base/power_monitor/power_monitor_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/power_monitor/power_monitor.h"
   6 #include "base/test/power_monitor_test_base.h"
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace base {
  10
  11 class PowerMonitorTest : public testing::Test {
  12  protected:
  13   PowerMonitorTest() {
  14     power_monitor_source_ = new PowerMonitorTestSource();
  15     power_monitor_.reset(new PowerMonitor(
  16         scoped_ptr<PowerMonitorSource>(power_monitor_source_)));
  17   }
  18   virtual ~PowerMonitorTest() {};
  19
  20   PowerMonitorTestSource* source() { return power_monitor_source_; }
  21   PowerMonitor* monitor() { return power_monitor_.get(); }
  22
  23  private:
  24   PowerMonitorTestSource* power_monitor_source_;
  25   scoped_ptr<PowerMonitor> power_monitor_;
  26
  27   DISALLOW_COPY_AND_ASSIGN(PowerMonitorTest);
  28 };
  29
  30 // PowerMonitorSource is tightly coupled with the PowerMonitor, so this test
  31 // Will cover both classes
  32 TEST_F(PowerMonitorTest, PowerNotifications) {
  33   const int kObservers = 5;
  34
  35   PowerMonitorTestObserver observers[kObservers];
  36   for (int index = 0; index < kObservers; ++index)
  37     monitor()->AddObserver(&observers[index]);
  38
  39   // Sending resume when not suspended should have no effect.
  40   source()->GenerateResumeEvent();
  41   EXPECT_EQ(observers[0].resumes(), 0);
  42
  43   // Pretend we suspended.
  44   source()->GenerateSuspendEvent();
  45   // Ensure all observers were notified of the event
  46   for (int index = 0; index < kObservers; ++index)
  47     EXPECT_EQ(observers[index].suspends(), 1);
  48
  49   // Send a second suspend notification.  This should be suppressed.
  50   source()->GenerateSuspendEvent();
  51   EXPECT_EQ(observers[0].suspends(), 1);
  52
  53   // Pretend we were awakened.
  54   source()->GenerateResumeEvent();
  55   EXPECT_EQ(observers[0].resumes(), 1);
  56
  57   // Send a duplicate resume notification.  This should be suppressed.
  58   source()->GenerateResumeEvent();
  59   EXPECT_EQ(observers[0].resumes(), 1);
  60
  61   // Pretend the device has gone on battery power
  62   source()->GeneratePowerStateEvent(true);
  63   EXPECT_EQ(observers[0].power_state_changes(), 1);
  64   EXPECT_EQ(observers[0].last_power_state(), true);
  65
  66   // Repeated indications the device is on battery power should be suppressed.
  67   source()->GeneratePowerStateEvent(true);
  68   EXPECT_EQ(observers[0].power_state_changes(), 1);
  69
  70   // Pretend the device has gone off battery power
  71   source()->GeneratePowerStateEvent(false);
  72   EXPECT_EQ(observers[0].power_state_changes(), 2);
  73   EXPECT_EQ(observers[0].last_power_state(), false);
  74
  75   // Repeated indications the device is off battery power should be suppressed.
  76   source()->GeneratePowerStateEvent(false);
  77   EXPECT_EQ(observers[0].power_state_changes(), 2);
  78 }
  79
  80 }  // namespace base