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// Copyright (c) 2011 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 "base/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/hash.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/pickle.h"
#include "base/run_loop.h"
#include "base/strings/stringprintf.h"
#include "base/time/time.h"
#include "net/disk_cache/simple/simple_entry_format.h"
#include "net/disk_cache/simple/simple_index.h"
#include "net/disk_cache/simple/simple_index_file.h"
#include "testing/gtest/include/gtest/gtest.h"
using base::Time;
using disk_cache::SimpleIndexFile;
using disk_cache::SimpleIndex;
namespace disk_cache {
TEST(IndexMetadataTest, Basics) {
SimpleIndexFile::IndexMetadata index_metadata;
EXPECT_EQ(disk_cache::kSimpleIndexMagicNumber, index_metadata.magic_number_);
EXPECT_EQ(disk_cache::kSimpleVersion, index_metadata.version_);
EXPECT_EQ(0U, index_metadata.GetNumberOfEntries());
EXPECT_EQ(0U, index_metadata.cache_size_);
EXPECT_TRUE(index_metadata.CheckIndexMetadata());
}
TEST(IndexMetadataTest, Serialize) {
SimpleIndexFile::IndexMetadata index_metadata(123, 456);
Pickle pickle;
index_metadata.Serialize(&pickle);
PickleIterator it(pickle);
SimpleIndexFile::IndexMetadata new_index_metadata;
new_index_metadata.Deserialize(&it);
EXPECT_EQ(new_index_metadata.magic_number_, index_metadata.magic_number_);
EXPECT_EQ(new_index_metadata.version_, index_metadata.version_);
EXPECT_EQ(new_index_metadata.GetNumberOfEntries(),
index_metadata.GetNumberOfEntries());
EXPECT_EQ(new_index_metadata.cache_size_, index_metadata.cache_size_);
EXPECT_TRUE(new_index_metadata.CheckIndexMetadata());
}
// This friend derived class is able to reexport its ancestors private methods
// as public, for use in tests.
class WrappedSimpleIndexFile : public SimpleIndexFile {
public:
using SimpleIndexFile::Deserialize;
using SimpleIndexFile::IsIndexFileStale;
using SimpleIndexFile::kIndexFileName;
using SimpleIndexFile::Serialize;
explicit WrappedSimpleIndexFile(const base::FilePath& index_file_directory)
: SimpleIndexFile(base::MessageLoopProxy::current().get(),
base::MessageLoopProxy::current().get(),
index_file_directory) {}
virtual ~WrappedSimpleIndexFile() {
}
};
class SimpleIndexFileTest : public testing::Test {
public:
bool CompareTwoEntryMetadata(const EntryMetadata& a, const EntryMetadata& b) {
return a.last_used_time_ == b.last_used_time_ &&
a.entry_size_ == b.entry_size_;
}
protected:
struct IndexCompletionCallbackResult {
IndexCompletionCallbackResult(
scoped_ptr<SimpleIndex::EntrySet> index_file_entries,
bool force_index_flush)
: index_file_entries(index_file_entries.Pass()),
force_index_flush(force_index_flush) {
}
const scoped_ptr<SimpleIndex::EntrySet> index_file_entries;
const bool force_index_flush;
};
SimpleIndexFile::IndexCompletionCallback GetCallback() {
return base::Bind(&SimpleIndexFileTest::IndexCompletionCallback,
base::Unretained(this));
}
IndexCompletionCallbackResult* callback_result() {
return callback_result_.get();
}
private:
void IndexCompletionCallback(
scoped_ptr<SimpleIndex::EntrySet> index_file_entries,
bool force_index_flush) {
EXPECT_FALSE(callback_result_);
callback_result_.reset(
new IndexCompletionCallbackResult(index_file_entries.Pass(),
force_index_flush));
}
scoped_ptr<IndexCompletionCallbackResult> callback_result_;
};
TEST_F(SimpleIndexFileTest, Serialize) {
SimpleIndex::EntrySet entries;
static const uint64 kHashes[] = { 11, 22, 33 };
static const size_t kNumHashes = arraysize(kHashes);
EntryMetadata metadata_entries[kNumHashes];
SimpleIndexFile::IndexMetadata index_metadata(static_cast<uint64>(kNumHashes),
456);
for (size_t i = 0; i < kNumHashes; ++i) {
uint64 hash = kHashes[i];
metadata_entries[i] =
EntryMetadata(Time::FromInternalValue(hash), hash);
SimpleIndex::InsertInEntrySet(hash, metadata_entries[i], &entries);
}
scoped_ptr<Pickle> pickle = WrappedSimpleIndexFile::Serialize(
index_metadata, entries);
EXPECT_TRUE(pickle.get() != NULL);
scoped_ptr<SimpleIndex::EntrySet> new_entries =
WrappedSimpleIndexFile::Deserialize(
static_cast<const char*>(pickle->data()), pickle->size());
EXPECT_TRUE(new_entries.get() != NULL);
EXPECT_EQ(entries.size(), new_entries->size());
for (size_t i = 0; i < kNumHashes; ++i) {
SimpleIndex::EntrySet::iterator it = new_entries->find(kHashes[i]);
EXPECT_TRUE(new_entries->end() != it);
EXPECT_TRUE(CompareTwoEntryMetadata(it->second, metadata_entries[i]));
}
}
TEST_F(SimpleIndexFileTest, IsIndexFileStale) {
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
const std::string kIndexFileName = "simple-index";
const base::FilePath index_path =
temp_dir.path().AppendASCII(kIndexFileName);
EXPECT_TRUE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
const std::string kDummyData = "nothing to be seen here";
EXPECT_EQ(static_cast<int>(kDummyData.size()),
file_util::WriteFile(index_path,
kDummyData.data(),
kDummyData.size()));
EXPECT_FALSE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
const base::Time past_time = base::Time::Now() -
base::TimeDelta::FromSeconds(10);
EXPECT_TRUE(file_util::TouchFile(index_path, past_time, past_time));
EXPECT_TRUE(file_util::TouchFile(temp_dir.path(), past_time, past_time));
EXPECT_FALSE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
EXPECT_EQ(static_cast<int>(kDummyData.size()),
file_util::WriteFile(temp_dir.path().AppendASCII("other_file"),
kDummyData.data(),
kDummyData.size()));
EXPECT_TRUE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
}
TEST_F(SimpleIndexFileTest, WriteThenLoadIndex) {
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
const base::FilePath index_path =
temp_dir.path().AppendASCII(WrappedSimpleIndexFile::kIndexFileName);
EXPECT_TRUE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
SimpleIndex::EntrySet entries;
static const uint64 kHashes[] = { 11, 22, 33 };
static const size_t kNumHashes = arraysize(kHashes);
EntryMetadata metadata_entries[kNumHashes];
for (size_t i = 0; i < kNumHashes; ++i) {
uint64 hash = kHashes[i];
metadata_entries[i] =
EntryMetadata(Time::FromInternalValue(hash), hash);
SimpleIndex::InsertInEntrySet(hash, metadata_entries[i], &entries);
}
const uint64 kCacheSize = 456U;
{
WrappedSimpleIndexFile simple_index_file(temp_dir.path());
simple_index_file.WriteToDisk(entries, kCacheSize,
base::TimeTicks(), false);
base::RunLoop().RunUntilIdle();
EXPECT_TRUE(base::PathExists(index_path));
}
WrappedSimpleIndexFile simple_index_file(temp_dir.path());
simple_index_file.LoadIndexEntries(base::MessageLoopProxy::current(),
GetCallback());
base::RunLoop().RunUntilIdle();
EXPECT_TRUE(base::PathExists(index_path));
ASSERT_TRUE(callback_result());
EXPECT_FALSE(callback_result()->force_index_flush);
const SimpleIndex::EntrySet* read_entries =
callback_result()->index_file_entries.get();
ASSERT_TRUE(read_entries);
EXPECT_EQ(kNumHashes, read_entries->size());
for (size_t i = 0; i < kNumHashes; ++i)
EXPECT_EQ(1U, read_entries->count(kHashes[i]));
}
TEST_F(SimpleIndexFileTest, LoadCorruptIndex) {
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
const base::FilePath index_path =
temp_dir.path().AppendASCII(WrappedSimpleIndexFile::kIndexFileName);
EXPECT_TRUE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
const std::string kDummyData = "nothing to be seen here";
EXPECT_EQ(static_cast<int>(kDummyData.size()),
file_util::WriteFile(index_path,
kDummyData.data(),
kDummyData.size()));
EXPECT_FALSE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
WrappedSimpleIndexFile simple_index_file(temp_dir.path());
simple_index_file.LoadIndexEntries(base::MessageLoopProxy::current().get(),
GetCallback());
base::RunLoop().RunUntilIdle();
EXPECT_FALSE(base::PathExists(index_path));
ASSERT_TRUE(callback_result());
EXPECT_TRUE(callback_result()->force_index_flush);
EXPECT_TRUE(callback_result()->index_file_entries);
}
} // namespace disk_cache
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