Routes touch ACK events to the correct GestureProvider

ui/aura/gestures/gesture_recognizer_unittest.cc

 // Copyright (c) 2012 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 <stdint.h>
 
 #include <list>
 
 #include "base/command_line.h"
 #include "base/location.h"
@@ skipping 4672 matching lines @@
   EXPECT_FALSE(queued_delegate2->scroll_update());
   EXPECT_FALSE(queued_delegate2->scroll_end());
   EXPECT_FALSE(queued_delegate2->long_press());
 
   queued_delegate->Reset();
   queued_delegate->WaitUntilReceivedGesture(ui::ET_GESTURE_SHOW_PRESS);
   EXPECT_TRUE(queued_delegate->show_press());
   EXPECT_FALSE(queued_delegate->tap_down());
 }
 
+// Test for crbug/698843. Checks whether the events are routed to the correct
+// consumer in the event of TransferEventsTo() function call.
+TEST_F(GestureRecognizerTest, TransferEventsToRoutesAckCorrectly) {
+  std::unique_ptr<QueueTouchEventDelegate> delegate_1(
+      new QueueTouchEventDelegate(host()->dispatcher()));
+  TimedEvents tes;
+  const int kTouchId = 7;
+  gfx::Rect bounds(0, 0, 1000, 1000);
+
+  std::unique_ptr<aura::Window> window_1(CreateTestWindowWithDelegate(
+      delegate_1.get(), -1234, bounds, root_window()));
+
+  delegate_1->set_window(window_1.get());
+
+  delegate_1->Reset();
+  ui::TouchEvent press(
+      ui::ET_TOUCH_PRESSED, gfx::Point(512, 512), tes.Now(),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, kTouchId));
+  DispatchEventUsingWindowDispatcher(&press);
+  delegate_1->ReceivedAck();
+
+  EXPECT_2_EVENTS(delegate_1->events(), ui::ET_GESTURE_BEGIN,
+                  ui::ET_GESTURE_TAP_DOWN);
+
+  ui::TouchEvent move(
+      ui::ET_TOUCH_MOVED, gfx::Point(530, 512), tes.Now(),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, kTouchId));
+
+  DispatchEventUsingWindowDispatcher(&move);
+
+  // Send a second move event to scroll.
+  ui::TouchEvent move2(
+      ui::ET_TOUCH_MOVED, gfx::Point(550, 512), tes.Now(),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, kTouchId));
+  DispatchEventUsingWindowDispatcher(&move2);

[tdresser, 2017/04/06 20:59:52]

Does the test need this second move?

For that matter, does it need the first move?

[malaykeshav, 2017/04/07 01:07:59]

Removed.

+
+  // Create a new consumer and Touch event delegate.
+  std::unique_ptr<QueueTouchEventDelegate> delegate_2(
+      new QueueTouchEventDelegate(host()->dispatcher()));
+  std::unique_ptr<aura::Window> window_2(CreateTestWindowWithDelegate(
+      delegate_2.get(), -2345, bounds, root_window()));
+  delegate_2->set_window(window_2.get());
+
+  // Transfer event sequence from previous window to the new window.
+  ui::GestureRecognizer::Get()->TransferEventsTo(
+      window_1.get(), window_2.get(),
+      ui::GestureRecognizer::ShouldCancelTouches::DontCancel);
+
+  delegate_1->Reset();
+  delegate_1->ReceivedAck();
+  // ACK for events that were dispatched before the trasnfer should go to the

[tdresser, 2017/04/06 20:59:52]

trasnfer -> transfer

[malaykeshav, 2017/04/07 01:07:59]

Done

+  // original consumer. See crbug/698843 for more details.
+  EXPECT_3_EVENTS(delegate_1->events(), ui::ET_GESTURE_TAP_CANCEL,
+                  ui::ET_GESTURE_SCROLL_BEGIN, ui::ET_GESTURE_SCROLL_UPDATE);
+
+  delegate_1->Reset();
+  delegate_1->ReceivedAck();
+  EXPECT_1_EVENT(delegate_1->events(), ui::ET_GESTURE_SCROLL_UPDATE);
+
+  delegate_1->Reset();
+  ui::TouchEvent release(
+      ui::ET_TOUCH_RELEASED, gfx::Point(550, 512), tes.LeapForward(50),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, kTouchId));
+  DispatchEventUsingWindowDispatcher(&release);
+
+  // Events dispatched after the transfer should go to the new window.
+  EXPECT_0_EVENTS(delegate_1->events());
+
+  delegate_2->ReceivedAck();
+  // The event sequence transfer should mean that the new window receives the
+  // gesture sequence state.
+  EXPECT_2_EVENTS(delegate_2->events(), ui::ET_GESTURE_SCROLL_END,
+                  ui::ET_GESTURE_END);
+
+  EXPECT_TRUE(delegate_2->scroll_end());
+}
+
 }  // namespace test
 }  // namespace aura