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| 1 // Copyright 2014 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 "content/browser/power_usage_monitor_impl.h" |
| 6 |
| 7 #include "testing/gtest/include/gtest/gtest.h" |
| 8 |
| 9 namespace content { |
| 10 |
| 11 class SystemInterfaceForTest : public PowerUsageMonitor::SystemInterface { |
| 12 public: |
| 13 SystemInterfaceForTest() |
| 14 : num_pending_histogram_reports_(0), now_(base::Time::Now()) {} |
| 15 virtual ~SystemInterfaceForTest() {} |
| 16 |
| 17 int num_pending_histogram_reports() { return num_pending_histogram_reports_; } |
| 18 |
| 19 virtual void AdvanceClockSeconds(int seconds) { |
| 20 now_ += base::TimeDelta::FromSeconds(seconds); |
| 21 } |
| 22 |
| 23 virtual void AdvanceClockHours(int hours) { |
| 24 now_ += base::TimeDelta::FromHours(hours); |
| 25 } |
| 26 |
| 27 virtual void ScheduleHistogramReport(base::TimeDelta delay) override { |
| 28 num_pending_histogram_reports_++; |
| 29 } |
| 30 |
| 31 virtual void CancelPendingHistgramReports() override { |
| 32 num_pending_histogram_reports_ = 0; |
| 33 } |
| 34 |
| 35 virtual base::Time Now() override { return now_; } |
| 36 |
| 37 protected: |
| 38 virtual void ReportBatteryLevelHistogram( |
| 39 base::TimeDelta discharge_time) override {} |
| 40 |
| 41 private: |
| 42 int num_pending_histogram_reports_; |
| 43 base::Time now_; |
| 44 }; |
| 45 |
| 46 class PowerUsageMonitorTest : public testing::Test { |
| 47 protected: |
| 48 virtual void SetUp() { |
| 49 monitor_.reset(new PowerUsageMonitor); |
| 50 // PowerUsageMonitor assumes ownership. |
| 51 scoped_ptr<SystemInterfaceForTest> test_interface( |
| 52 new SystemInterfaceForTest()); |
| 53 system_interface_ = test_interface.get(); |
| 54 monitor_->SetSystemInterfaceForTest(test_interface.Pass()); |
| 55 |
| 56 // Without live renderers, the monitor won't do anything. |
| 57 monitor_->SetNumLiveRenderersForTest(1); |
| 58 } |
| 59 |
| 60 void UpdateBatteryStatus(bool charging, double battery_level) { |
| 61 blink::WebBatteryStatus battery_status; |
| 62 battery_status.charging = charging; |
| 63 battery_status.level = battery_level; |
| 64 monitor_->OnBatteryStatusUpdate(battery_status); |
| 65 } |
| 66 scoped_ptr<PowerUsageMonitor> monitor_; |
| 67 SystemInterfaceForTest* system_interface_; |
| 68 }; |
| 69 |
| 70 TEST_F(PowerUsageMonitorTest, StartStop) { |
| 71 // Going on battery power. |
| 72 UpdateBatteryStatus(false, 1.0); |
| 73 int initial_num_histogram_reports = |
| 74 system_interface_->num_pending_histogram_reports(); |
| 75 ASSERT_GT(initial_num_histogram_reports, 0); |
| 76 |
| 77 // Battery level goes down a bit. |
| 78 system_interface_->AdvanceClockSeconds(1); |
| 79 UpdateBatteryStatus(false, 0.9); |
| 80 ASSERT_EQ(initial_num_histogram_reports, |
| 81 system_interface_->num_pending_histogram_reports()); |
| 82 |
| 83 // Wall power connected. |
| 84 system_interface_->AdvanceClockSeconds(30); |
| 85 UpdateBatteryStatus(true, 0.5); |
| 86 ASSERT_EQ(system_interface_->num_pending_histogram_reports(), 0); |
| 87 } |
| 88 |
| 89 TEST_F(PowerUsageMonitorTest, NoRenderersDisablesMonitoring) { |
| 90 monitor_->SetNumLiveRenderersForTest(0); |
| 91 |
| 92 // Going on battery power. |
| 93 UpdateBatteryStatus(false, 1.0); |
| 94 ASSERT_EQ(system_interface_->num_pending_histogram_reports(), 0); |
| 95 |
| 96 // Wall power connected. |
| 97 system_interface_->AdvanceClockSeconds(30); |
| 98 UpdateBatteryStatus(true, 0.5); |
| 99 ASSERT_EQ(system_interface_->num_pending_histogram_reports(), 0); |
| 100 } |
| 101 |
| 102 TEST_F(PowerUsageMonitorTest, ReportOnceEvery24Hours) { |
| 103 // Going on battery power. |
| 104 UpdateBatteryStatus(false, 1.0); |
| 105 ASSERT_GT(system_interface_->num_pending_histogram_reports(), 0); |
| 106 |
| 107 // Tell the monitor that a histogram was recorded. |
| 108 monitor_->BatteryLevelReported(); |
| 109 |
| 110 // Connect back to wall power. |
| 111 system_interface_->AdvanceClockHours(1); |
| 112 UpdateBatteryStatus(true, 0.9); |
| 113 |
| 114 // Disconnect from Wall power. |
| 115 UpdateBatteryStatus(false, 1.0); |
| 116 ASSERT_EQ(system_interface_->num_pending_histogram_reports(), 0); |
| 117 |
| 118 // Back on wall power. |
| 119 UpdateBatteryStatus(true, 0.9); |
| 120 |
| 121 // 24 hours later. |
| 122 system_interface_->AdvanceClockHours(24); |
| 123 |
| 124 // Disconnect from Wall power. |
| 125 UpdateBatteryStatus(false, 1.0); |
| 126 ASSERT_GT(system_interface_->num_pending_histogram_reports(), 0); |
| 127 } |
| 128 |
| 129 } // namespace content |
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