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// Copyright (C) 2013 Google Inc.
//
// 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 "retriever.h"
#include <libaddressinput/callback.h>
#include <libaddressinput/null_storage.h>
#include <libaddressinput/storage.h>
#include <libaddressinput/util/basictypes.h>
#include <libaddressinput/util/scoped_ptr.h>
#include <cstddef>
#include <string>
#include <gtest/gtest.h>
#include "mock_source.h"
#include "testdata_source.h"
#define CHECKSUM "dd63dafcbd4d5b28badfcaf86fb6fcdb"
#define DATA "{'foo': 'bar'}"
#define OLD_TIMESTAMP "0"
namespace {
using i18n::addressinput::BuildCallback;
using i18n::addressinput::MockSource;
using i18n::addressinput::NullStorage;
using i18n::addressinput::Retriever;
using i18n::addressinput::scoped_ptr;
using i18n::addressinput::Storage;
using i18n::addressinput::TestdataSource;
const char kKey[] = "data/CA/AB--fr";
// Empty data that the source can return.
const char kEmptyData[] = "{}";
// The value of the data that the stale storage returns.
const char kStaleData[] = DATA;
// The actual data that the stale storage returns.
const char kStaleWrappedData[] = "timestamp=" OLD_TIMESTAMP "\n"
"checksum=" CHECKSUM "\n"
DATA;
// Tests for Retriever object.
class RetrieverTest : public testing::Test {
protected:
RetrieverTest()
: retriever_(new TestdataSource(false), new NullStorage),
success_(false),
key_(),
data_(),
data_ready_(BuildCallback(this, &RetrieverTest::OnDataReady)) {}
virtual ~RetrieverTest() {}
Retriever retriever_;
bool success_;
std::string key_;
std::string data_;
const scoped_ptr<const Retriever::Callback> data_ready_;
private:
void OnDataReady(bool success,
const std::string& key,
const std::string& data) {
success_ = success;
key_ = key;
data_ = data;
}
DISALLOW_COPY_AND_ASSIGN(RetrieverTest);
};
TEST_F(RetrieverTest, RetrieveData) {
retriever_.Retrieve(kKey, *data_ready_);
EXPECT_TRUE(success_);
EXPECT_EQ(kKey, key_);
EXPECT_FALSE(data_.empty());
EXPECT_NE(kEmptyData, data_);
}
TEST_F(RetrieverTest, ReadDataFromStorage) {
retriever_.Retrieve(kKey, *data_ready_);
retriever_.Retrieve(kKey, *data_ready_);
EXPECT_TRUE(success_);
EXPECT_EQ(kKey, key_);
EXPECT_FALSE(data_.empty());
EXPECT_NE(kEmptyData, data_);
}
TEST_F(RetrieverTest, MissingKeyReturnsEmptyData) {
static const char kMissingKey[] = "junk";
retriever_.Retrieve(kMissingKey, *data_ready_);
EXPECT_TRUE(success_);
EXPECT_EQ(kMissingKey, key_);
EXPECT_EQ(kEmptyData, data_);
}
TEST_F(RetrieverTest, FaultySource) {
// An empty MockSource will fail for any request.
Retriever bad_retriever(new MockSource, new NullStorage);
bad_retriever.Retrieve(kKey, *data_ready_);
EXPECT_FALSE(success_);
EXPECT_EQ(kKey, key_);
EXPECT_TRUE(data_.empty());
}
// The storage that always returns stale data.
class StaleStorage : public Storage {
public:
StaleStorage() : data_updated_(false) {}
virtual ~StaleStorage() {}
// Storage implementation.
virtual void Get(const std::string& key, const Callback& data_ready) const {
data_ready(true, key, new std::string(kStaleWrappedData));
}
virtual void Put(const std::string& key, std::string* value) {
ASSERT_TRUE(value != NULL);
data_updated_ = true;
delete value;
}
bool data_updated_;
private:
DISALLOW_COPY_AND_ASSIGN(StaleStorage);
};
TEST_F(RetrieverTest, UseStaleDataWhenSourceFails) {
// Owned by |resilient_retriver|.
StaleStorage* stale_storage = new StaleStorage;
// An empty MockSource will fail for any request.
Retriever resilient_retriever(new MockSource, stale_storage);
resilient_retriever.Retrieve(kKey, *data_ready_);
EXPECT_TRUE(success_);
EXPECT_EQ(kKey, key_);
EXPECT_EQ(kStaleData, data_);
EXPECT_FALSE(stale_storage->data_updated_);
}
TEST_F(RetrieverTest, DoNotUseStaleDataWhenSourceSucceeds) {
// Owned by |resilient_retriver|.
StaleStorage* stale_storage = new StaleStorage;
Retriever resilient_retriever(new TestdataSource(false), stale_storage);
resilient_retriever.Retrieve(kKey, *data_ready_);
EXPECT_TRUE(success_);
EXPECT_EQ(kKey, key_);
EXPECT_FALSE(data_.empty());
EXPECT_NE(kEmptyData, data_);
EXPECT_NE(kStaleData, data_);
EXPECT_TRUE(stale_storage->data_updated_);
}
} // namespace
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