Move scoped_test_dir.* and test_io_thread.* from edk/test to edk/system/test.
R=vardhan@google.com
Review URL: https://codereview.chromium.org/1427633003 .
diff --git a/mojo/edk/system/test/test_io_thread.h b/mojo/edk/system/test/test_io_thread.h
new file mode 100644
index 0000000..8b0d6e3
--- /dev/null
+++ b/mojo/edk/system/test/test_io_thread.h
@@ -0,0 +1,57 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_EDK_SYSTEM_TEST_TEST_IO_THREAD_H_
+#define MOJO_EDK_SYSTEM_TEST_TEST_IO_THREAD_H_
+
+#include "base/callback_forward.h"
+#include "base/memory/ref_counted.h"
+#include "base/task_runner.h"
+#include "base/threading/thread.h"
+#include "mojo/public/cpp/system/macros.h"
+
+namespace mojo {
+namespace system {
+namespace test {
+
+// Class to help create/run threads with I/O |MessageLoop|s in tests.
+class TestIOThread {
+ public:
+ enum class StartMode { AUTO, MANUAL };
+ explicit TestIOThread(StartMode start_mode);
+ // Stops the I/O thread if necessary.
+ ~TestIOThread();
+
+ // |Start()|/|Stop()| should only be called from the main (creation) thread.
+ // After |Stop()|, |Start()| may be called again to start a new I/O thread.
+ // |Stop()| may be called even when the I/O thread is not started.
+ void Start();
+ void Stop();
+
+ // Post |task| to the IO thread.
+ void PostTask(const base::Closure& task);
+ // Posts |task| to the IO-thread with an WaitableEvent associated blocks on
+ // it until the posted |task| is executed, then returns.
+ void PostTaskAndWait(const base::Closure& task);
+
+ base::MessageLoopForIO* message_loop() {
+ return static_cast<base::MessageLoopForIO*>(io_thread_.message_loop());
+ }
+
+ scoped_refptr<base::SingleThreadTaskRunner> task_runner() {
+ return message_loop()->task_runner();
+ }
+
+ private:
+ base::Thread io_thread_;
+ bool io_thread_started_;
+
+ MOJO_DISALLOW_COPY_AND_ASSIGN(TestIOThread);
+};
+
+} // namespace test
+} // namespace system
+} // namespace mojo
+
+#endif // MOJO_EDK_SYSTEM_TEST_TEST_IO_THREAD_H_
