Add ScopedTaskSuspend and its test

util/posix/scoped_fcntl_flags_test.cc

Index: util/posix/scoped_fcntl_flags_test.cc
diff --git a/util/posix/scoped_fcntl_flags_test.cc b/util/posix/scoped_fcntl_flags_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..80b0fd9792c2b20125161373a926dbe472657278
--- /dev/null
+++ b/util/posix/scoped_fcntl_flags_test.cc
@@ -0,0 +1,65 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "util/posix/scoped_fcntl_flags.h"
+
+#include <fcntl.h>
+#include <paths.h>
+
+#include "base/files/scoped_file.h"
+#include "base/logging.h"
+#include "base/posix/eintr_wrapper.h"
+#include "gtest/gtest.h"
+#include "util/test/errors.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+// Returns the value of the file descriptor |fd|’s status flags as
+// fcntl(fd, F_GETFL) does. On error, terminates execution.
+int FcntlFlags(int fd) {
+  int rv = fcntl(fd, F_GETFL, 0);
+  PCHECK(rv != -1) << "fcntl";

[Robert Sesek, 2014/10/13 19:09:39]

Use EXPECT_ instead so you don't crash the test?

+
+  return rv;
+}
+
+TEST(ScopedFcntlFlags, ScopedFcntlFlags) {
+  int fd = HANDLE_EINTR(open(_PATH_DEVNULL, O_RDWR));
+  ASSERT_GE(fd, 0) << ErrnoMessage("open");
+
+  base::ScopedFD fd_owner(fd);
+
+  int flags = FcntlFlags(fd);
+  EXPECT_EQ(O_RDWR, flags);
+
+  {
+    ScopedFcntlFlags fcntl_flags(fd, O_NONBLOCK, 0);
+    EXPECT_EQ(O_RDWR | O_NONBLOCK, FcntlFlags(fd));
+
+    {
+      ScopedFcntlFlags fcntl_flags(fd, 0, O_NONBLOCK);
+      EXPECT_EQ(O_RDWR, FcntlFlags(fd));
+    }
+
+    EXPECT_EQ(O_RDWR | O_NONBLOCK, FcntlFlags(fd));
+  }
+
+  EXPECT_EQ(O_RDWR, flags);
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad