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//
// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "update_engine/common/fake_prefs.h"
#include <algorithm>
#include <utility>
#include <gtest/gtest.h>
using std::string;
using std::vector;
using chromeos_update_engine::FakePrefs;
namespace {
void CheckNotNull(const string& key, void* ptr) {
EXPECT_NE(nullptr, ptr) << "Called Get*() for key \"" << key
<< "\" with a null parameter.";
}
} // namespace
namespace chromeos_update_engine {
FakePrefs::~FakePrefs() {
EXPECT_TRUE(observers_.empty());
}
// Compile-time type-dependent constants definitions.
template <>
FakePrefs::PrefType const FakePrefs::PrefConsts<string>::type =
FakePrefs::PrefType::kString;
template <>
string FakePrefs::PrefValue::*const // NOLINT(runtime/string), not static str.
FakePrefs::PrefConsts<string>::member = &FakePrefs::PrefValue::as_str;
template <>
FakePrefs::PrefType const FakePrefs::PrefConsts<int64_t>::type =
FakePrefs::PrefType::kInt64;
template <>
int64_t FakePrefs::PrefValue::*const FakePrefs::PrefConsts<int64_t>::member =
&FakePrefs::PrefValue::as_int64;
template <>
FakePrefs::PrefType const FakePrefs::PrefConsts<bool>::type =
FakePrefs::PrefType::kBool;
template <>
bool FakePrefs::PrefValue::*const FakePrefs::PrefConsts<bool>::member =
&FakePrefs::PrefValue::as_bool;
bool FakePrefs::GetString(const string& key, string* value) const {
return GetValue(key, value);
}
bool FakePrefs::SetString(const string& key, std::string_view value) {
SetValue(key, std::string(value));
return true;
}
bool FakePrefs::GetInt64(const string& key, int64_t* value) const {
return GetValue(key, value);
}
bool FakePrefs::SetInt64(const string& key, const int64_t value) {
SetValue(key, value);
return true;
}
bool FakePrefs::GetBoolean(const string& key, bool* value) const {
return GetValue(key, value);
}
bool FakePrefs::SetBoolean(const string& key, const bool value) {
SetValue(key, value);
return true;
}
bool FakePrefs::Exists(const string& key) const {
return values_.find(key) != values_.end();
}
bool FakePrefs::Delete(const string& key) {
if (values_.find(key) == values_.end())
return false;
values_.erase(key);
const auto observers_for_key = observers_.find(key);
if (observers_for_key != observers_.end()) {
std::vector<ObserverInterface*> copy_observers(observers_for_key->second);
for (ObserverInterface* observer : copy_observers)
observer->OnPrefDeleted(key);
}
return true;
}
bool FakePrefs::Delete(const string& key, const vector<string>& nss) {
bool success = Delete(key);
for (const auto& ns : nss) {
vector<string> ns_keys;
success = GetSubKeys(ns, &ns_keys) && success;
for (const auto& sub_key : ns_keys) {
auto last_key_seperator = sub_key.find_last_of(kKeySeparator);
if (last_key_seperator != string::npos &&
key == sub_key.substr(last_key_seperator + 1)) {
success = Delete(sub_key) && success;
}
}
}
return success;
}
bool FakePrefs::GetSubKeys(const string& ns, vector<string>* keys) const {
for (const auto& pr : values_)
if (pr.first.compare(0, ns.length(), ns) == 0)
keys->push_back(pr.first);
return true;
}
string FakePrefs::GetTypeName(PrefType type) {
switch (type) {
case PrefType::kString:
return "string";
case PrefType::kInt64:
return "int64_t";
case PrefType::kBool:
return "bool";
}
return "Unknown";
}
void FakePrefs::CheckKeyType(const string& key, PrefType type) const {
auto it = values_.find(key);
EXPECT_TRUE(it == values_.end() || it->second.type == type)
<< "Key \"" << key << "\" if defined as " << GetTypeName(it->second.type)
<< " but is accessed as a " << GetTypeName(type);
}
template <typename T>
void FakePrefs::SetValue(const string& key, T value) {
CheckKeyType(key, PrefConsts<T>::type);
values_[key].type = PrefConsts<T>::type;
values_[key].value.*(PrefConsts<T>::member) = std::move(value);
const auto observers_for_key = observers_.find(key);
if (observers_for_key != observers_.end()) {
std::vector<ObserverInterface*> copy_observers(observers_for_key->second);
for (ObserverInterface* observer : copy_observers)
observer->OnPrefSet(key);
}
}
template <typename T>
bool FakePrefs::GetValue(const string& key, T* value) const {
CheckKeyType(key, PrefConsts<T>::type);
auto it = values_.find(key);
if (it == values_.end())
return false;
CheckNotNull(key, value);
*value = it->second.value.*(PrefConsts<T>::member);
return true;
}
void FakePrefs::AddObserver(const string& key, ObserverInterface* observer) {
observers_[key].push_back(observer);
}
void FakePrefs::RemoveObserver(const string& key, ObserverInterface* observer) {
std::vector<ObserverInterface*>& observers_for_key = observers_[key];
auto observer_it =
std::find(observers_for_key.begin(), observers_for_key.end(), observer);
EXPECT_NE(observer_it, observers_for_key.end())
<< "Trying to remove an observer instance not watching the key " << key;
if (observer_it != observers_for_key.end())
observers_for_key.erase(observer_it);
if (observers_for_key.empty())
observers_.erase(key);
}
} // namespace chromeos_update_engine
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