ozone: evdev: Fix possibility of stuck keys

ui/events/ozone/evdev/event_converter_evdev_impl_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 <linux/input.h>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 109 matching lines @@
     DCHECK(ev->IsKeyEvent());
     return static_cast<ui::KeyEvent*>(ev);
   }
   ui::MouseEvent* dispatched_mouse_event(unsigned index) {
     DCHECK_GT(dispatched_events_.size(), index);
     ui::Event* ev = dispatched_events_[index];
     DCHECK(ev->IsMouseEvent());
     return static_cast<ui::MouseEvent*>(ev);
   }
 
+  void DestroyDevice() { device_.reset(); }
+
  private:
   void DispatchEventForTest(ui::Event* event) {
     scoped_ptr<ui::Event> cloned_event = ui::Event::Clone(*event);
     dispatched_events_.push_back(cloned_event.release());
   }
 
   base::MessageLoopForUI ui_loop_;
 
   scoped_ptr<ui::MockCursorEvdev> cursor_;
   scoped_ptr<ui::DeviceManager> device_manager_;
@@ skipping 273 matching lines @@
       {{0, 0}, EV_KEY, BTN_TOUCH, 1},
       {{0, 0}, EV_SYN, SYN_REPORT, 0},
 
       {{0, 0}, EV_KEY, BTN_TOUCH, 0},
       {{0, 0}, EV_SYN, SYN_REPORT, 0},
   };
 
   dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
   EXPECT_EQ(0u, size());
 }
+
+TEST_F(EventConverterEvdevImplTest, ShouldReleaseKeysOnUnplug) {
+  ui::MockEventConverterEvdevImpl* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_KEY, KEY_A, 1},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(1u, size());
+
+  DestroyDevice();
+  EXPECT_EQ(2u, size());
+
+  ui::KeyEvent* event = dispatched_event(0);
+  EXPECT_EQ(ui::ET_KEY_PRESSED, event->type());
+  EXPECT_EQ(ui::VKEY_A, event->key_code());
+
+  event = dispatched_event(1);
+  EXPECT_EQ(ui::ET_KEY_RELEASED, event->type());
+  EXPECT_EQ(ui::VKEY_A, event->key_code());
+}
+
+TEST_F(EventConverterEvdevImplTest, ShouldReleaseKeysOnSynDropped) {
+  ui::MockEventConverterEvdevImpl* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_KEY, KEY_A, 1},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+
+      {{0, 0}, EV_SYN, SYN_DROPPED, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(2u, size());
+
+  ui::KeyEvent* event = dispatched_event(0);
+  EXPECT_EQ(ui::ET_KEY_PRESSED, event->type());
+  EXPECT_EQ(ui::VKEY_A, event->key_code());
+
+  event = dispatched_event(1);
+  EXPECT_EQ(ui::ET_KEY_RELEASED, event->type());
+  EXPECT_EQ(ui::VKEY_A, event->key_code());
+}