Articulate the cancel behavior in the WebTouchEvent.

content/renderer/render_widget_unittest.cc

 // Copyright 2013 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/renderer/render_widget.h"
 
 #include <vector>
 
 #include "base/macros.h"
+#include "base/test/histogram_tester.h"
 #include "content/common/input/synthetic_web_input_event_builders.h"
 #include "content/common/input/web_input_event_traits.h"
 #include "content/common/input_messages.h"
 #include "content/public/test/mock_render_thread.h"
 #include "content/test/fake_compositor_dependencies.h"
 #include "content/test/mock_render_process.h"
 #include "ipc/ipc_test_sink.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace content {
 
+namespace {
+
+const char* EVENT_LISTENER_RESULT_HISTOGRAM = "Event.PassiveListeners";
+
+enum {
+  PASSIVE_LISTENER_UMA_ENUM_PASSIVE,
+  PASSIVE_LISTENER_UMA_ENUM_UNCANCELABLE,
+  PASSIVE_LISTENER_UMA_ENUM_SUPPRESSED,
+  PASSIVE_LISTENER_UMA_ENUM_CANCELABLE,
+  PASSIVE_LISTENER_UMA_ENUM_CANCELABLE_AND_CANCELED,
+  PASSIVE_LISTENER_UMA_ENUM_FORCED_NON_BLOCKING,
+  PASSIVE_LISTENER_UMA_ENUM_COUNT
+};
+
+class MockWebWidget : public blink::WebWidget {
+ public:
+  MOCK_METHOD1(handleInputEvent,
+               blink::WebInputEventResult(const blink::WebInputEvent&));
+};
+
+}  // namespace
+
 class InteractiveRenderWidget : public RenderWidget {
  public:
   explicit InteractiveRenderWidget(CompositorDependencies* compositor_deps)
       : RenderWidget(compositor_deps,
                      blink::WebPopupTypeNone,
                      blink::WebScreenInfo(),
                      false,
                      false,
                      false),
         always_overscroll_(false) {
+    webwidget_ = &mock_webwidget_;
     // A RenderWidget is not fully initialized until it has a routing ID.
     SetRoutingID(++next_routing_id_);
   }
 
   void SetTouchRegion(const std::vector<gfx::Rect>& rects) {
     rects_ = rects;
   }
 
   void SendInputEvent(const blink::WebInputEvent& event) {
     OnHandleInputEvent(
         &event, ui::LatencyInfo(),
         WebInputEventTraits::ShouldBlockEventStream(event)
             ? InputEventDispatchType::DISPATCH_TYPE_BLOCKING
             : InputEventDispatchType::DISPATCH_TYPE_NON_BLOCKING);
   }
 
   void set_always_overscroll(bool overscroll) {
     always_overscroll_ = overscroll;
   }
 
   IPC::TestSink* sink() { return &sink_; }
 
+  MockWebWidget& mock_webwidget() { return mock_webwidget_; }
+
  protected:
-  ~InteractiveRenderWidget() override {}
+  ~InteractiveRenderWidget() override { webwidget_ = NULL; }
 
   // Overridden from RenderWidget:
   bool HasTouchEventHandlersAt(const gfx::Point& point) const override {
     for (std::vector<gfx::Rect>::const_iterator iter = rects_.begin();
          iter != rects_.end(); ++iter) {
       if ((*iter).Contains(point))
         return true;
     }
     return false;
   }
@@ skipping 17 matching lines @@
   bool Send(IPC::Message* msg) override {
     sink_.OnMessageReceived(*msg);
     delete msg;
     return true;
   }
 
  private:
   std::vector<gfx::Rect> rects_;
   IPC::TestSink sink_;
   bool always_overscroll_;
+  MockWebWidget mock_webwidget_;
   static int next_routing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(InteractiveRenderWidget);
 };
 
 int InteractiveRenderWidget::next_routing_id_ = 0;
 
 class RenderWidgetUnittest : public testing::Test {
  public:
   RenderWidgetUnittest()
       : widget_(new InteractiveRenderWidget(&compositor_deps_)) {}
   ~RenderWidgetUnittest() override {}
 
   InteractiveRenderWidget* widget() const { return widget_.get(); }
 
+  const base::HistogramTester& histogram_tester() const {
+    return histogram_tester_;
+  }
+
  private:
   MockRenderProcess render_process_;
   MockRenderThread render_thread_;
   FakeCompositorDependencies compositor_deps_;
   scoped_refptr<InteractiveRenderWidget> widget_;
+  base::HistogramTester histogram_tester_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetUnittest);
 };
 
 TEST_F(RenderWidgetUnittest, TouchHitTestSinglePoint) {
   SyntheticWebTouchEvent touch;
   touch.PressPoint(10, 10);
 
+  EXPECT_CALL(widget()->mock_webwidget(), handleInputEvent(::testing::_))

[tdresser, 2016/04/18 19:40:45]

Feel free to "using testing::_".

[dtapuska, 2016/04/18 20:09:09]

Done.

+      .WillRepeatedly(
+          ::testing::Return(blink::WebInputEventResult::NotHandled));
+
   widget()->SendInputEvent(touch);
   ASSERT_EQ(1u, widget()->sink()->message_count());
 
   // Since there's currently no touch-event handling region, the response should
   // be 'no consumer exists'.
   const IPC::Message* message = widget()->sink()->GetMessageAt(0);
   EXPECT_EQ(InputHostMsg_HandleInputEvent_ACK::ID, message->type());
   InputHostMsg_HandleInputEvent_ACK::Param params;
   InputHostMsg_HandleInputEvent_ACK::Read(message, &params);
   InputEventAckState ack_state = base::get<0>(params).state;
   EXPECT_EQ(INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS, ack_state);
   widget()->sink()->ClearMessages();
 
   std::vector<gfx::Rect> rects;
   rects.push_back(gfx::Rect(0, 0, 20, 20));
   rects.push_back(gfx::Rect(25, 0, 10, 10));
   widget()->SetTouchRegion(rects);
 
+  EXPECT_CALL(widget()->mock_webwidget(), handleInputEvent(::testing::_))
+      .WillRepeatedly(
+          ::testing::Return(blink::WebInputEventResult::NotHandled));
+
   widget()->SendInputEvent(touch);
   ASSERT_EQ(1u, widget()->sink()->message_count());
   message = widget()->sink()->GetMessageAt(0);
   EXPECT_EQ(InputHostMsg_HandleInputEvent_ACK::ID, message->type());
   InputHostMsg_HandleInputEvent_ACK::Read(message, &params);
   ack_state = base::get<0>(params).state;
   EXPECT_EQ(INPUT_EVENT_ACK_STATE_NOT_CONSUMED, ack_state);
   widget()->sink()->ClearMessages();
 }
 
 TEST_F(RenderWidgetUnittest, TouchHitTestMultiplePoints) {
   std::vector<gfx::Rect> rects;
   rects.push_back(gfx::Rect(0, 0, 20, 20));
   rects.push_back(gfx::Rect(25, 0, 10, 10));
   widget()->SetTouchRegion(rects);
 
   SyntheticWebTouchEvent touch;
   touch.PressPoint(25, 25);
 
+  EXPECT_CALL(widget()->mock_webwidget(), handleInputEvent(::testing::_))
+      .WillRepeatedly(
+          ::testing::Return(blink::WebInputEventResult::NotHandled));
+
   widget()->SendInputEvent(touch);
   ASSERT_EQ(1u, widget()->sink()->message_count());
 
   // Since there's currently no touch-event handling region, the response should
   // be 'no consumer exists'.
   const IPC::Message* message = widget()->sink()->GetMessageAt(0);
   EXPECT_EQ(InputHostMsg_HandleInputEvent_ACK::ID, message->type());
   InputHostMsg_HandleInputEvent_ACK::Param params;
   InputHostMsg_HandleInputEvent_ACK::Read(message, &params);
   InputEventAckState ack_state = base::get<0>(params).state;
   EXPECT_EQ(INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS, ack_state);
   widget()->sink()->ClearMessages();
 
   // Press a second touch point. This time, on a touch-handling region.
   touch.PressPoint(10, 10);
   widget()->SendInputEvent(touch);
   ASSERT_EQ(1u, widget()->sink()->message_count());
   message = widget()->sink()->GetMessageAt(0);
   EXPECT_EQ(InputHostMsg_HandleInputEvent_ACK::ID, message->type());
   InputHostMsg_HandleInputEvent_ACK::Read(message, &params);
   ack_state = base::get<0>(params).state;
   EXPECT_EQ(INPUT_EVENT_ACK_STATE_NOT_CONSUMED, ack_state);
   widget()->sink()->ClearMessages();
 }
 
 TEST_F(RenderWidgetUnittest, EventOverscroll) {
   widget()->set_always_overscroll(true);
 
+  EXPECT_CALL(widget()->mock_webwidget(), handleInputEvent(::testing::_))
+      .WillRepeatedly(
+          ::testing::Return(blink::WebInputEventResult::NotHandled));
+
   blink::WebGestureEvent scroll;
   scroll.type = blink::WebInputEvent::GestureScrollUpdate;
   scroll.x = -10;
   scroll.data.scrollUpdate.deltaY = 10;
   widget()->SendInputEvent(scroll);
 
   // Overscroll notifications received while handling an input event should
   // be bundled with the event ack IPC.
   ASSERT_EQ(1u, widget()->sink()->message_count());
   const IPC::Message* message = widget()->sink()->GetMessageAt(0);
@@ skipping 22 matching lines @@
   InputHostMsg_DidOverscroll::Param params;
   InputHostMsg_DidOverscroll::Read(message, &params);
   const DidOverscrollParams& overscroll = base::get<0>(params);
   EXPECT_EQ(gfx::Vector2dF(10, 5), overscroll.latest_overscroll_delta);
   EXPECT_EQ(gfx::Vector2dF(5, 5), overscroll.accumulated_overscroll);
   EXPECT_EQ(gfx::PointF(1, 1), overscroll.causal_event_viewport_point);
   EXPECT_EQ(gfx::Vector2dF(-10, -5), overscroll.current_fling_velocity);
   widget()->sink()->ClearMessages();
 }
 
+TEST_F(RenderWidgetUnittest, RenderWidgetInputEventUmaMetrics) {

[tdresser, 2016/04/18 19:40:45]

Thanks for the test - this is great.

[dtapuska, 2016/04/18 20:09:09]

Acknowledged.

+  SyntheticWebTouchEvent touch;
+  touch.PressPoint(10, 10);
+
+  EXPECT_CALL(widget()->mock_webwidget(), handleInputEvent(::testing::_))
+      .Times(4)
+      .WillRepeatedly(
+          ::testing::Return(blink::WebInputEventResult::NotHandled));
+
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(EVENT_LISTENER_RESULT_HISTOGRAM,
+                                       PASSIVE_LISTENER_UMA_ENUM_CANCELABLE, 1);
+
+  touch.dispatchType = blink::WebInputEvent::DispatchType::EventNonBlocking;
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(EVENT_LISTENER_RESULT_HISTOGRAM,
+                                       PASSIVE_LISTENER_UMA_ENUM_UNCANCELABLE,
+                                       1);
+
+  touch.dispatchType =
+      blink::WebInputEvent::DispatchType::ListenersNonBlockingPassive;
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(EVENT_LISTENER_RESULT_HISTOGRAM,
+                                       PASSIVE_LISTENER_UMA_ENUM_PASSIVE, 1);
+
+  touch.dispatchType =
+      blink::WebInputEvent::DispatchType::ListenersForcedNonBlockingPassive;
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(
+      EVENT_LISTENER_RESULT_HISTOGRAM,
+      PASSIVE_LISTENER_UMA_ENUM_FORCED_NON_BLOCKING, 1);
+
+  EXPECT_CALL(widget()->mock_webwidget(), handleInputEvent(::testing::_))
+      .WillOnce(
+          ::testing::Return(blink::WebInputEventResult::HandledSuppressed));
+  touch.dispatchType = blink::WebInputEvent::DispatchType::Blocking;
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(EVENT_LISTENER_RESULT_HISTOGRAM,
+                                       PASSIVE_LISTENER_UMA_ENUM_SUPPRESSED, 1);
+
+  EXPECT_CALL(widget()->mock_webwidget(), handleInputEvent(::testing::_))
+      .WillOnce(
+          ::testing::Return(blink::WebInputEventResult::HandledApplication));
+  touch.dispatchType = blink::WebInputEvent::DispatchType::Blocking;
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(
+      EVENT_LISTENER_RESULT_HISTOGRAM,
+      PASSIVE_LISTENER_UMA_ENUM_CANCELABLE_AND_CANCELED, 1);
+}
+
 }  // namespace content