1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/prefs/default_pref_store.h" 6 #include "testing/gtest/include/gtest/gtest.h" 7 8 using base::StringValue; 9 using base::Value; 10 11 namespace { 12 13 class MockPrefStoreObserver : public PrefStore::Observer { 14 public: 15 explicit MockPrefStoreObserver(DefaultPrefStore* pref_store); 16 virtual ~MockPrefStoreObserver(); 17 change_count()18 int change_count() { 19 return change_count_; 20 } 21 22 // PrefStore::Observer implementation: 23 virtual void OnPrefValueChanged(const std::string& key) OVERRIDE; OnInitializationCompleted(bool succeeded)24 virtual void OnInitializationCompleted(bool succeeded) OVERRIDE {} 25 26 private: 27 DefaultPrefStore* pref_store_; 28 29 int change_count_; 30 31 DISALLOW_COPY_AND_ASSIGN(MockPrefStoreObserver); 32 }; 33 MockPrefStoreObserver(DefaultPrefStore * pref_store)34MockPrefStoreObserver::MockPrefStoreObserver(DefaultPrefStore* pref_store) 35 : pref_store_(pref_store), change_count_(0) { 36 pref_store_->AddObserver(this); 37 } 38 ~MockPrefStoreObserver()39MockPrefStoreObserver::~MockPrefStoreObserver() { 40 pref_store_->RemoveObserver(this); 41 } 42 OnPrefValueChanged(const std::string & key)43void MockPrefStoreObserver::OnPrefValueChanged(const std::string& key) { 44 change_count_++; 45 } 46 47 } // namespace 48 TEST(DefaultPrefStoreTest,NotifyPrefValueChanged)49TEST(DefaultPrefStoreTest, NotifyPrefValueChanged) { 50 scoped_refptr<DefaultPrefStore> pref_store(new DefaultPrefStore); 51 MockPrefStoreObserver observer(pref_store.get()); 52 std::string kPrefKey("pref_key"); 53 54 // Setting a default value shouldn't send a change notification. 55 pref_store->SetDefaultValue(kPrefKey, 56 scoped_ptr<Value>(new StringValue("foo"))); 57 EXPECT_EQ(0, observer.change_count()); 58 59 // Replacing the default value should send a change notification... 60 pref_store->ReplaceDefaultValue(kPrefKey, 61 scoped_ptr<Value>(new StringValue("bar"))); 62 EXPECT_EQ(1, observer.change_count()); 63 64 // But only if the value actually changed. 65 pref_store->ReplaceDefaultValue(kPrefKey, 66 scoped_ptr<Value>(new StringValue("bar"))); 67 EXPECT_EQ(1, observer.change_count()); 68 } 69 70