content/child/blink_platform_unittest.cc

   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 #include "base/run_loop.h"
   6 #include "base/time/time.h"
   7 #include "content/child/blink_platform_impl.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace content {
  11
  12 // Derives BlinkPlatformImpl for testing shared timers.
  13 class TestBlinkPlatformImpl : public BlinkPlatformImpl {
  14  public:
  15   TestBlinkPlatformImpl() : mock_monotonically_increasing_time_(0) {}
  16
  17   // Returns mock time when enabled.
  18   virtual double monotonicallyIncreasingTime() OVERRIDE {
  19     if (mock_monotonically_increasing_time_ > 0.0)
  20       return mock_monotonically_increasing_time_;
  21     return BlinkPlatformImpl::monotonicallyIncreasingTime();
  22   }
  23
  24   virtual void OnStartSharedTimer(base::TimeDelta delay) OVERRIDE {
  25     shared_timer_delay_ = delay;
  26   }
  27
  28   base::TimeDelta shared_timer_delay() { return shared_timer_delay_; }
  29
  30   void set_mock_monotonically_increasing_time(double mock_time) {
  31     mock_monotonically_increasing_time_ = mock_time;
  32   }
  33
  34  private:
  35   base::TimeDelta shared_timer_delay_;
  36   double mock_monotonically_increasing_time_;
  37
  38   DISALLOW_COPY_AND_ASSIGN(TestBlinkPlatformImpl);
  39 };
  40
  41 TEST(BlinkPlatformTest, SuspendResumeSharedTimer) {
  42   base::MessageLoop message_loop;
  43
  44   TestBlinkPlatformImpl platform_impl;
  45
  46   // Set a timer to fire as soon as possible.
  47   platform_impl.setSharedTimerFireInterval(0);
  48
  49   // Suspend timers immediately so the above timer wouldn't be fired.
  50   platform_impl.SuspendSharedTimer();
  51
  52   // The above timer would have posted a task which can be processed out of the
  53   // message loop.
  54   base::RunLoop().RunUntilIdle();
  55
  56   // Set a mock time after 1 second to simulate timers suspended for 1 second.
  57   double new_time = base::Time::Now().ToDoubleT() + 1;
  58   platform_impl.set_mock_monotonically_increasing_time(new_time);
  59
  60   // Resume timers so that the timer set above will be set again to fire
  61   // immediately.
  62   platform_impl.ResumeSharedTimer();
  63
  64   EXPECT_TRUE(base::TimeDelta() == platform_impl.shared_timer_delay());
  65 }
  66
  67 }  // namespace content