Add tests.

test/posix-test.cc

@@ -0,0 +1,69 @@
+/*
+ Test wrappers around POSIX functions.
+
+ Copyright (c) 2012-2014, Victor Zverovich
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+    list of conditions and the following disclaimer.
+ 2. 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.
+
+ 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.
+ */
+
+#include "posix-test.h"
+
+#undef open
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include "gtest-extra.h"
+
+namespace {
+int open_count;
+}
+
+#ifndef _WIN32
+int test::open(const char *path, int oflag, int mode) {
+  if ((open_count++ % 3) == 2)
+    return ::open(path, oflag, mode);
+  errno = EINTR;
+  return -1;
+}
+#else
+errno_t test::sopen_s(int* pfh, const char *filename, int oflag, int shflag, int pmode) {
+  return _sopen_s(pfh, filename, oflag, shflag, pmode);
+}
+#endif
+
+#ifndef _WIN32
+# define EXPECT_RETRY(statement, func, message) \
+    func##_count = 0; \
+    statement; \
+    EXPECT_EQ(3, func##_count);
+#else
+# define EXPECT_RETRY(statement, func, message) \
+    EXPECT_SYSTEM_ERROR(statement, EINTR, message);
+#endif
+
+TEST(FileTest, OpenRetry) {
+  EXPECT_RETRY(File file("CMakeLists.txt", File::RDONLY),
+               open, "cannot open file CMakeLists.txt");
+}
+
+// TODO: test retry on EINTR