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// 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 CHROME_BROWSER_SYNC_TEST_INTEGRATION_STATUS_CHANGE_CHECKER_H_
#define CHROME_BROWSER_SYNC_TEST_INTEGRATION_STATUS_CHANGE_CHECKER_H_
#include <string>
#include "base/time/time.h"
class ProfileSyncServiceHarness;
// Interface for a helper class that can pump the message loop while waiting
// for a certain state transition to take place.
//
// This is a template that should be filled in by child classes so they can
// observe specific kinds of changes and await specific conditions.
//
// The instances of this class are intended to be single-use. It doesn't make
// sense to call StartBlockingWait() more than once.
class StatusChangeChecker {
public:
explicit StatusChangeChecker();
// Returns a string representing this current StatusChangeChecker, and
// possibly some small part of its state. For example: "AwaitPassphraseError"
// or "AwaitMigrationDone(BOOKMARKS)".
virtual std::string GetDebugMessage() const = 0;
// Returns true if the blocking wait was exited because of a timeout.
bool TimedOut() const;
virtual bool IsExitConditionSatisfied() = 0;
protected:
virtual ~StatusChangeChecker();
// Timeout length when blocking.
virtual base::TimeDelta GetTimeoutDuration();
// Helper function to start running the nested message loop.
//
// Will exit if IsExitConditionSatisfied() returns true when called from
// CheckExitCondition(), if a timeout occurs, or if StopWaiting() is called.
//
// The timeout length is specified with GetTimeoutDuration().
void StartBlockingWait();
// Stop the nested running of the message loop started in StartBlockingWait().
void StopWaiting();
// Checks IsExitConditionSatisfied() and calls StopWaiting() if it returns
// true.
void CheckExitCondition();
// Called when the blocking wait timeout is exceeded.
void OnTimeout();
bool timed_out_;
};
#endif // CHROME_BROWSER_SYNC_TEST_INTEGRATION_STATUS_CHANGE_CHECKER_H_
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