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// 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.
#ifndef BASE_PREFS_TESTING_PREF_SERVICE_H_
#define BASE_PREFS_TESTING_PREF_SERVICE_H_
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/prefs/pref_registry.h"
#include "base/prefs/pref_service.h"
#include "base/prefs/testing_pref_store.h"
class PrefNotifierImpl;
class PrefRegistrySimple;
class TestingPrefStore;
// A PrefService subclass for testing. It operates totally in memory and
// provides additional API for manipulating preferences at the different levels
// (managed, extension, user) conveniently.
//
// Use this via its specializations, e.g. TestingPrefServiceSimple.
template <class SuperPrefService, class ConstructionPrefRegistry>
class TestingPrefServiceBase : public SuperPrefService {
public:
virtual ~TestingPrefServiceBase();
// Read the value of a preference from the managed layer. Returns NULL if the
// preference is not defined at the managed layer.
const base::Value* GetManagedPref(const char* path) const;
// Set a preference on the managed layer and fire observers if the preference
// changed. Assumes ownership of |value|.
void SetManagedPref(const char* path, base::Value* value);
// Clear the preference on the managed layer and fire observers if the
// preference has been defined previously.
void RemoveManagedPref(const char* path);
// Similar to the above, but for user preferences.
const base::Value* GetUserPref(const char* path) const;
void SetUserPref(const char* path, base::Value* value);
void RemoveUserPref(const char* path);
// Similar to the above, but for recommended policy preferences.
const base::Value* GetRecommendedPref(const char* path) const;
void SetRecommendedPref(const char* path, base::Value* value);
void RemoveRecommendedPref(const char* path);
// Do-nothing implementation for TestingPrefService.
static void HandleReadError(PersistentPrefStore::PrefReadError error) {}
protected:
TestingPrefServiceBase(
TestingPrefStore* managed_prefs,
TestingPrefStore* user_prefs,
TestingPrefStore* recommended_prefs,
ConstructionPrefRegistry* pref_registry,
PrefNotifierImpl* pref_notifier);
private:
// Reads the value of the preference indicated by |path| from |pref_store|.
// Returns NULL if the preference was not found.
const base::Value* GetPref(TestingPrefStore* pref_store,
const char* path) const;
// Sets the value for |path| in |pref_store|.
void SetPref(TestingPrefStore* pref_store, const char* path,
base::Value* value);
// Removes the preference identified by |path| from |pref_store|.
void RemovePref(TestingPrefStore* pref_store, const char* path);
// Pointers to the pref stores our value store uses.
scoped_refptr<TestingPrefStore> managed_prefs_;
scoped_refptr<TestingPrefStore> user_prefs_;
scoped_refptr<TestingPrefStore> recommended_prefs_;
DISALLOW_COPY_AND_ASSIGN(TestingPrefServiceBase);
};
// Test version of PrefService.
class TestingPrefServiceSimple
: public TestingPrefServiceBase<PrefService, PrefRegistry> {
public:
TestingPrefServiceSimple();
~TestingPrefServiceSimple() override;
// This is provided as a convenience for registering preferences on
// an existing TestingPrefServiceSimple instance. On a production
// PrefService you would do all registrations before constructing
// it, passing it a PrefRegistry via its constructor (or via
// e.g. PrefServiceFactory).
PrefRegistrySimple* registry();
private:
DISALLOW_COPY_AND_ASSIGN(TestingPrefServiceSimple);
};
template<>
TestingPrefServiceBase<PrefService, PrefRegistry>::TestingPrefServiceBase(
TestingPrefStore* managed_prefs,
TestingPrefStore* user_prefs,
TestingPrefStore* recommended_prefs,
PrefRegistry* pref_registry,
PrefNotifierImpl* pref_notifier);
template<class SuperPrefService, class ConstructionPrefRegistry>
TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::~TestingPrefServiceBase() {
}
template<class SuperPrefService, class ConstructionPrefRegistry>
const base::Value* TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::GetManagedPref(
const char* path) const {
return GetPref(managed_prefs_.get(), path);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::SetManagedPref(
const char* path, base::Value* value) {
SetPref(managed_prefs_.get(), path, value);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::RemoveManagedPref(
const char* path) {
RemovePref(managed_prefs_.get(), path);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
const base::Value* TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::GetUserPref(
const char* path) const {
return GetPref(user_prefs_.get(), path);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::SetUserPref(
const char* path, base::Value* value) {
SetPref(user_prefs_.get(), path, value);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::RemoveUserPref(
const char* path) {
RemovePref(user_prefs_.get(), path);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
const base::Value* TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::GetRecommendedPref(
const char* path) const {
return GetPref(recommended_prefs_, path);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::SetRecommendedPref(
const char* path, base::Value* value) {
SetPref(recommended_prefs_.get(), path, value);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::RemoveRecommendedPref(
const char* path) {
RemovePref(recommended_prefs_.get(), path);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
const base::Value* TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::GetPref(
TestingPrefStore* pref_store, const char* path) const {
const base::Value* res;
return pref_store->GetValue(path, &res) ? res : NULL;
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::SetPref(
TestingPrefStore* pref_store, const char* path, base::Value* value) {
pref_store->SetValue(path, value);
}
template<class SuperPrefService, class ConstructionPrefRegistry>
void TestingPrefServiceBase<
SuperPrefService, ConstructionPrefRegistry>::RemovePref(
TestingPrefStore* pref_store, const char* path) {
pref_store->RemoveValue(path);
}
#endif // BASE_PREFS_TESTING_PREF_SERVICE_H_
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