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 #ifndef BASE_PREFS_TESTING_PREF_SERVICE_H_ 6 #define BASE_PREFS_TESTING_PREF_SERVICE_H_ 7 8 #include "base/memory/ref_counted.h" 9 #include "base/memory/scoped_ptr.h" 10 #include "base/prefs/pref_registry.h" 11 #include "base/prefs/pref_service.h" 12 #include "base/prefs/testing_pref_store.h" 13 14 class PrefNotifierImpl; 15 class PrefRegistrySimple; 16 class TestingPrefStore; 17 18 // A PrefService subclass for testing. It operates totally in memory and 19 // provides additional API for manipulating preferences at the different levels 20 // (managed, extension, user) conveniently. 21 // 22 // Use this via its specializations, e.g. TestingPrefServiceSimple. 23 template <class SuperPrefService, class ConstructionPrefRegistry> 24 class TestingPrefServiceBase : public SuperPrefService { 25 public: 26 virtual ~TestingPrefServiceBase(); 27 28 // Read the value of a preference from the managed layer. Returns NULL if the 29 // preference is not defined at the managed layer. 30 const base::Value* GetManagedPref(const char* path) const; 31 32 // Set a preference on the managed layer and fire observers if the preference 33 // changed. Assumes ownership of |value|. 34 void SetManagedPref(const char* path, base::Value* value); 35 36 // Clear the preference on the managed layer and fire observers if the 37 // preference has been defined previously. 38 void RemoveManagedPref(const char* path); 39 40 // Similar to the above, but for user preferences. 41 const base::Value* GetUserPref(const char* path) const; 42 void SetUserPref(const char* path, base::Value* value); 43 void RemoveUserPref(const char* path); 44 45 // Similar to the above, but for recommended policy preferences. 46 const base::Value* GetRecommendedPref(const char* path) const; 47 void SetRecommendedPref(const char* path, base::Value* value); 48 void RemoveRecommendedPref(const char* path); 49 50 // Do-nothing implementation for TestingPrefService. 51 static void HandleReadError(PersistentPrefStore::PrefReadError error) {} 52 53 protected: 54 TestingPrefServiceBase( 55 TestingPrefStore* managed_prefs, 56 TestingPrefStore* user_prefs, 57 TestingPrefStore* recommended_prefs, 58 ConstructionPrefRegistry* pref_registry, 59 PrefNotifierImpl* pref_notifier); 60 61 private: 62 // Reads the value of the preference indicated by |path| from |pref_store|. 63 // Returns NULL if the preference was not found. 64 const base::Value* GetPref(TestingPrefStore* pref_store, 65 const char* path) const; 66 67 // Sets the value for |path| in |pref_store|. 68 void SetPref(TestingPrefStore* pref_store, const char* path, 69 base::Value* value); 70 71 // Removes the preference identified by |path| from |pref_store|. 72 void RemovePref(TestingPrefStore* pref_store, const char* path); 73 74 // Pointers to the pref stores our value store uses. 75 scoped_refptr<TestingPrefStore> managed_prefs_; 76 scoped_refptr<TestingPrefStore> user_prefs_; 77 scoped_refptr<TestingPrefStore> recommended_prefs_; 78 79 DISALLOW_COPY_AND_ASSIGN(TestingPrefServiceBase); 80 }; 81 82 // Test version of PrefService. 83 class TestingPrefServiceSimple 84 : public TestingPrefServiceBase<PrefService, PrefRegistry> { 85 public: 86 TestingPrefServiceSimple(); 87 virtual ~TestingPrefServiceSimple(); 88 89 // This is provided as a convenience for registering preferences on 90 // an existing TestingPrefServiceSimple instance. On a production 91 // PrefService you would do all registrations before constructing 92 // it, passing it a PrefRegistry via its constructor (or via 93 // e.g. PrefServiceBuilder). 94 PrefRegistrySimple* registry(); 95 96 private: 97 DISALLOW_COPY_AND_ASSIGN(TestingPrefServiceSimple); 98 }; 99 100 template<> 101 TestingPrefServiceBase<PrefService, PrefRegistry>::TestingPrefServiceBase( 102 TestingPrefStore* managed_prefs, 103 TestingPrefStore* user_prefs, 104 TestingPrefStore* recommended_prefs, 105 PrefRegistry* pref_registry, 106 PrefNotifierImpl* pref_notifier); 107 108 template<class SuperPrefService, class ConstructionPrefRegistry> 109 TestingPrefServiceBase< 110 SuperPrefService, ConstructionPrefRegistry>::~TestingPrefServiceBase() { 111 } 112 113 template<class SuperPrefService, class ConstructionPrefRegistry> 114 const base::Value* TestingPrefServiceBase< 115 SuperPrefService, ConstructionPrefRegistry>::GetManagedPref( 116 const char* path) const { 117 return GetPref(managed_prefs_.get(), path); 118 } 119 120 template<class SuperPrefService, class ConstructionPrefRegistry> 121 void TestingPrefServiceBase< 122 SuperPrefService, ConstructionPrefRegistry>::SetManagedPref( 123 const char* path, base::Value* value) { 124 SetPref(managed_prefs_.get(), path, value); 125 } 126 127 template<class SuperPrefService, class ConstructionPrefRegistry> 128 void TestingPrefServiceBase< 129 SuperPrefService, ConstructionPrefRegistry>::RemoveManagedPref( 130 const char* path) { 131 RemovePref(managed_prefs_.get(), path); 132 } 133 134 template<class SuperPrefService, class ConstructionPrefRegistry> 135 const base::Value* TestingPrefServiceBase< 136 SuperPrefService, ConstructionPrefRegistry>::GetUserPref( 137 const char* path) const { 138 return GetPref(user_prefs_.get(), path); 139 } 140 141 template<class SuperPrefService, class ConstructionPrefRegistry> 142 void TestingPrefServiceBase< 143 SuperPrefService, ConstructionPrefRegistry>::SetUserPref( 144 const char* path, base::Value* value) { 145 SetPref(user_prefs_.get(), path, value); 146 } 147 148 template<class SuperPrefService, class ConstructionPrefRegistry> 149 void TestingPrefServiceBase< 150 SuperPrefService, ConstructionPrefRegistry>::RemoveUserPref( 151 const char* path) { 152 RemovePref(user_prefs_.get(), path); 153 } 154 155 template<class SuperPrefService, class ConstructionPrefRegistry> 156 const base::Value* TestingPrefServiceBase< 157 SuperPrefService, ConstructionPrefRegistry>::GetRecommendedPref( 158 const char* path) const { 159 return GetPref(recommended_prefs_, path); 160 } 161 162 template<class SuperPrefService, class ConstructionPrefRegistry> 163 void TestingPrefServiceBase< 164 SuperPrefService, ConstructionPrefRegistry>::SetRecommendedPref( 165 const char* path, base::Value* value) { 166 SetPref(recommended_prefs_.get(), path, value); 167 } 168 169 template<class SuperPrefService, class ConstructionPrefRegistry> 170 void TestingPrefServiceBase< 171 SuperPrefService, ConstructionPrefRegistry>::RemoveRecommendedPref( 172 const char* path) { 173 RemovePref(recommended_prefs_.get(), path); 174 } 175 176 template<class SuperPrefService, class ConstructionPrefRegistry> 177 const base::Value* TestingPrefServiceBase< 178 SuperPrefService, ConstructionPrefRegistry>::GetPref( 179 TestingPrefStore* pref_store, const char* path) const { 180 const base::Value* res; 181 return pref_store->GetValue(path, &res) ? res : NULL; 182 } 183 184 template<class SuperPrefService, class ConstructionPrefRegistry> 185 void TestingPrefServiceBase< 186 SuperPrefService, ConstructionPrefRegistry>::SetPref( 187 TestingPrefStore* pref_store, const char* path, base::Value* value) { 188 pref_store->SetValue(path, value); 189 } 190 191 template<class SuperPrefService, class ConstructionPrefRegistry> 192 void TestingPrefServiceBase< 193 SuperPrefService, ConstructionPrefRegistry>::RemovePref( 194 TestingPrefStore* pref_store, const char* path) { 195 pref_store->RemoveValue(path); 196 } 197 198 #endif // BASE_PREFS_TESTING_PREF_SERVICE_H_ 199
