content/browser/power_monitor_message_broadcaster_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/test/power_monitor_test_base.h"
   6 #include "content/browser/power_monitor_message_broadcaster.h"
   7 #include "content/common/power_monitor_messages.h"
   8 #include "ipc/ipc_sender.h"
   9 #include "testing/gtest/include/gtest/gtest.h"
  10
  11 namespace content {
  12
  13 class PowerMonitorMessageSender : public IPC::Sender {
  14  public:
  15   PowerMonitorMessageSender()
  16       : power_state_changes_(0),
  17         suspends_(0),
  18         resumes_(0) {
  19   }
  20   ~PowerMonitorMessageSender() override {}
  21
  22   bool Send(IPC::Message* msg) override {
  23     switch (msg->type()) {
  24       case PowerMonitorMsg_Suspend::ID:
  25         suspends_++;
  26         break;
  27       case PowerMonitorMsg_Resume::ID:
  28         resumes_++;
  29         break;
  30       case PowerMonitorMsg_PowerStateChange::ID:
  31         power_state_changes_++;
  32         break;
  33     }
  34     delete msg;
  35     return true;
  36   };
  37
  38   // Test status counts.
  39   int power_state_changes() { return power_state_changes_; }
  40   int suspends() { return suspends_; }
  41   int resumes() { return resumes_; }
  42
  43  private:
  44   int power_state_changes_;  // Count of OnPowerStateChange notifications.
  45   int suspends_;  // Count of OnSuspend notifications.
  46   int resumes_;  // Count of OnResume notifications.
  47 };
  48
  49 class PowerMonitorMessageBroadcasterTest : public testing::Test {
  50  protected:
  51   PowerMonitorMessageBroadcasterTest() {
  52     power_monitor_source_ = new base::PowerMonitorTestSource();
  53     power_monitor_.reset(new base::PowerMonitor(
  54         scoped_ptr<base::PowerMonitorSource>(power_monitor_source_)));
  55   }
  56   ~PowerMonitorMessageBroadcasterTest() override {}
  57
  58   base::PowerMonitorTestSource* source() { return power_monitor_source_; }
  59   base::PowerMonitor* monitor() { return power_monitor_.get(); }
  60
  61  private:
  62   base::PowerMonitorTestSource* power_monitor_source_;
  63   scoped_ptr<base::PowerMonitor> power_monitor_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(PowerMonitorMessageBroadcasterTest);
  66 };
  67
  68 TEST_F(PowerMonitorMessageBroadcasterTest, PowerMessageBroadcast) {
  69   PowerMonitorMessageSender sender;
  70   PowerMonitorMessageBroadcaster broadcaster(&sender);
  71
  72   // Calling Init should invoke a power state change.
  73   broadcaster.Init();
  74   EXPECT_EQ(sender.power_state_changes(), 1);
  75
  76   // Sending resume when not suspended should have no effect.
  77   source()->GenerateResumeEvent();
  78   EXPECT_EQ(sender.resumes(), 0);
  79
  80   // Pretend we suspended.
  81   source()->GenerateSuspendEvent();
  82   EXPECT_EQ(sender.suspends(), 1);
  83
  84   // Send a second suspend notification.  This should be suppressed.
  85   source()->GenerateSuspendEvent();
  86   EXPECT_EQ(sender.suspends(), 1);
  87
  88   // Pretend we were awakened.
  89   source()->GenerateResumeEvent();
  90   EXPECT_EQ(sender.resumes(), 1);
  91
  92   // Send a duplicate resume notification.  This should be suppressed.
  93   source()->GenerateResumeEvent();
  94   EXPECT_EQ(sender.resumes(), 1);
  95
  96   // Pretend the device has gone on battery power
  97   source()->GeneratePowerStateEvent(true);
  98   EXPECT_EQ(sender.power_state_changes(), 2);
  99
 100   // Repeated indications the device is on battery power should be suppressed.
 101   source()->GeneratePowerStateEvent(true);
 102   EXPECT_EQ(sender.power_state_changes(), 2);
 103
 104   // Pretend the device has gone off battery power
 105   source()->GeneratePowerStateEvent(false);
 106   EXPECT_EQ(sender.power_state_changes(), 3);
 107
 108   // Repeated indications the device is off battery power should be suppressed.
 109   source()->GeneratePowerStateEvent(false);
 110   EXPECT_EQ(sender.power_state_changes(), 3);
 111 }
 112
 113 }  // namespace base