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// Copyright 2013 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 "components/prefs/mock_pref_change_callback.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "components/prefs/testing_pref_service.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using testing::_;
using testing::Mock;
class ScopedUserPrefUpdateTest : public testing::Test {
public:
ScopedUserPrefUpdateTest() : observer_(&prefs_) {}
~ScopedUserPrefUpdateTest() override {}
protected:
void SetUp() override {
prefs_.registry()->RegisterDictionaryPref(kPref);
registrar_.Init(&prefs_);
registrar_.Add(kPref, observer_.GetCallback());
}
static const char kPref[];
static const char kKey[];
static const char kValue[];
TestingPrefServiceSimple prefs_;
MockPrefChangeCallback observer_;
PrefChangeRegistrar registrar_;
};
const char ScopedUserPrefUpdateTest::kPref[] = "name";
const char ScopedUserPrefUpdateTest::kKey[] = "key";
const char ScopedUserPrefUpdateTest::kValue[] = "value";
TEST_F(ScopedUserPrefUpdateTest, RegularUse) {
// Dictionary that will be expected to be set at the end.
base::DictionaryValue expected_dictionary;
expected_dictionary.SetString(kKey, kValue);
{
EXPECT_CALL(observer_, OnPreferenceChanged(_)).Times(0);
DictionaryPrefUpdate update(&prefs_, kPref);
base::DictionaryValue* value = update.Get();
ASSERT_TRUE(value);
value->SetString(kKey, kValue);
// The dictionary was created for us but the creation should have happened
// silently without notifications.
Mock::VerifyAndClearExpectations(&observer_);
// Modifications happen online and are instantly visible, though.
const base::DictionaryValue* current_value = prefs_.GetDictionary(kPref);
ASSERT_TRUE(current_value);
EXPECT_TRUE(expected_dictionary.Equals(current_value));
// Now we are leaving the scope of the update so we should be notified.
observer_.Expect(kPref, &expected_dictionary);
}
Mock::VerifyAndClearExpectations(&observer_);
const base::DictionaryValue* current_value = prefs_.GetDictionary(kPref);
ASSERT_TRUE(current_value);
EXPECT_TRUE(expected_dictionary.Equals(current_value));
}
TEST_F(ScopedUserPrefUpdateTest, NeverTouchAnything) {
const base::DictionaryValue* old_value = prefs_.GetDictionary(kPref);
EXPECT_CALL(observer_, OnPreferenceChanged(_)).Times(0);
{
DictionaryPrefUpdate update(&prefs_, kPref);
}
const base::DictionaryValue* new_value = prefs_.GetDictionary(kPref);
EXPECT_EQ(old_value, new_value);
Mock::VerifyAndClearExpectations(&observer_);
}
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