content/common/input/web_input_event_traits_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 "content/common/input/web_input_event_traits.h"
   6
   7 #include <limits>
   8
   9 #include "testing/gtest/include/gtest/gtest.h"
  10 #include "third_party/WebKit/public/web/WebInputEvent.h"
  11
  12 using blink::WebGestureEvent;
  13 using blink::WebInputEvent;
  14 using blink::WebKeyboardEvent;
  15 using blink::WebMouseEvent;
  16 using blink::WebMouseWheelEvent;
  17 using blink::WebTouchEvent;
  18 using blink::WebTouchPoint;
  19 using std::numeric_limits;
  20
  21 namespace content {
  22 namespace {
  23
  24 class WebInputEventTraitsTest : public testing::Test {
  25  protected:
  26   static WebTouchPoint CreateTouchPoint(WebTouchPoint::State state, int id) {
  27     WebTouchPoint touch;
  28     touch.state = state;
  29     touch.id = id;
  30     return touch;
  31   }
  32
  33   static WebTouchEvent CreateTouch(WebInputEvent::Type type) {
  34     return CreateTouch(type, 1);
  35   }
  36
  37   static WebTouchEvent CreateTouch(WebInputEvent::Type type,
  38                                    unsigned touch_count) {
  39     WebTouchEvent event;
  40     event.touchesLength = touch_count;
  41     event.type = type;
  42     return event;
  43   }
  44
  45   static WebGestureEvent CreateGesture(WebInputEvent::Type type,
  46                                        float x,
  47                                        float y) {
  48     WebGestureEvent event;
  49     event.type = type;
  50     event.x = x;
  51     event.y = y;
  52     return event;
  53   }
  54
  55   static WebMouseWheelEvent CreateMouseWheel(float deltaX,
  56                                              float deltaY,
  57                                              bool canScroll) {
  58     WebMouseWheelEvent event;
  59     event.type = WebInputEvent::MouseWheel;
  60     event.deltaX = deltaX;
  61     event.deltaY = deltaY;
  62     event.canScroll = canScroll;
  63     return event;
  64   }
  65 };
  66
  67 TEST_F(WebInputEventTraitsTest, TouchEventCoalescing) {
  68   WebTouchEvent touch0 = CreateTouch(WebInputEvent::TouchStart);
  69   WebTouchEvent touch1 = CreateTouch(WebInputEvent::TouchMove);
  70
  71   // Non touch-moves won't coalesce.
  72   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(touch0, touch0));
  73
  74   // Touches of different types won't coalesce.
  75   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(touch0, touch1));
  76
  77   // Touch moves with idential touch lengths and touch ids should coalesce.
  78   EXPECT_TRUE(WebInputEventTraits::CanCoalesce(touch1, touch1));
  79
  80   // Touch moves with different touch ids should not coalesce.
  81   touch0 = CreateTouch(WebInputEvent::TouchMove);
  82   touch1 = CreateTouch(WebInputEvent::TouchMove);
  83   touch0.touches[0].id = 7;
  84   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(touch0, touch1));
  85   touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
  86   touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
  87   touch0.touches[0].id = 1;
  88   touch1.touches[0].id = 0;
  89   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(touch0, touch1));
  90
  91   // Touch moves with different touch lengths should not coalesce.
  92   touch0 = CreateTouch(WebInputEvent::TouchMove, 1);
  93   touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
  94   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(touch0, touch1));
  95
  96   // Touch moves with identical touch ids in different orders should coalesce.
  97   touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
  98   touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
  99   touch0.touches[0] = touch1.touches[1] =
 100       CreateTouchPoint(WebTouchPoint::StateMoved, 1);
 101   touch0.touches[1] = touch1.touches[0] =
 102       CreateTouchPoint(WebTouchPoint::StateMoved, 0);
 103   EXPECT_TRUE(WebInputEventTraits::CanCoalesce(touch0, touch1));
 104
 105   // Pointers with the same ID's should coalesce.
 106   touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
 107   touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
 108   touch0.touches[0] = touch1.touches[1] =
 109       CreateTouchPoint(WebTouchPoint::StateMoved, 1);
 110   WebInputEventTraits::Coalesce(touch0, &touch1);
 111   ASSERT_EQ(1, touch1.touches[0].id);
 112   ASSERT_EQ(0, touch1.touches[1].id);
 113   EXPECT_EQ(WebTouchPoint::StateUndefined, touch1.touches[1].state);
 114   EXPECT_EQ(WebTouchPoint::StateMoved, touch1.touches[0].state);
 115
 116   // Movement from now-stationary pointers should be preserved.
 117   touch0 = touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
 118   touch0.touches[0] = CreateTouchPoint(WebTouchPoint::StateMoved, 1);
 119   touch1.touches[1] = CreateTouchPoint(WebTouchPoint::StateStationary, 1);
 120   touch0.touches[1] = CreateTouchPoint(WebTouchPoint::StateStationary, 0);
 121   touch1.touches[0] = CreateTouchPoint(WebTouchPoint::StateMoved, 0);
 122   WebInputEventTraits::Coalesce(touch0, &touch1);
 123   ASSERT_EQ(1, touch1.touches[0].id);
 124   ASSERT_EQ(0, touch1.touches[1].id);
 125   EXPECT_EQ(WebTouchPoint::StateMoved, touch1.touches[0].state);
 126   EXPECT_EQ(WebTouchPoint::StateMoved, touch1.touches[1].state);
 127 }
 128
 129 TEST_F(WebInputEventTraitsTest, PinchEventCoalescing) {
 130   WebGestureEvent pinch0 =
 131       CreateGesture(WebInputEvent::GesturePinchBegin, 1, 1);
 132   WebGestureEvent pinch1 =
 133       CreateGesture(WebInputEvent::GesturePinchUpdate, 2, 2);
 134
 135   // Only GesturePinchUpdate's coalesce.
 136   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(pinch0, pinch0));
 137
 138   // Pinch gestures of different types should not coalesce.
 139   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(pinch0, pinch1));
 140
 141   // Pinches with different focal points should not coalesce.
 142   pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
 143   pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 2, 2);
 144   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(pinch0, pinch1));
 145   EXPECT_TRUE(WebInputEventTraits::CanCoalesce(pinch0, pinch0));
 146
 147   // Coalesced scales are multiplicative.
 148   pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
 149   pinch0.data.pinchUpdate.scale = 2.f;
 150   pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
 151   pinch1.data.pinchUpdate.scale = 3.f;
 152   EXPECT_TRUE(WebInputEventTraits::CanCoalesce(pinch0, pinch0));
 153   WebInputEventTraits::Coalesce(pinch0, &pinch1);
 154   EXPECT_EQ(2.f * 3.f, pinch1.data.pinchUpdate.scale);
 155
 156   // Scales have a minimum value and can never reach 0.
 157   ASSERT_GT(numeric_limits<float>::min(), 0);
 158   pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
 159   pinch0.data.pinchUpdate.scale = numeric_limits<float>::min() * 2.0f;
 160   pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
 161   pinch1.data.pinchUpdate.scale = numeric_limits<float>::min() * 5.0f;
 162   EXPECT_TRUE(WebInputEventTraits::CanCoalesce(pinch0, pinch1));
 163   WebInputEventTraits::Coalesce(pinch0, &pinch1);
 164   EXPECT_EQ(numeric_limits<float>::min(), pinch1.data.pinchUpdate.scale);
 165
 166   // Scales have a maximum value and can never reach Infinity.
 167   pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
 168   pinch0.data.pinchUpdate.scale = numeric_limits<float>::max() / 2.0f;
 169   pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
 170   pinch1.data.pinchUpdate.scale = 10.0f;
 171   EXPECT_TRUE(WebInputEventTraits::CanCoalesce(pinch0, pinch1));
 172   WebInputEventTraits::Coalesce(pinch0, &pinch1);
 173   EXPECT_EQ(numeric_limits<float>::max(), pinch1.data.pinchUpdate.scale);
 174 }
 175
 176 TEST_F(WebInputEventTraitsTest, WebMouseWheelEventCoalescing) {
 177   WebMouseWheelEvent mouse_wheel_0 =
 178       CreateMouseWheel(1, 1, true);
 179   WebMouseWheelEvent mouse_wheel_1 =
 180       CreateMouseWheel(2, 2, true);
 181
 182   // WebMouseWheelEvent objects with same values except different deltaX and
 183   // deltaY should coalesce.
 184   EXPECT_TRUE(WebInputEventTraits::CanCoalesce(mouse_wheel_0, mouse_wheel_1));
 185
 186   mouse_wheel_0 = CreateMouseWheel(1, 1, true);
 187   mouse_wheel_1 = CreateMouseWheel(1, 1, false);
 188
 189   // WebMouseWheelEvent objects with different canScroll values should not
 190   // coalesce.
 191   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(mouse_wheel_0, mouse_wheel_1));
 192
 193   // WebMouseWheelEvent objects with different modifiers should not coalesce.
 194   mouse_wheel_0 = CreateMouseWheel(1, 1, true);
 195   mouse_wheel_1 = CreateMouseWheel(1, 1, true);
 196   mouse_wheel_0.modifiers = blink::WebInputEvent::ControlKey;
 197   mouse_wheel_1.modifiers = blink::WebInputEvent::ShiftKey;
 198   EXPECT_FALSE(WebInputEventTraits::CanCoalesce(mouse_wheel_0, mouse_wheel_1));
 199 }
 200
 201 // Very basic smoke test to ensure stringification doesn't explode.
 202 TEST_F(WebInputEventTraitsTest, ToString) {
 203   WebKeyboardEvent key;
 204   key.type = WebInputEvent::RawKeyDown;
 205   EXPECT_FALSE(WebInputEventTraits::ToString(key).empty());
 206
 207   WebMouseEvent mouse;
 208   mouse.type = WebInputEvent::MouseMove;
 209   EXPECT_FALSE(WebInputEventTraits::ToString(mouse).empty());
 210
 211   WebMouseWheelEvent mouse_wheel;
 212   mouse_wheel.type = WebInputEvent::MouseWheel;
 213   EXPECT_FALSE(WebInputEventTraits::ToString(mouse_wheel).empty());
 214
 215   WebGestureEvent gesture =
 216       CreateGesture(WebInputEvent::GesturePinchBegin, 1, 1);
 217   EXPECT_FALSE(WebInputEventTraits::ToString(gesture).empty());
 218
 219   WebTouchEvent touch = CreateTouch(WebInputEvent::TouchStart);
 220   EXPECT_FALSE(WebInputEventTraits::ToString(touch).empty());
 221 }
 222
 223 }  // namespace
 224 }  // namespace content