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

ui/views/event_monitor_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 "ui/events/test/event_generator.h"
+#include "ui/events/test/test_event_handler.h"
+#include "ui/views/event_monitor.h"
+#include "ui/views/test/widget_test.h"
+
+namespace views {
+namespace test {
+
+class EventMonitorTest : public WidgetTest {
+ public:
+  EventMonitorTest() : widget_(nullptr) {}
+
+  // testing::Test:
+  void SetUp() override {
+    WidgetTest::SetUp();
+    widget_ = CreateTopLevelNativeWidget();
+    widget_->SetSize(gfx::Size(100, 100));
+    widget_->Show();
+    generator_.reset(
+        new ui::test::EventGenerator(GetContext(), widget_->GetNativeWindow()));
+    generator_->set_targeting_application(true);
+  }
+  void TearDown() override {
+    widget_->CloseNow();
+    WidgetTest::TearDown();
+  }
+
+ protected:
+  Widget* widget_;
+  scoped_ptr<ui::test::EventGenerator> generator_;
+  ui::test::TestEventHandler handler_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(EventMonitorTest);
+};
+
+TEST_F(EventMonitorTest, ShouldReceiveAppEventsWhileInstalled) {
+  scoped_ptr<EventMonitor> monitor(
+      EventMonitor::CreateApplicationMonitor(&handler_));
+
+  generator_->ClickLeftButton();
+  EXPECT_EQ(2, handler_.num_mouse_events());
+
+  monitor.reset();
+  generator_->ClickLeftButton();
+  EXPECT_EQ(2, handler_.num_mouse_events());
+}
+
+TEST_F(EventMonitorTest, ShouldReceiveWindowEventsWhileInstalled) {
+  scoped_ptr<EventMonitor> monitor(
+      EventMonitor::CreateWindowMonitor(&handler_, widget_->GetNativeWindow()));
+
+  generator_->ClickLeftButton();
+  EXPECT_EQ(2, handler_.num_mouse_events());
+
+  monitor.reset();
+  generator_->ClickLeftButton();
+  EXPECT_EQ(2, handler_.num_mouse_events());
+}
+
+TEST_F(EventMonitorTest, ShouldNotReceiveEventsFromOtherWindow) {
+  Widget* widget2 = CreateTopLevelNativeWidget();
+  scoped_ptr<EventMonitor> monitor(
+      EventMonitor::CreateWindowMonitor(&handler_, widget2->GetNativeWindow()));
+
+  generator_->ClickLeftButton();
+  EXPECT_EQ(0, handler_.num_mouse_events());
+
+  monitor.reset();
+  widget2->CloseNow();
+}
+
+}  // namespace test
+}  // namespace views