Add LauncherIconObserver.

ash/launcher/launcher_view_unittest.cc

Index: ash/launcher/launcher_view_unittest.cc
diff --git a/ash/launcher/launcher_view_unittest.cc b/ash/launcher/launcher_view_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..78836f62e7c565d4e273cddf2f7cba30a86b4b50
--- /dev/null
+++ b/ash/launcher/launcher_view_unittest.cc
@@ -0,0 +1,104 @@
+// 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 "ash/launcher/launcher_view.h"
+
+#include "ash/ash_switches.h"
+#include "ash/launcher/launcher.h"
+#include "ash/launcher/launcher_icon_observer.h"
+#include "ash/shell.h"
+#include "ash/shell_window_ids.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/test/test_launcher_delegate.h"
+#include "base/basictypes.h"
+#include "base/command_line.h"
+#include "base/compiler_specific.h"
+#include "ui/aura/window.h"
+#include "ui/views/widget/widget.h"
+#include "ui/views/widget/widget_delegate.h"
+
+namespace ash {
+
+namespace {
+
+class TestLauncherIconObserver : public LauncherIconObserver {
+ public:
+  TestLauncherIconObserver() : count_(0) {
+    Shell::GetInstance()->launcher()->AddIconObserver(this);
+  }
+
+  virtual ~TestLauncherIconObserver() {
+    Shell::GetInstance()->launcher()->RemoveIconObserver(this);
+  }
+
+  // LauncherIconObserver implementation.
+  void OnLauncherIconPositionsChanged() OVERRIDE {
+    count_++;
+  }
+
+  int count() const { return count_; }
+  void Reset() { count_ = 0; }
+
+ private:
+  int count_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestLauncherIconObserver);
+};
+
+class LauncherViewTest : public ash::test::AshTestBase {
+ public:
+  LauncherViewTest() {}
+  virtual ~LauncherViewTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    AshTestBase::SetUp();
+    observer_.reset(new TestLauncherIconObserver);
+  }
+
+  virtual void TearDown() OVERRIDE {
+    observer_.reset();
+    AshTestBase::TearDown();
+  }
+
+  TestLauncherIconObserver* observer() { return observer_.get(); }
+
+ private:
+  scoped_ptr<TestLauncherIconObserver> observer_;
+
+  DISALLOW_COPY_AND_ASSIGN(LauncherViewTest);
+};
+
+TEST_F(LauncherViewTest, AddRemove) {
+  ash::test::TestLauncherDelegate* launcher_delegate =
+      ash::test::TestLauncherDelegate::instance();
+  ASSERT_TRUE(launcher_delegate);
+
+  views::Widget::InitParams params(views::Widget::InitParams::TYPE_WINDOW);
+  params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  params.bounds = gfx::Rect(0, 0, 200, 200);
+
+  scoped_ptr<views::Widget> widget(new views::Widget());
+  widget->Init(params);
+  launcher_delegate->AddLauncherItem(widget->GetNativeWindow());
+  EXPECT_EQ(1, observer()->count());
+  observer()->Reset();
+
+  widget->Show();
+  widget->GetNativeWindow()->parent()->RemoveChild(widget->GetNativeWindow());
+  EXPECT_EQ(1, observer()->count());
+  observer()->Reset();
+}
+
+TEST_F(LauncherViewTest, BoundsChanged) {
+  Launcher* launcher = Shell::GetInstance()->launcher();
+  int total_width = launcher->widget()->GetWindowScreenBounds().width();
+  ASSERT_GT(total_width, 0);
+  launcher->SetStatusWidth(total_width / 2);
+  EXPECT_EQ(1, observer()->count());
+  observer()->Reset();
+}
+
+}  // namespace
+
+}  // namespace ash