MacViews: Implement event monitoring for a specific window (Reland)

ui/views/event_monitor_mac_unittest.mm

-// 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 "ui/views/event_monitor_mac.h"
-
-#include "ui/events/event.h"
-#include "ui/events/event_handler.h"
-#include "ui/events/event_constants.h"
-#import "ui/events/test/cocoa_test_event_utils.h"
-#import "ui/gfx/test/ui_cocoa_test_helper.h"
-
-namespace views {
-
-namespace {
-
-class EventMonitorMacTest : public ui::CocoaTest {
- public:
-  EventMonitorMacTest() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(EventMonitorMacTest);
-};
-
-class EventCounter : public ui::EventHandler {
- public:
-   EventCounter() : event_count_(0), last_event_type_(ui::ET_UNKNOWN) {}
-   int event_count() const { return event_count_; }
-   ui::EventType last_event_type() { return last_event_type_; }
-
-  // ui::EventHandler implementation:
-  virtual void OnEvent(ui::Event* event) override {
-    ++event_count_;
-    last_event_type_ = event->type();
-  }
-
- private:
-  int event_count_;
-  ui::EventType last_event_type_;
-};
-
-}  // namespace
-
-TEST_F(EventMonitorMacTest, CountEvents) {
-  EventCounter counter;
-  NSEvent* event =
-      cocoa_test_event_utils::EnterExitEventWithType(NSMouseExited);
-
-  // No monitor installed yet, should not receive events.
-  [NSApp sendEvent:event];
-  EXPECT_EQ(0, counter.event_count());
-  EXPECT_EQ(ui::ET_UNKNOWN, counter.last_event_type());
-
-  // Install monitor, should start receiving event.
-  scoped_ptr<EventMonitor> event_monitor(EventMonitor::Create(&counter));
-  [NSApp sendEvent:event];
-  EXPECT_EQ(1, counter.event_count());
-  EXPECT_EQ(ui::ET_MOUSE_EXITED, counter.last_event_type());
-
-  // Uninstall monitor, should stop receiving events.
-  event_monitor.reset();
-  [NSApp sendEvent:event];
-  EXPECT_EQ(1, counter.event_count());
-  EXPECT_EQ(ui::ET_MOUSE_EXITED, counter.last_event_type());
-}
-
-}  // namespace views