content/renderer/pepper/plugin_instance_throttler_impl_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/bind.h"
   6 #include "base/command_line.h"
   7 #include "base/logging.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "content/public/common/content_switches.h"
  11 #include "content/public/renderer/render_frame.h"
  12 #include "content/renderer/pepper/plugin_instance_throttler_impl.h"
  13 #include "testing/gmock/include/gmock/gmock.h"
  14 #include "testing/gtest/include/gtest/gtest.h"
  15 #include "third_party/WebKit/public/web/WebInputEvent.h"
  16 #include "third_party/WebKit/public/web/WebPluginParams.h"
  17 #include "ui/gfx/canvas.h"
  18
  19 using testing::_;
  20 using testing::Return;
  21
  22 class GURL;
  23
  24 namespace content {
  25
  26 class PluginInstanceThrottlerImplTest
  27     : public testing::Test,
  28       public PluginInstanceThrottler::Observer {
  29  protected:
  30   const int kMaximumFramesToExamine =
  31       PluginInstanceThrottlerImpl::kMaximumFramesToExamine;
  32
  33   PluginInstanceThrottlerImplTest() : change_callback_calls_(0) {}
  34   ~PluginInstanceThrottlerImplTest() override {
  35     throttler_->RemoveObserver(this);
  36   }
  37
  38   void SetUp() override {
  39     throttler_.reset(new PluginInstanceThrottlerImpl);
  40     throttler_->Initialize(nullptr, GURL("http://example.com"),
  41                            "Shockwave Flash", gfx::Size(100, 100));
  42     throttler_->AddObserver(this);
  43   }
  44
  45   PluginInstanceThrottlerImpl* throttler() {
  46     DCHECK(throttler_.get());
  47     return throttler_.get();
  48   }
  49
  50   void DisablePowerSaverByRetroactiveWhitelist() {
  51     throttler()->MarkPluginEssential(
  52         PluginInstanceThrottlerImpl::UNTHROTTLE_METHOD_BY_WHITELIST);
  53   }
  54
  55   int change_callback_calls() { return change_callback_calls_; }
  56
  57   void EngageThrottle() { throttler_->EngageThrottle(); }
  58
  59   void SendEventAndTest(blink::WebInputEvent::Type event_type,
  60                         bool expect_consumed,
  61                         bool expect_throttled,
  62                         int expect_change_callback_count) {
  63     blink::WebMouseEvent event;
  64     event.type = event_type;
  65     event.modifiers = blink::WebInputEvent::Modifiers::LeftButtonDown;
  66     EXPECT_EQ(expect_consumed, throttler()->ConsumeInputEvent(event));
  67     EXPECT_EQ(expect_throttled, throttler()->IsThrottled());
  68     EXPECT_EQ(expect_change_callback_count, change_callback_calls());
  69   }
  70
  71  private:
  72   // PluginInstanceThrottlerImpl::Observer
  73   void OnThrottleStateChange() override { ++change_callback_calls_; }
  74
  75   scoped_ptr<PluginInstanceThrottlerImpl> throttler_;
  76
  77   int change_callback_calls_;
  78
  79   base::MessageLoop loop_;
  80 };
  81
  82 TEST_F(PluginInstanceThrottlerImplTest, ThrottleAndUnthrottleByClick) {
  83   EXPECT_FALSE(throttler()->IsThrottled());
  84   EXPECT_EQ(0, change_callback_calls());
  85
  86   EngageThrottle();
  87   EXPECT_TRUE(throttler()->IsThrottled());
  88   EXPECT_EQ(1, change_callback_calls());
  89
  90   // MouseUp while throttled should be consumed and disengage throttling.
  91   SendEventAndTest(blink::WebInputEvent::Type::MouseUp, true, false, 2);
  92 }
  93
  94 TEST_F(PluginInstanceThrottlerImplTest, ThrottleByKeyframe) {
  95   EXPECT_FALSE(throttler()->IsThrottled());
  96   EXPECT_EQ(0, change_callback_calls());
  97
  98   SkBitmap boring_bitmap;
  99   gfx::Canvas canvas(gfx::Size(20, 10), 1.0f, true);
 100   canvas.FillRect(gfx::Rect(20, 10), SK_ColorBLACK);
 101   canvas.FillRect(gfx::Rect(10, 10), SK_ColorWHITE);
 102   SkBitmap interesting_bitmap =
 103       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
 104
 105   // Don't throttle for a boring frame.
 106   throttler()->OnImageFlush(&boring_bitmap);
 107   EXPECT_FALSE(throttler()->IsThrottled());
 108   EXPECT_EQ(0, change_callback_calls());
 109
 110   // Throttle after an interesting frame.
 111   throttler()->OnImageFlush(&interesting_bitmap);
 112   EXPECT_TRUE(throttler()->IsThrottled());
 113   EXPECT_EQ(1, change_callback_calls());
 114 }
 115
 116 TEST_F(PluginInstanceThrottlerImplTest, MaximumKeyframesAnalyzed) {
 117   EXPECT_FALSE(throttler()->IsThrottled());
 118   EXPECT_EQ(0, change_callback_calls());
 119
 120   SkBitmap boring_bitmap;
 121
 122   // Throttle after tons of boring bitmaps.
 123   for (int i = 0; i < kMaximumFramesToExamine; ++i) {
 124     throttler()->OnImageFlush(&boring_bitmap);
 125   }
 126   EXPECT_TRUE(throttler()->IsThrottled());
 127   EXPECT_EQ(1, change_callback_calls());
 128 }
 129 TEST_F(PluginInstanceThrottlerImplTest, IgnoreThrottlingAfterMouseUp) {
 130   EXPECT_FALSE(throttler()->IsThrottled());
 131   EXPECT_EQ(0, change_callback_calls());
 132
 133   // MouseUp before throttling engaged should not be consumed, but should
 134   // prevent subsequent throttling from engaging.
 135   SendEventAndTest(blink::WebInputEvent::Type::MouseUp, false, false, 0);
 136
 137   EngageThrottle();
 138   EXPECT_FALSE(throttler()->IsThrottled());
 139   EXPECT_EQ(0, change_callback_calls());
 140 }
 141
 142 TEST_F(PluginInstanceThrottlerImplTest, FastWhitelisting) {
 143   EXPECT_FALSE(throttler()->IsThrottled());
 144   EXPECT_EQ(0, change_callback_calls());
 145
 146   DisablePowerSaverByRetroactiveWhitelist();
 147
 148   EngageThrottle();
 149   EXPECT_FALSE(throttler()->IsThrottled());
 150   EXPECT_EQ(0, change_callback_calls());
 151 }
 152
 153 TEST_F(PluginInstanceThrottlerImplTest, SlowWhitelisting) {
 154   EXPECT_FALSE(throttler()->IsThrottled());
 155   EXPECT_EQ(0, change_callback_calls());
 156
 157   EngageThrottle();
 158   EXPECT_TRUE(throttler()->IsThrottled());
 159   EXPECT_EQ(1, change_callback_calls());
 160
 161   DisablePowerSaverByRetroactiveWhitelist();
 162   EXPECT_FALSE(throttler()->IsThrottled());
 163   EXPECT_EQ(2, change_callback_calls());
 164 }
 165
 166 TEST_F(PluginInstanceThrottlerImplTest, EventConsumption) {
 167   EXPECT_FALSE(throttler()->IsThrottled());
 168   EXPECT_EQ(0, change_callback_calls());
 169
 170   EngageThrottle();
 171   EXPECT_TRUE(throttler()->IsThrottled());
 172   EXPECT_EQ(1, change_callback_calls());
 173
 174   // Consume but don't unthrottle on a variety of other events.
 175   SendEventAndTest(blink::WebInputEvent::Type::MouseDown, true, true, 1);
 176   SendEventAndTest(blink::WebInputEvent::Type::MouseWheel, true, true, 1);
 177   SendEventAndTest(blink::WebInputEvent::Type::MouseMove, true, true, 1);
 178   SendEventAndTest(blink::WebInputEvent::Type::KeyDown, true, true, 1);
 179   SendEventAndTest(blink::WebInputEvent::Type::KeyUp, true, true, 1);
 180
 181   // Consume and unthrottle on MouseUp
 182   SendEventAndTest(blink::WebInputEvent::Type::MouseUp, true, false, 2);
 183
 184   // Don't consume events after unthrottle.
 185   SendEventAndTest(blink::WebInputEvent::Type::MouseDown, false, false, 2);
 186   SendEventAndTest(blink::WebInputEvent::Type::MouseWheel, false, false, 2);
 187   SendEventAndTest(blink::WebInputEvent::Type::MouseMove, false, false, 2);
 188   SendEventAndTest(blink::WebInputEvent::Type::KeyDown, false, false, 2);
 189   SendEventAndTest(blink::WebInputEvent::Type::KeyUp, false, false, 2);
 190
 191   // Subsequent MouseUps should also not be consumed.
 192   SendEventAndTest(blink::WebInputEvent::Type::MouseUp, false, false, 2);
 193 }
 194
 195 TEST_F(PluginInstanceThrottlerImplTest, ThrottleOnLeftClickOnly) {
 196   EXPECT_FALSE(throttler()->IsThrottled());
 197   EXPECT_EQ(0, change_callback_calls());
 198
 199   EngageThrottle();
 200   EXPECT_TRUE(throttler()->IsThrottled());
 201   EXPECT_EQ(1, change_callback_calls());
 202
 203   blink::WebMouseEvent event;
 204   event.type = blink::WebInputEvent::Type::MouseUp;
 205
 206   event.modifiers = blink::WebInputEvent::Modifiers::RightButtonDown;
 207   EXPECT_FALSE(throttler()->ConsumeInputEvent(event));
 208   EXPECT_TRUE(throttler()->IsThrottled());
 209
 210   event.modifiers = blink::WebInputEvent::Modifiers::MiddleButtonDown;
 211   EXPECT_TRUE(throttler()->ConsumeInputEvent(event));
 212   EXPECT_TRUE(throttler()->IsThrottled());
 213
 214   event.modifiers = blink::WebInputEvent::Modifiers::LeftButtonDown;
 215   EXPECT_TRUE(throttler()->ConsumeInputEvent(event));
 216   EXPECT_FALSE(throttler()->IsThrottled());
 217 }
 218
 219 }  // namespace content