Consolidate WebInputEvent Coalescing unit tests

content/common/input/web_input_event_traits_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/input/web_input_event_traits.h"
 
-#include <limits>
-
-#include "content/common/input/event_with_latency_info.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 
 using blink::WebGestureEvent;
 using blink::WebInputEvent;
 using blink::WebKeyboardEvent;
 using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
 using blink::WebTouchEvent;
-using blink::WebTouchPoint;
-using std::numeric_limits;
 
 namespace content {
 namespace {
 
-// TODO(tapted): Move the Coalesce tests to event_with_latency_info_unittest.cc.
-// Merge this test harness into EventWithLatencyInfoTest.
-// http://crbug.com/625000.
-class WebInputEventTraitsTest : public testing::Test {
- protected:
-  static WebTouchPoint CreateTouchPoint(WebTouchPoint::State state, int id) {
-    WebTouchPoint touch;
-    touch.state = state;
-    touch.id = id;
-    return touch;
-  }
-
-  static TouchEventWithLatencyInfo CreateTouch(WebInputEvent::Type type) {
-    return CreateTouch(type, 1);
-  }
-
-  static TouchEventWithLatencyInfo CreateTouch(WebInputEvent::Type type,
-                                               unsigned touch_count) {
-    WebTouchEvent event;
-    event.touchesLength = touch_count;
-    event.type = type;
-    return TouchEventWithLatencyInfo(event);
-  }
-
-  static GestureEventWithLatencyInfo CreateGesture(WebInputEvent::Type type,
-                                                   float x,
-                                                   float y) {
-    WebGestureEvent event;
-    event.type = type;
-    event.x = x;
-    event.y = y;
-    return GestureEventWithLatencyInfo(event);
-  }
-
-  static MouseWheelEventWithLatencyInfo CreateMouseWheel(float deltaX,
-                                                         float deltaY) {
-    WebMouseWheelEvent event;
-    event.type = WebInputEvent::MouseWheel;
-    event.deltaX = deltaX;
-    event.deltaY = deltaY;
-    return MouseWheelEventWithLatencyInfo(event);
-  }
-};
-
-template <class T>
-bool CanCoalesce(const T& event_to_coalesce, const T& event) {
-  return event.CanCoalesceWith(event_to_coalesce);
-}
-
-template <class T>
-void Coalesce(const T& event_to_coalesce, T* event) {
-  return event->CoalesceWith(event_to_coalesce);
-}
-
-TEST_F(WebInputEventTraitsTest, TouchEventCoalescing) {
-  TouchEventWithLatencyInfo touch0 = CreateTouch(WebInputEvent::TouchStart);
-  TouchEventWithLatencyInfo touch1 = CreateTouch(WebInputEvent::TouchMove);
-
-  // Non touch-moves won't coalesce.
-  EXPECT_FALSE(CanCoalesce(touch0, touch0));
-
-  // Touches of different types won't coalesce.
-  EXPECT_FALSE(CanCoalesce(touch0, touch1));
-
-  // Touch moves with idential touch lengths and touch ids should coalesce.
-  EXPECT_TRUE(CanCoalesce(touch1, touch1));
-
-  // Touch moves with different touch ids should not coalesce.
-  touch0 = CreateTouch(WebInputEvent::TouchMove);
-  touch1 = CreateTouch(WebInputEvent::TouchMove);
-  touch0.event.touches[0].id = 7;
-  EXPECT_FALSE(CanCoalesce(touch0, touch1));
-  touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch0.event.touches[0].id = 1;
-  touch1.event.touches[0].id = 0;
-  EXPECT_FALSE(CanCoalesce(touch0, touch1));
-
-  // Touch moves with different touch lengths should not coalesce.
-  touch0 = CreateTouch(WebInputEvent::TouchMove, 1);
-  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
-  EXPECT_FALSE(CanCoalesce(touch0, touch1));
-
-  // Touch moves with identical touch ids in different orders should coalesce.
-  touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch0.event.touches[0] = touch1.event.touches[1] =
-      CreateTouchPoint(WebTouchPoint::StateMoved, 1);
-  touch0.event.touches[1] = touch1.event.touches[0] =
-      CreateTouchPoint(WebTouchPoint::StateMoved, 0);
-  EXPECT_TRUE(CanCoalesce(touch0, touch1));
-
-  // Pointers with the same ID's should coalesce.
-  touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch0.event.touches[0] = touch1.event.touches[1] =
-      CreateTouchPoint(WebTouchPoint::StateMoved, 1);
-  Coalesce(touch0, &touch1);
-  ASSERT_EQ(1, touch1.event.touches[0].id);
-  ASSERT_EQ(0, touch1.event.touches[1].id);
-  EXPECT_EQ(WebTouchPoint::StateUndefined, touch1.event.touches[1].state);
-  EXPECT_EQ(WebTouchPoint::StateMoved, touch1.event.touches[0].state);
-
-  // Movement from now-stationary pointers should be preserved.
-  touch0 = touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch0.event.touches[0] = CreateTouchPoint(WebTouchPoint::StateMoved, 1);
-  touch1.event.touches[1] = CreateTouchPoint(WebTouchPoint::StateStationary, 1);
-  touch0.event.touches[1] = CreateTouchPoint(WebTouchPoint::StateStationary, 0);
-  touch1.event.touches[0] = CreateTouchPoint(WebTouchPoint::StateMoved, 0);
-  Coalesce(touch0, &touch1);
-  ASSERT_EQ(1, touch1.event.touches[0].id);
-  ASSERT_EQ(0, touch1.event.touches[1].id);
-  EXPECT_EQ(WebTouchPoint::StateMoved, touch1.event.touches[0].state);
-  EXPECT_EQ(WebTouchPoint::StateMoved, touch1.event.touches[1].state);
-
-  // Touch moves with different dispatchTypes coalesce.
-  touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch0.event.dispatchType = WebInputEvent::DispatchType::Blocking;
-  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch1.event.dispatchType = WebInputEvent::DispatchType::EventNonBlocking;
-  touch0.event.touches[0] = touch1.event.touches[1] =
-      CreateTouchPoint(WebTouchPoint::StateMoved, 1);
-  touch0.event.touches[1] = touch1.event.touches[0] =
-      CreateTouchPoint(WebTouchPoint::StateMoved, 0);
-  EXPECT_TRUE(CanCoalesce(touch0, touch1));
-  Coalesce(touch0, &touch1);
-  ASSERT_EQ(WebInputEvent::DispatchType::Blocking, touch1.event.dispatchType);
-
-  touch0 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch0.event.dispatchType =
-      WebInputEvent::DispatchType::ListenersForcedNonBlockingPassive;
-  touch1 = CreateTouch(WebInputEvent::TouchMove, 2);
-  touch1.event.dispatchType =
-      WebInputEvent::DispatchType::ListenersNonBlockingPassive;
-  touch0.event.touches[0] = touch1.event.touches[1] =
-      CreateTouchPoint(WebTouchPoint::StateMoved, 1);
-  touch0.event.touches[1] = touch1.event.touches[0] =
-      CreateTouchPoint(WebTouchPoint::StateMoved, 0);
-  EXPECT_TRUE(CanCoalesce(touch0, touch1));
-  Coalesce(touch0, &touch1);
-  ASSERT_EQ(WebInputEvent::DispatchType::ListenersNonBlockingPassive,
-            touch1.event.dispatchType);
-}
-
-TEST_F(WebInputEventTraitsTest, PinchEventCoalescing) {
-  GestureEventWithLatencyInfo pinch0 =
-      CreateGesture(WebInputEvent::GesturePinchBegin, 1, 1);
-  GestureEventWithLatencyInfo pinch1 =
-      CreateGesture(WebInputEvent::GesturePinchUpdate, 2, 2);
-
-  // Only GesturePinchUpdate's coalesce.
-  EXPECT_FALSE(CanCoalesce(pinch0, pinch0));
-
-  // Pinch gestures of different types should not coalesce.
-  EXPECT_FALSE(CanCoalesce(pinch0, pinch1));
-
-  // Pinches with different focal points should not coalesce.
-  pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
-  pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 2, 2);
-  EXPECT_FALSE(CanCoalesce(pinch0, pinch1));
-  EXPECT_TRUE(CanCoalesce(pinch0, pinch0));
-
-  // Coalesced scales are multiplicative.
-  pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
-  pinch0.event.data.pinchUpdate.scale = 2.f;
-  pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
-  pinch1.event.data.pinchUpdate.scale = 3.f;
-  EXPECT_TRUE(CanCoalesce(pinch0, pinch0));
-  Coalesce(pinch0, &pinch1);
-  EXPECT_EQ(2.f * 3.f, pinch1.event.data.pinchUpdate.scale);
-
-  // Scales have a minimum value and can never reach 0.
-  ASSERT_GT(numeric_limits<float>::min(), 0);
-  pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
-  pinch0.event.data.pinchUpdate.scale = numeric_limits<float>::min() * 2.0f;
-  pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
-  pinch1.event.data.pinchUpdate.scale = numeric_limits<float>::min() * 5.0f;
-  EXPECT_TRUE(CanCoalesce(pinch0, pinch1));
-  Coalesce(pinch0, &pinch1);
-  EXPECT_EQ(numeric_limits<float>::min(), pinch1.event.data.pinchUpdate.scale);
-
-  // Scales have a maximum value and can never reach Infinity.
-  pinch0 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
-  pinch0.event.data.pinchUpdate.scale = numeric_limits<float>::max() / 2.0f;
-  pinch1 = CreateGesture(WebInputEvent::GesturePinchUpdate, 1, 1);
-  pinch1.event.data.pinchUpdate.scale = 10.0f;
-  EXPECT_TRUE(CanCoalesce(pinch0, pinch1));
-  Coalesce(pinch0, &pinch1);
-  EXPECT_EQ(numeric_limits<float>::max(), pinch1.event.data.pinchUpdate.scale);
-}
-
-TEST_F(WebInputEventTraitsTest, WebMouseWheelEventCoalescing) {
-  MouseWheelEventWithLatencyInfo mouse_wheel_0 = CreateMouseWheel(1, 1);
-  MouseWheelEventWithLatencyInfo mouse_wheel_1 = CreateMouseWheel(2, 2);
-
-  // WebMouseWheelEvent objects with same values except different deltaX and
-  // deltaY should coalesce.
-  EXPECT_TRUE(CanCoalesce(mouse_wheel_0, mouse_wheel_1));
-
-  // WebMouseWheelEvent objects with different modifiers should not coalesce.
-  mouse_wheel_0 = CreateMouseWheel(1, 1);
-  mouse_wheel_1 = CreateMouseWheel(1, 1);
-  mouse_wheel_0.event.modifiers = blink::WebInputEvent::ControlKey;
-  mouse_wheel_1.event.modifiers = blink::WebInputEvent::ShiftKey;
-  EXPECT_FALSE(CanCoalesce(mouse_wheel_0, mouse_wheel_1));
-}
-
-// Coalescing preserves the newer timestamp.
-TEST_F(WebInputEventTraitsTest, TimestampCoalescing) {
-  MouseWheelEventWithLatencyInfo mouse_wheel_0 = CreateMouseWheel(1, 1);
-  mouse_wheel_0.event.timeStampSeconds = 5.0;
-  MouseWheelEventWithLatencyInfo mouse_wheel_1 = CreateMouseWheel(2, 2);
-  mouse_wheel_1.event.timeStampSeconds = 10.0;
-
-  EXPECT_TRUE(CanCoalesce(mouse_wheel_0, mouse_wheel_1));
-  Coalesce(mouse_wheel_1, &mouse_wheel_0);
-  EXPECT_EQ(10.0, mouse_wheel_0.event.timeStampSeconds);
-}
+using WebInputEventTraitsTest = testing::Test;
 
 // Very basic smoke test to ensure stringification doesn't explode.
 TEST_F(WebInputEventTraitsTest, ToString) {
   WebKeyboardEvent key;
   key.type = WebInputEvent::RawKeyDown;
   EXPECT_FALSE(WebInputEventTraits::ToString(key).empty());
 
   WebMouseEvent mouse;
   mouse.type = WebInputEvent::MouseMove;
   EXPECT_FALSE(WebInputEventTraits::ToString(mouse).empty());
 
   WebMouseWheelEvent mouse_wheel;
   mouse_wheel.type = WebInputEvent::MouseWheel;
   EXPECT_FALSE(WebInputEventTraits::ToString(mouse_wheel).empty());
 
   WebGestureEvent gesture;
   gesture.type = WebInputEvent::GesturePinchBegin;
   gesture.x = 1;
   gesture.y = 1;
   EXPECT_FALSE(WebInputEventTraits::ToString(gesture).empty());
 
   WebTouchEvent touch;
   touch.type = WebInputEvent::TouchStart;
   touch.touchesLength = 1;
   EXPECT_FALSE(WebInputEventTraits::ToString(touch).empty());
 }
 
 }  // namespace
 }  // namespace content