Add unittest for MessageListView

ui/message_center/views/message_list_view_unittest.cc

Index: ui/message_center/views/message_list_view_unittest.cc
diff --git a/ui/message_center/views/message_list_view_unittest.cc b/ui/message_center/views/message_list_view_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..895f0435092e9c029d33912b5d5c9cda6c2974aa
--- /dev/null
+++ b/ui/message_center/views/message_list_view_unittest.cc
@@ -0,0 +1,185 @@
+// Copyright 2016 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 <map>
+#include <memory>
+#include <utility>
+
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/message_center/fake_message_center.h"
+#include "ui/message_center/notification.h"
+#include "ui/message_center/notification_list.h"
+#include "ui/message_center/views/message_center_controller.h"
+#include "ui/message_center/views/message_list_view.h"
+#include "ui/message_center/views/notification_view.h"
+#include "ui/views/test/views_test_base.h"
+
+namespace message_center {
+
+static const char* kNotificationId1 = "notification id 1";
+
+namespace {
+
+/* Types **********************************************************************/
+
+enum CallType { GET_PREFERRED_SIZE, GET_HEIGHT_FOR_WIDTH, LAYOUT };
+
+/* Instrumented/Mock NotificationView subclass ********************************/
+
+class MockNotificationView : public NotificationView {
+ public:
+  class Test {
+   public:
+    virtual void RegisterCall(CallType type) = 0;
+  };
+
+  MockNotificationView(MessageCenterController* controller,
+                       const Notification& notification,
+                       Test* test);
+  ~MockNotificationView() override;
+
+  gfx::Size GetPreferredSize() const override;
+  int GetHeightForWidth(int w) const override;
+  void Layout() override;
+
+ private:
+  Test* test_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockNotificationView);
+};
+
+MockNotificationView::MockNotificationView(MessageCenterController* controller,
+                                           const Notification& notification,
+                                           Test* test)
+    : NotificationView(controller, notification), test_(test) {}
+
+MockNotificationView::~MockNotificationView() {}
+
+gfx::Size MockNotificationView::GetPreferredSize() const {
+  test_->RegisterCall(GET_PREFERRED_SIZE);
+  DCHECK(child_count() > 0);
+  return NotificationView::GetPreferredSize();
+}
+
+int MockNotificationView::GetHeightForWidth(int width) const {
+  test_->RegisterCall(GET_HEIGHT_FOR_WIDTH);
+  DCHECK(child_count() > 0);
+  return NotificationView::GetHeightForWidth(width);
+}
+
+void MockNotificationView::Layout() {
+  test_->RegisterCall(LAYOUT);
+  DCHECK(child_count() > 0);
+  NotificationView::Layout();
+}
+
+}  // anonymous namespace
+
+/* Test fixture ***************************************************************/
+
+class MessageListViewTest : public views::ViewsTestBase,
+                            public MockNotificationView::Test,
+                            public MessageListView::Observer,
+                            public MessageCenterController {
+ public:
+  MessageListViewTest() {}
+
+  ~MessageListViewTest() override {}
+
+  void SetUp() override {
+    views::ViewsTestBase::SetUp();
+
+    message_list_view_.reset(new MessageListView(false /* top_down */));
+    message_list_view_->AddObserver(this);
+    message_list_view_->set_owned_by_client();
+
+    widget_.reset(new views::Widget());
+    views::Widget::InitParams params =
+        CreateParams(views::Widget::InitParams::TYPE_POPUP);
+    params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+    params.bounds = gfx::Rect(50, 50, 650, 650);
+    widget_->Init(params);
+    views::View* root = widget_->GetRootView();
+    root->AddChildView(message_list_view_.get());
+    widget_->Show();
+    widget_->Activate();
+  }
+
+  void TearDown() override {
+    widget_->CloseNow();
+    widget_.reset();
+
+    message_list_view_->RemoveObserver(this);
+    message_list_view_.reset();
+
+    views::ViewsTestBase::TearDown();
+  }
+
+ protected:
+  MessageListView* message_list_view() const {
+    return message_list_view_.get();
+  }
+
+  MockNotificationView* CreateNotificationView(
+      const Notification& notification) {
+    return new MockNotificationView(this, notification, this);
+  }
+
+ private:
+  // MockNotificationView::Test override
+  void RegisterCall(CallType type) override {}
+
+  // MessageListView::Observer override
+  void OnAllNotificationsCleared() override {}
+
+  // MessageCenterController override:
+  void ClickOnNotification(const std::string& notification_id) override {}
+  void RemoveNotification(const std::string& notification_id,
+                          bool by_user) override {}
+  std::unique_ptr<ui::MenuModel> CreateMenuModel(
+      const NotifierId& notifier_id,
+      const base::string16& display_source) override {
+    NOTREACHED();
+    return nullptr;
+  }
+  bool HasClickedListener(const std::string& notification_id) override {
+    return false;
+  }
+  void ClickOnNotificationButton(const std::string& notification_id,
+                                 int button_index) override {}
+  void ClickOnSettingsButton(const std::string& notification_id) override {}
+
+  // Widget to host a MessageListView.
+  std::unique_ptr<views::Widget> widget_;
+  // MessageListView to be tested.
+  std::unique_ptr<MessageListView> message_list_view_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessageListViewTest);
+};
+
+/* Unit tests *****************************************************************/
+
+TEST_F(MessageListViewTest, AddNotification) {
+  // Create a dummy notification.
+  auto notification_view = CreateNotificationView(
+      Notification(NOTIFICATION_TYPE_SIMPLE, std::string(kNotificationId1),
+                   base::UTF8ToUTF16("title"), base::UTF8ToUTF16("message1"),
+                   gfx::Image(), base::UTF8ToUTF16("display source"), GURL(),
+                   NotifierId(NotifierId::APPLICATION, "extension_id"),
+                   message_center::RichNotificationData(), nullptr));
+
+  EXPECT_EQ(0, message_list_view()->child_count());
+  EXPECT_FALSE(message_list_view()->Contains(notification_view));
+
+  // Add a notification.
+  message_list_view()->AddNotificationAt(notification_view, 0);
+
+  EXPECT_EQ(1, message_list_view()->child_count());
+  EXPECT_TRUE(message_list_view()->Contains(notification_view));
+}
+
+}  // namespace