Introduce the MicButtonTargeter class

ui/app_list/views/speech_view_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/app_list/views/speech_view.h"
+
+#include "ui/app_list/test/app_list_test_view_delegate.h"
+#include "ui/views/test/widget_test.h"
+#include "ui/views/controls/button/image_button.h"
+
+namespace app_list {
+namespace test {
+
+class SpeechViewTest : public views::test::WidgetTest,
+                       public AppListTestViewDelegate {
+ public:
+  SpeechViewTest() {}
+  virtual ~SpeechViewTest() {}
+
+  // Overridden from testing::Test:
+  virtual void SetUp() OVERRIDE {
+    views::test::WidgetTest::SetUp();
+    widget_ = CreateTopLevelPlatformWidget();

[xiyuan, 2014/05/29 20:25:12]

By default, test widget is very small. Give it a big enough size,

e.g.
widget_->SetBounds(gfx::Rect(0, 0, 300, 200));

[tdanderson, 2014/05/29 21:34:23]

Done.

+    view_ = new SpeechView(&view_delegate_);
+    widget_->GetContentsView()->AddChildView(view_);
+    view_->Layout();

[xiyuan, 2014/05/29 20:25:12]

No need to call Layout explicitly. Instead, we should make the SpeechView fill
the content area,

e.g.
view_->SetBoundsRect(widget_->GetContentsView()->GetLocalBounds());

[tdanderson, 2014/05/29 21:34:23]

Done.

+  }
+
+  virtual void TearDown() OVERRIDE {
+    widget_->CloseNow();
+    views::test::WidgetTest::TearDown();
+  }
+
+ protected:
+  SpeechView* view() { return view_; }
+  views::Widget* widget() { return widget_; }
+
+  int GetToggleSpeechRecognitionCountAndReset() {
+    return view_delegate_.GetToggleSpeechRecognitionCountAndReset();
+  }
+
+ private:
+  AppListTestViewDelegate view_delegate_;
+  views::Widget* widget_;
+  SpeechView* view_;
+
+  DISALLOW_COPY_AND_ASSIGN(SpeechViewTest);
+};
+
+TEST_F(SpeechViewTest, Basic) {
+  EXPECT_EQ(0, GetToggleSpeechRecognitionCountAndReset());
+  gfx::Rect screen_bounds(view()->mic_button()->GetBoundsInScreen());
+
+  ui::MouseEvent press(ui::ET_MOUSE_PRESSED, screen_bounds.CenterPoint(), screen_bounds.CenterPoint(), 0, 0);

[xiyuan, 2014/05/29 20:25:12]

The mouse event should have ui::EF_LEFT_MOUSE_BUTTON in its flags. Otherwise,
button click does not fire.

[tdanderson, 2014/05/29 21:34:23]

Done.

+  ui::MouseEvent release(ui::ET_MOUSE_RELEASED, screen_bounds.CenterPoint(), screen_bounds.CenterPoint(), 0, 0);
+  widget()->OnMouseEvent(&press);
+  widget()->OnMouseEvent(&release);
+
+  EXPECT_EQ(1, GetToggleSpeechRecognitionCountAndReset());
+}
+
+}  // namespace test
+}  // namespace app_list