chrome/test/remoting/waiter.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_TEST_REMOTING_WAITER_H_
   6 #define CHROME_TEST_REMOTING_WAITER_H_
   7
   8 #include "base/timer/timer.h"
   9
  10 namespace content {
  11 class MessageLoopRunner;
  12 }
  13
  14 namespace remoting {
  15
  16 // Block the execution of the test code for the specified number of
  17 // milliseconds while keeping the message loop running. The browser instance
  18 // will be responsive during the wait and test actions initiated before
  19 // the wait will keep running.
  20 class TimeoutWaiter {
  21  public:
  22   explicit TimeoutWaiter(base::TimeDelta timeout);
  23   virtual ~TimeoutWaiter();
  24
  25   // Returns true in case of success.
  26   // For TimeoutWaiter it should always be true.
  27   virtual bool Wait();
  28
  29  protected:
  30   virtual void CancelWait();
  31
  32  private:
  33   // Callback used to cancel the TimeoutWaiter::Wait.
  34   void CancelWaitCallback();
  35
  36   base::OneShotTimer<TimeoutWaiter> timeout_timer_;
  37   base::TimeDelta timeout_;
  38   scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
  39
  40   DISALLOW_COPY_AND_ASSIGN(TimeoutWaiter);
  41 };
  42
  43 // With a message loop running, keep calling callback in the specified
  44 // interval until true is returned.
  45 class ConditionalTimeoutWaiter : public TimeoutWaiter {
  46  public:
  47   typedef base::Callback<bool(void)> Predicate;
  48
  49   ConditionalTimeoutWaiter(base::TimeDelta timeout,
  50                            base::TimeDelta interval,
  51                            const Predicate& callback);
  52   ~ConditionalTimeoutWaiter() override;
  53
  54   // Returns true if |callback_| returned true and false in case of timeout.
  55   bool Wait() override;
  56
  57  protected:
  58   void CancelWait() override;
  59
  60  private:
  61   // Callback used to cancel the ConditionalTimeoutWaiter::Wait.
  62   void CancelWaitCallback();
  63
  64   base::TimeDelta interval_;
  65   Predicate callback_;
  66   base::RepeatingTimer<ConditionalTimeoutWaiter> condition_timer_;
  67   bool success_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(ConditionalTimeoutWaiter);
  70 };
  71
  72 }  // namespace remoting
  73
  74 #endif  // CHROME_TEST_REMOTING_WAITER_H_