content/browser/power_profiler/power_profiler_service_unittest.cc

   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 "base/message_loop/message_loop.h"
   6 #include "base/run_loop.h"
   7 #include "content/browser/browser_thread_impl.h"
   8 #include "content/browser/power_profiler/power_profiler_service.h"
   9 #include "testing/gtest/include/gtest/gtest.h"
  10
  11 namespace content {
  12
  13 namespace {
  14
  15 const int kNumEvents = 3;
  16 const int kDefaultSamplePeriodMs = 50;
  17
  18 // Provide a set number of power events.
  19 class TestPowerDataProvider : public PowerDataProvider {
  20  public:
  21   TestPowerDataProvider(int count) : num_events_to_send_(count) {}
  22   virtual ~TestPowerDataProvider() {}
  23
  24   virtual PowerEventVector GetData() OVERRIDE {
  25     PowerEventVector events;
  26     if (num_events_to_send_ == 0)
  27       return events;
  28
  29     PowerEvent event;
  30     event.type = PowerEvent::SOC_PACKAGE;
  31     event.time = base::TimeTicks::Now();
  32     event.value = 1.0;
  33     events.push_back(event);
  34
  35     num_events_to_send_--;
  36     return events;
  37   }
  38
  39   virtual base::TimeDelta GetSamplingRate() OVERRIDE {
  40     return base::TimeDelta::FromMilliseconds(kDefaultSamplePeriodMs);
  41   }
  42
  43   virtual AccuracyLevel GetAccuracyLevel() OVERRIDE { return High; }
  44
  45  private:
  46   int num_events_to_send_;
  47   DISALLOW_COPY_AND_ASSIGN(TestPowerDataProvider);
  48 };
  49
  50 class TestPowerProfilerObserver : public PowerProfilerObserver {
  51  public:
  52   TestPowerProfilerObserver()
  53       : valid_event_count_(0),
  54         total_num_events_received_(0) {}
  55   virtual ~TestPowerProfilerObserver() {}
  56
  57   virtual void OnPowerEvent(const PowerEventVector& events) OVERRIDE {
  58     if (IsValidEvent(events[0]))
  59       ++valid_event_count_;
  60
  61     total_num_events_received_++;
  62     if (total_num_events_received_ >= kNumEvents) {
  63       // All expected events received, exiting.
  64       quit_closure_.Run();
  65     }
  66   }
  67
  68   int valid_event_count() const { return valid_event_count_; }
  69   void set_quit_closure(base::Closure closure) { quit_closure_ = closure; }
  70
  71  private:
  72   bool IsValidEvent(const PowerEvent& event) {
  73     return event.type == PowerEvent::SOC_PACKAGE &&
  74            !event.time.is_null() &&
  75            event.value > 0;
  76   }
  77
  78   int valid_event_count_;
  79   int total_num_events_received_;
  80   base::Closure quit_closure_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(TestPowerProfilerObserver);
  83 };
  84
  85 } // namespace
  86
  87 class PowerProfilerServiceTest : public testing::Test {
  88  public:
  89   void ServiceStartTest() {
  90     service_.reset(new PowerProfilerService(
  91         make_scoped_ptr<PowerDataProvider>(
  92             new TestPowerDataProvider(kNumEvents)),
  93         message_loop_.message_loop_proxy(),
  94         base::TimeDelta::FromMilliseconds(1)));
  95     EXPECT_TRUE(service_->IsAvailable());
  96   }
  97
  98   void AddObserverTest() {
  99     service_->AddObserver(&observer_);
 100
 101     // No PowerEvents received.
 102     EXPECT_EQ(observer_.valid_event_count(), 0);
 103   }
 104
 105   void RemoveObserverTest() {
 106      service_->RemoveObserver(&observer_);
 107
 108     // Received |kNumEvents| events.
 109     EXPECT_EQ(observer_.valid_event_count(), kNumEvents);
 110   }
 111
 112  protected:
 113   PowerProfilerServiceTest() : ui_thread_(BrowserThread::UI, &message_loop_) {}
 114   virtual ~PowerProfilerServiceTest() {}
 115
 116   void RegisterQuitClosure(base::Closure closure) {
 117     observer_.set_quit_closure(closure);
 118   }
 119
 120  private:
 121   scoped_ptr<PowerProfilerService> service_;
 122   TestPowerProfilerObserver observer_;
 123
 124   // UI thread.
 125   base::MessageLoopForUI message_loop_;
 126   BrowserThreadImpl ui_thread_;
 127
 128   DISALLOW_COPY_AND_ASSIGN(PowerProfilerServiceTest);
 129 };
 130
 131 // Test whether PowerProfilerService dispatches power events to observer
 132 // properly.
 133 TEST_F(PowerProfilerServiceTest, AvailableService) {
 134   base::RunLoop run_loop;
 135   RegisterQuitClosure(run_loop.QuitClosure());
 136
 137   ServiceStartTest();
 138   AddObserverTest();
 139
 140   run_loop.Run();
 141
 142   RemoveObserverTest();
 143 }
 144
 145 }  // namespace content