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// Copyright (c) 2013, 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.
// Utility class for creating a temporary file for unit tests
// that is deleted in the destructor. Only supported on Posix systems.
#ifndef GOOGLE_BREAKPAD_COMMON_TESTS_AUTO_TESTFILE
#define GOOGLE_BREAKPAD_COMMON_TESTS_AUTO_TESTFILE
#include <unistd.h>
#include <sys/types.h>
#include <string>
#include "breakpad_googletest_includes.h"
#include "common/tests/auto_tempdir.h"
namespace google_breakpad {
#ifdef _WIN32
#error "This header cannot be used on Windows"
#else
class AutoTestFile {
public:
// Create a new empty test file.
// test_prefix: (input) test-specific prefix, can't be NULL.
explicit AutoTestFile(const char* test_prefix) {
Init(test_prefix);
}
// Create a new test file, and fill it with initial data from a C string.
// The terminating zero is not written.
// test_prefix: (input) test-specific prefix, can't be NULL.
// text: (input) initial content.
AutoTestFile(const char* test_prefix, const char* text) {
Init(test_prefix);
if (fd_ >= 0)
WriteText(text, static_cast<size_t>(strlen(text)));
}
AutoTestFile(const char* test_prefix, const char* text, size_t text_len) {
Init(test_prefix);
if (fd_ >= 0)
WriteText(text, text_len);
}
// Destroy test file on scope exit.
~AutoTestFile() {
if (fd_ >= 0) {
close(fd_);
fd_ = -1;
}
}
// Returns true iff the test file could be created properly.
// Useful in tests inside EXPECT_TRUE(file.IsOk());
bool IsOk() {
return fd_ >= 0;
}
// Returns the Posix file descriptor for the test file, or -1
// If IsOk() returns false. Note: on Windows, this always returns -1.
int GetFd() {
return fd_;
}
private:
void Init(const char* test_prefix) {
fd_ = -1;
char path_templ[PATH_MAX];
int ret = snprintf(path_templ, sizeof(path_templ),
TEMPDIR "/%s-unittest.XXXXXX",
test_prefix);
if (ret >= static_cast<int>(sizeof(path_templ)))
return;
fd_ = mkstemp(path_templ);
if (fd_ < 0)
return;
unlink(path_templ);
}
void WriteText(const char* text, size_t text_len) {
int r = HANDLE_EINTR(write(fd_, text, text_len));
if (r != static_cast<int>(text_len)) {
close(fd_);
fd_ = -1;
return;
}
lseek(fd_, 0, SEEK_SET);
}
int fd_;
};
#endif // !_WIN32
} // namespace google_breakpad
#endif // GOOGLE_BREAKPAD_COMMON_TESTS_AUTO_TESTFILE
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