GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__): \
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fail(gtest_ar.failure_message())
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// Tests that the statement throws the expected exception and the exception's
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// what() method returns expected message.
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#define EXPECT_THROW_MSG(statement, expected_exception, expected_message) \
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FMT_TEST_THROW_(statement, expected_exception, \
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expected_message, GTEST_NONFATAL_FAILURE_)
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std::string format_system_error(int error_code, fmt::StringRef message);
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#define EXPECT_SYSTEM_ERROR(statement, error_code, message) \
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EXPECT_THROW_MSG(statement, fmt::SystemError, \
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format_system_error(error_code, message))
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#if FMT_USE_FILE_DESCRIPTORS
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// Captures file output by redirecting it to a pipe.
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// The output it can handle is limited by the pipe capacity.
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class OutputRedirect {
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private:
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FILE *file_;
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fmt::File original_; // Original file passed to redirector.
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fmt::File read_end_; // Read end of the pipe where the output is redirected.
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GTEST_DISALLOW_COPY_AND_ASSIGN_(OutputRedirect);
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void Flush();
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void Restore();
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public:
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explicit OutputRedirect(FILE *file);
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~OutputRedirect() FMT_NOEXCEPT(true);
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// Restores the original file, reads output from the pipe into a string
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// and returns it.
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std::string RestoreAndRead();
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};
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#define FMT_TEST_WRITE_(statement, expected_output, file, fail) \
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GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
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if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
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std::string gtest_expected_output = expected_output; \
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OutputRedirect gtest_redir(file); \
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GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
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std::string gtest_output = gtest_redir.RestoreAndRead(); \
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if (gtest_output != gtest_expected_output) { \
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gtest_ar \
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<< #statement " produces different output.\n" \
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<< "Expected: " << gtest_expected_output << "\n" \
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<< " Actual: " << gtest_output; \
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goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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} \
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} else \
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GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__): \
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fail(gtest_ar.failure_message())
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// Tests that the statement writes the expected output to file.
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#define EXPECT_WRITE(file, statement, expected_output) \
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FMT_TEST_WRITE_(statement, expected_output, file, GTEST_NONFATAL_FAILURE_)
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#endif // FMT_USE_FILE_DESCRIPTORS
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#endif // FMT_GTEST_EXTRA_H
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