Zoom Extension API (chrome)

chrome/browser/ui/zoom/zoom_controller_unittest.cc

 // 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 "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/zoom/zoom_controller.h"
 #include "chrome/browser/ui/zoom/zoom_observer.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "content/public/test/test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+bool operator==(const ZoomController::ZoomChangedEventData& lhs,
+                const ZoomController::ZoomChangedEventData& rhs) {
+  return lhs.web_contents == rhs.web_contents &&
+         lhs.old_zoom_level == rhs.old_zoom_level &&
+         lhs.new_zoom_level == rhs.new_zoom_level &&
+         lhs.zoom_mode == rhs.zoom_mode &&
+         lhs.can_show_bubble == rhs.can_show_bubble;
+}
+
 class TestZoomObserver : public ZoomObserver {
  public:
-  MOCK_METHOD2(OnZoomChanged, void(content::WebContents*, bool));
+  MOCK_METHOD1(OnZoomChanged,
+               void(const ZoomController::ZoomChangedEventData&));
 };
 
 class ZoomControllerTest : public ChromeRenderViewHostTestHarness {
  public:
   virtual void SetUp() OVERRIDE {
     ChromeRenderViewHostTestHarness::SetUp();
     zoom_controller_.reset(new ZoomController(web_contents()));
-    zoom_controller_->set_observer(&zoom_observer_);
+    zoom_controller_->AddObserver(&zoom_observer_);
   }
 
   virtual void TearDown() OVERRIDE {
+    zoom_controller_->RemoveObserver(&zoom_observer_);
     zoom_controller_.reset();
     ChromeRenderViewHostTestHarness::TearDown();
   }
 
  protected:
   scoped_ptr<ZoomController> zoom_controller_;
   TestZoomObserver zoom_observer_;
 };
 
 TEST_F(ZoomControllerTest, DidNavigateMainFrame) {
-  EXPECT_CALL(zoom_observer_, OnZoomChanged(web_contents(), false)).Times(1);
+  double zoom_level = zoom_controller_->GetZoomLevel();
+  ZoomController::ZoomChangedEventData zoom_change_data(
+      web_contents(),
+      zoom_level,
+      zoom_level,
+      ZoomController::ZOOM_MODE_DEFAULT,
+      false);
+  EXPECT_CALL(zoom_observer_, OnZoomChanged(zoom_change_data)).Times(1);
   zoom_controller_->DidNavigateMainFrame(content::LoadCommittedDetails(),
                                          content::FrameNavigateParams());
 }
 
 TEST_F(ZoomControllerTest, OnPreferenceChanged) {
-  EXPECT_CALL(zoom_observer_, OnZoomChanged(web_contents(), false)).Times(1);
-  profile()->GetPrefs()->SetDouble(prefs::kDefaultZoomLevel, 110.0f);
+  double zoom_level = zoom_controller_->GetZoomLevel();
+  // Note that while the change in the default zoom level triggers an event,
+  // the current zoom level for this web contents does not change since the
+  // default zoom level in HostZoomMap is not updated.
+  // TODO(wjmaclean) Make sure changes to the default zoom level in preferences
+  // propagate to HostZoomMap. http://crbug.com/391484
+  ZoomController::ZoomChangedEventData zoom_change_data(
+      web_contents(),
+      zoom_level,
+      zoom_level,
+      ZoomController::ZOOM_MODE_DEFAULT,
+      false);
+  EXPECT_CALL(zoom_observer_, OnZoomChanged(zoom_change_data)).Times(1);
+  profile()->GetPrefs()->SetDouble(prefs::kDefaultZoomLevel, 110.0);
 }
 
 TEST_F(ZoomControllerTest, Observe) {
-  EXPECT_CALL(zoom_observer_, OnZoomChanged(web_contents(), false)).Times(1);
+  double new_zoom_level = 110.0;
+  // When the event is initiated from HostZoomMap, the old zoom level is not
+  // available.
+  ZoomController::ZoomChangedEventData zoom_change_data(
+      web_contents(),
+      new_zoom_level,
+      new_zoom_level,
+      ZoomController::ZOOM_MODE_DEFAULT,
+      false);
+  EXPECT_CALL(zoom_observer_, OnZoomChanged(zoom_change_data)).Times(1);
 
   content::HostZoomMap* host_zoom_map =
       content::HostZoomMap::GetForBrowserContext(
           web_contents()->GetBrowserContext());
 
-  host_zoom_map->SetZoomLevelForHost(std::string(), 110.0f);
+  host_zoom_map->SetZoomLevelForHost(std::string(), new_zoom_level);
 }
+
+TEST_F(ZoomControllerTest, Observe_ZoomController) {
+  double old_zoom_level = zoom_controller_->GetZoomLevel();
+  double new_zoom_level = 110.0;
+
+  ZoomController::ZoomChangedEventData zoom_change_data1(
+      web_contents(),
+      old_zoom_level,
+      old_zoom_level,
+      ZoomController::ZOOM_MODE_ISOLATED,
+      true /* can_show_bubble */);
+  EXPECT_CALL(zoom_observer_, OnZoomChanged(zoom_change_data1)).Times(1);
+
+  zoom_controller_->SetZoomMode(ZoomController::ZOOM_MODE_ISOLATED);
+
+  ZoomController::ZoomChangedEventData zoom_change_data2(
+      web_contents(),
+      old_zoom_level,
+      new_zoom_level,
+      ZoomController::ZOOM_MODE_ISOLATED,
+      true /* can_show_bubble */);
+  EXPECT_CALL(zoom_observer_, OnZoomChanged(zoom_change_data2)).Times(1);
+
+  zoom_controller_->SetZoomLevel(new_zoom_level);
+}