Make HostZoomMap play nicely with preference sync.

Review URL: http://codereview.chromium.org/1560023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@44056 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 110 insertions, 0 deletions

diff --git a/chrome/browser/host_zoom_map_unittest.cc b/chrome/browser/host_zoom_map_unittest.cc
new file mode 100644
index 0000000..fb7b52d
--- /dev/null
+++ b/chrome/browser/host_zoom_map_unittest.cc
@@ -0,0 +1,110 @@
+// Copyright (c) 2010 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.h"
+#include "base/ref_counted.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/browser/host_zoom_map.h"
+#include "chrome/browser/pref_service.h"
+#include "chrome/common/notification_details.h"
+#include "chrome/common/notification_observer_mock.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/notification_service.h"
+#include "chrome/common/notification_type.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/test/testing_profile.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::_;
+using testing::Pointee;
+using testing::Property;
+
+class HostZoomMapTest : public testing::Test {
+ public:
+  static const int kZoomLevel;
+  HostZoomMapTest()
+      : ui_thread_(ChromeThread::UI, &message_loop_),
+        prefs_(profile_.GetPrefs()),
+        per_host_zoom_levels_pref_(prefs::kPerHostZoomLevels),
+        host_name_("http://example/com/") {}
+
+ protected:
+  void SetPrefObserverExpectation() {
+    EXPECT_CALL(
+        pref_observer_,
+        Observe(NotificationType(NotificationType::PREF_CHANGED),
+                _,
+                Property(&Details<std::wstring>::ptr,
+                         Pointee(per_host_zoom_levels_pref_))));
+  }
+
+  MessageLoopForUI message_loop_;
+  ChromeThread ui_thread_;
+  TestingProfile profile_;
+  PrefService* prefs_;
+  std::wstring per_host_zoom_levels_pref_;  // For the observe matcher.
+  std::string host_name_;
+  NotificationObserverMock pref_observer_;
+};
+const int HostZoomMapTest::kZoomLevel = 42;
+
+TEST_F(HostZoomMapTest, LoadNoPrefs) {
+  scoped_refptr<HostZoomMap> map(new HostZoomMap(&profile_));
+  EXPECT_EQ(0, map->GetZoomLevel(host_name_));
+}
+
+TEST_F(HostZoomMapTest, Load) {
+  DictionaryValue* dict =
+      prefs_->GetMutableDictionary(prefs::kPerHostZoomLevels);
+  dict->SetWithoutPathExpansion(UTF8ToWide(host_name_),
+                                Value::CreateIntegerValue(kZoomLevel));
+  scoped_refptr<HostZoomMap> map(new HostZoomMap(&profile_));
+  EXPECT_EQ(kZoomLevel, map->GetZoomLevel(host_name_));
+}
+
+TEST_F(HostZoomMapTest, SetZoomLevel) {
+  scoped_refptr<HostZoomMap> map(new HostZoomMap(&profile_));
+  prefs_->AddPrefObserver(prefs::kPerHostZoomLevels, &pref_observer_);
+  SetPrefObserverExpectation();
+  map->SetZoomLevel(host_name_, kZoomLevel);
+  EXPECT_EQ(kZoomLevel, map->GetZoomLevel(host_name_));
+  const DictionaryValue* dict =
+      prefs_->GetDictionary(prefs::kPerHostZoomLevels);
+  int zoom_level = 0;
+  EXPECT_TRUE(dict->GetIntegerWithoutPathExpansion(UTF8ToWide(host_name_),
+                                                   &zoom_level));
+  EXPECT_EQ(kZoomLevel, zoom_level);
+
+  SetPrefObserverExpectation();
+  map->SetZoomLevel(host_name_, 0);
+  EXPECT_EQ(0, map->GetZoomLevel(host_name_));
+  EXPECT_FALSE(dict->HasKey(UTF8ToWide(host_name_)));
+  prefs_->RemovePrefObserver(prefs::kPerHostZoomLevels, &pref_observer_);
+}
+
+TEST_F(HostZoomMapTest, ResetToDefaults) {
+  scoped_refptr<HostZoomMap> map(new HostZoomMap(&profile_));
+  map->SetZoomLevel(host_name_, kZoomLevel);
+
+  prefs_->AddPrefObserver(prefs::kPerHostZoomLevels, &pref_observer_);
+  SetPrefObserverExpectation();
+  map->ResetToDefaults();
+  EXPECT_EQ(0, map->GetZoomLevel(host_name_));
+  EXPECT_EQ(NULL, prefs_->GetDictionary(prefs::kPerHostZoomLevels));
+  prefs_->RemovePrefObserver(prefs::kPerHostZoomLevels, &pref_observer_);
+}
+
+TEST_F(HostZoomMapTest, ReloadOnPrefChange) {
+  scoped_refptr<HostZoomMap> map(new HostZoomMap(&profile_));
+  map->SetZoomLevel(host_name_, kZoomLevel);
+
+  DictionaryValue dict;
+  dict.SetWithoutPathExpansion(UTF8ToWide(host_name_),
+                               Value::CreateIntegerValue(0));
+  prefs_->Set(prefs::kPerHostZoomLevels, dict);
+  EXPECT_EQ(0, map->GetZoomLevel(host_name_));
+}