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// Copyright (c) 2010 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 CHROME_TEST_THREAD_TEST_HELPER_H_
#define CHROME_TEST_THREAD_TEST_HELPER_H_
#pragma once
#include "base/ref_counted.h"
#include "base/waitable_event.h"
#include "chrome/browser/browser_thread.h"
// Helper class that executes code on a given thread while blocking on the
// invoking thread (normally the UI thread). To use, derive from this class and
// overwrite RunTest. An alternative use of this class is to use it directly.
// It will then block until all pending tasks on a given thread have been
// executed.
class ThreadTestHelper : public base::RefCountedThreadSafe<ThreadTestHelper> {
public:
explicit ThreadTestHelper(BrowserThread::ID thread_id)
: test_result_(false),
thread_id_(thread_id),
done_event_(false, false) {
}
// True if RunTest() was successfully executed on the target thread.
bool Run() WARN_UNUSED_RESULT {
if (!BrowserThread::PostTask(thread_id_, FROM_HERE, NewRunnableMethod(
this, &ThreadTestHelper::RunInThread))) {
return false;
}
done_event_.Wait();
return test_result_;
}
virtual void RunTest() { set_test_result(true); }
protected:
friend class base::RefCountedThreadSafe<ThreadTestHelper>;
virtual ~ThreadTestHelper() {}
// Use this method to store the result of RunTest().
void set_test_result(bool test_result) { test_result_ = test_result; }
private:
void RunInThread() {
RunTest();
done_event_.Signal();
}
bool test_result_;
BrowserThread::ID thread_id_;
base::WaitableEvent done_event_;
DISALLOW_COPY_AND_ASSIGN(ThreadTestHelper);
};
#endif // CHROME_TEST_THREAD_TEST_HELPER_H_
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