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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdio.h>
#include <map>
#include "base/files/file_enumerator.h"
#include "base/files/file_util.h"
#include "base/files/safe_base_name.h"
#include "base/files/scoped_temp_dir.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/test/bind.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/task_environment.h"
#include "base/threading/platform_thread.h"
#include "build/chromeos_buildflags.h"
#include "net/disk_cache/cache_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"
namespace disk_cache {
class CacheUtilTest : public PlatformTest {
public:
void SetUp() override {
PlatformTest::SetUp();
ASSERT_TRUE(tmp_dir_.CreateUniqueTempDir());
cache_dir_ = tmp_dir_.GetPath().Append(FILE_PATH_LITERAL("Cache"));
file1_ = base::FilePath(cache_dir_.Append(FILE_PATH_LITERAL("file01")));
file2_ = base::FilePath(cache_dir_.Append(FILE_PATH_LITERAL(".file02")));
dir1_ = base::FilePath(cache_dir_.Append(FILE_PATH_LITERAL("dir01")));
file3_ = base::FilePath(dir1_.Append(FILE_PATH_LITERAL("file03")));
ASSERT_TRUE(base::CreateDirectory(cache_dir_));
FILE *fp = base::OpenFile(file1_, "w");
ASSERT_TRUE(fp != nullptr);
base::CloseFile(fp);
fp = base::OpenFile(file2_, "w");
ASSERT_TRUE(fp != nullptr);
base::CloseFile(fp);
ASSERT_TRUE(base::CreateDirectory(dir1_));
fp = base::OpenFile(file3_, "w");
ASSERT_TRUE(fp != nullptr);
base::CloseFile(fp);
dest_dir_ = tmp_dir_.GetPath().Append(FILE_PATH_LITERAL("old_Cache_001"));
dest_file1_ = base::FilePath(dest_dir_.Append(FILE_PATH_LITERAL("file01")));
dest_file2_ =
base::FilePath(dest_dir_.Append(FILE_PATH_LITERAL(".file02")));
dest_dir1_ = base::FilePath(dest_dir_.Append(FILE_PATH_LITERAL("dir01")));
}
protected:
base::ScopedTempDir tmp_dir_;
base::FilePath cache_dir_;
base::FilePath file1_;
base::FilePath file2_;
base::FilePath dir1_;
base::FilePath file3_;
base::FilePath dest_dir_;
base::FilePath dest_file1_;
base::FilePath dest_file2_;
base::FilePath dest_dir1_;
base::test::TaskEnvironment task_environment_;
};
TEST_F(CacheUtilTest, MoveCache) {
EXPECT_TRUE(disk_cache::MoveCache(cache_dir_, dest_dir_));
EXPECT_TRUE(base::PathExists(dest_dir_));
EXPECT_TRUE(base::PathExists(dest_file1_));
EXPECT_TRUE(base::PathExists(dest_file2_));
EXPECT_TRUE(base::PathExists(dest_dir1_));
#if BUILDFLAG(IS_CHROMEOS_ASH)
EXPECT_TRUE(base::PathExists(cache_dir_)); // old cache dir stays
#else
EXPECT_FALSE(base::PathExists(cache_dir_)); // old cache is gone
#endif
EXPECT_FALSE(base::PathExists(file1_));
EXPECT_FALSE(base::PathExists(file2_));
EXPECT_FALSE(base::PathExists(dir1_));
}
TEST_F(CacheUtilTest, DeleteCache) {
disk_cache::DeleteCache(cache_dir_, false);
EXPECT_TRUE(base::PathExists(cache_dir_)); // cache dir stays
EXPECT_FALSE(base::PathExists(dir1_));
EXPECT_FALSE(base::PathExists(file1_));
EXPECT_FALSE(base::PathExists(file2_));
EXPECT_FALSE(base::PathExists(file3_));
}
TEST_F(CacheUtilTest, DeleteCacheAndDir) {
disk_cache::DeleteCache(cache_dir_, true);
EXPECT_FALSE(base::PathExists(cache_dir_)); // cache dir is gone
EXPECT_FALSE(base::PathExists(dir1_));
EXPECT_FALSE(base::PathExists(file1_));
EXPECT_FALSE(base::PathExists(file2_));
EXPECT_FALSE(base::PathExists(file3_));
}
TEST_F(CacheUtilTest, CleanupDirectory) {
base::RunLoop run_loop;
disk_cache::CleanupDirectory(cache_dir_,
base::BindLambdaForTesting([&](bool result) {
EXPECT_TRUE(result);
run_loop.Quit();
}));
run_loop.Run();
while (true) {
base::FileEnumerator enumerator(tmp_dir_.GetPath(), /*recursive=*/false,
/*file_type=*/base::FileEnumerator::FILES |
base::FileEnumerator::DIRECTORIES);
bool found = false;
while (true) {
base::FilePath path = enumerator.Next();
if (path.empty()) {
break;
}
// We're not sure if we see an entry in the directory because it depends
// on timing, but if we do, it must be "old_Cache_000".
// Caveat: On ChromeOS, we leave the top-level directory ("Cache") so
// it must be "Cache" or "old_Cache_000".
const base::FilePath dirname = path.DirName();
absl::optional<base::SafeBaseName> basename =
base::SafeBaseName::Create(path);
ASSERT_EQ(dirname, tmp_dir_.GetPath());
ASSERT_TRUE(basename.has_value());
#if BUILDFLAG(IS_CHROMEOS_ASH)
if (basename->path().value() == FILE_PATH_LITERAL("Cache")) {
// See the comment above.
ASSERT_TRUE(base::IsDirectoryEmpty(dirname.Append(*basename)));
continue;
}
#endif
ASSERT_EQ(basename->path().value(), FILE_PATH_LITERAL("old_Cache_000"));
found = true;
}
if (!found) {
break;
}
base::PlatformThread::Sleep(base::Milliseconds(10));
}
}
#if BUILDFLAG(IS_POSIX)
TEST_F(CacheUtilTest, CleanupDirectoryFailsWhenParentDirectoryIsInaccessible) {
base::RunLoop run_loop;
ASSERT_TRUE(base::SetPosixFilePermissions(tmp_dir_.GetPath(), /*mode=*/0));
disk_cache::CleanupDirectory(cache_dir_,
base::BindLambdaForTesting([&](bool result) {
EXPECT_FALSE(result);
run_loop.Quit();
}));
run_loop.Run();
}
TEST_F(CacheUtilTest,
CleanupDirectorySucceedsWhenTargetDirectoryIsInaccessible) {
base::RunLoop run_loop;
ASSERT_TRUE(base::SetPosixFilePermissions(cache_dir_, /*mode=*/0));
disk_cache::CleanupDirectory(cache_dir_,
base::BindLambdaForTesting([&](bool result) {
EXPECT_TRUE(result);
run_loop.Quit();
}));
run_loop.Run();
}
#endif
TEST_F(CacheUtilTest, PreferredCacheSize) {
const struct TestCase {
int64_t available;
int expected_without_trial;
int expected_with_200_trial;
int expected_with_250_trial;
int expected_with_300_trial;
} kTestCases[] = {
// Weird negative value for available --- return the "default"
{-1000LL, 80 * 1024 * 1024, 160 * 1024 * 1024, 200 * 1024 * 1024,
240 * 1024 * 1024},
{-1LL, 80 * 1024 * 1024, 160 * 1024 * 1024, 200 * 1024 * 1024,
240 * 1024 * 1024},
// 0 produces 0.
{0LL, 0, 0, 0, 0},
// Cache is 80% of available space, when default cache size is larger than
// 80% of available space..
{50 * 1024 * 1024LL, 40 * 1024 * 1024, 40 * 1024 * 1024, 40 * 1024 * 1024,
40 * 1024 * 1024},
// Cache is default size, when default size is 10% to 80% of available
// space.
{100 * 1024 * 1024LL, 80 * 1024 * 1024, 80 * 1024 * 1024,
80 * 1024 * 1024, 80 * 1024 * 1024},
{200 * 1024 * 1024LL, 80 * 1024 * 1024, 80 * 1024 * 1024,
80 * 1024 * 1024, 80 * 1024 * 1024},
// Cache is 10% of available space if 2.5 * default size is more than 10%
// of available space.
{1000 * 1024 * 1024LL, 100 * 1024 * 1024, 200 * 1024 * 1024,
200 * 1024 * 1024, 200 * 1024 * 1024},
{2000 * 1024 * 1024LL, 200 * 1024 * 1024, 400 * 1024 * 1024,
400 * 1024 * 1024, 400 * 1024 * 1024},
// Cache is 2.5 * kDefaultCacheSize if 2.5 * kDefaultCacheSize uses from
// 1% to 10% of available space.
{10000 * 1024 * 1024LL, 200 * 1024 * 1024, 400 * 1024 * 1024,
500 * 1024 * 1024, 600 * 1024 * 1024},
// Otherwise, cache is 1% of available space.
{20000 * 1024 * 1024LL, 200 * 1024 * 1024, 400 * 1024 * 1024,
500 * 1024 * 1024, 600 * 1024 * 1024},
// Until it runs into the cache size cap.
{32000 * 1024 * 1024LL, 320 * 1024 * 1024, 640 * 1024 * 1024,
800 * 1024 * 1024, 960 * 1024 * 1024},
{50000 * 1024 * 1024LL, 320 * 1024 * 1024, 640 * 1024 * 1024,
800 * 1024 * 1024, 960 * 1024 * 1024},
};
for (const auto& test_case : kTestCases) {
EXPECT_EQ(test_case.expected_without_trial,
PreferredCacheSize(test_case.available))
<< test_case.available;
// Preferred size for WebUI code cache matches expected_without_trial but
// should never be more than 5 MB.
int expected_webui_code_cache_size =
std::min(5 * 1024 * 1024, test_case.expected_without_trial);
EXPECT_EQ(expected_webui_code_cache_size,
PreferredCacheSize(test_case.available,
net::GENERATED_WEBUI_BYTE_CODE_CACHE))
<< test_case.available;
}
// Check that the cache size cap is 50% higher for native code caches.
EXPECT_EQ(((320 * 1024 * 1024) / 2) * 3,
PreferredCacheSize(50000 * 1024 * 1024LL,
net::GENERATED_NATIVE_CODE_CACHE));
for (int cache_size_exeriment : {100, 200, 250, 300}) {
base::test::ScopedFeatureList scoped_feature_list;
std::map<std::string, std::string> field_trial_params;
field_trial_params["percent_relative_size"] =
base::NumberToString(cache_size_exeriment);
scoped_feature_list.InitAndEnableFeatureWithParameters(
disk_cache::kChangeDiskCacheSizeExperiment, field_trial_params);
for (const auto& test_case : kTestCases) {
int expected = 0;
switch (cache_size_exeriment) {
case 100:
expected = test_case.expected_without_trial;
break;
case 200:
expected = test_case.expected_with_200_trial;
break;
case 250:
expected = test_case.expected_with_250_trial;
break;
case 300:
expected = test_case.expected_with_300_trial;
break;
}
EXPECT_EQ(expected, PreferredCacheSize(test_case.available));
// For caches other than disk cache, the size is not scaled.
EXPECT_EQ(test_case.expected_without_trial,
PreferredCacheSize(test_case.available,
net::GENERATED_BYTE_CODE_CACHE));
// Preferred size for WebUI code cache is not scaled by the trial, and
// should never be more than 5 MB.
int expected_webui_code_cache_size =
std::min(5 * 1024 * 1024, test_case.expected_without_trial);
EXPECT_EQ(expected_webui_code_cache_size,
PreferredCacheSize(test_case.available,
net::GENERATED_WEBUI_BYTE_CODE_CACHE))
<< test_case.available;
}
// Check that the cache size cap is 50% higher for native code caches but is
// not scaled for the experiment.
EXPECT_EQ(((320 * 1024 * 1024) / 2) * 3,
PreferredCacheSize(50000 * 1024 * 1024LL,
net::GENERATED_NATIVE_CODE_CACHE));
}
// Check no "percent_relative_size" matches default behavior.
{
base::test::ScopedFeatureList scoped_feature_list;
scoped_feature_list.InitAndEnableFeature(
disk_cache::kChangeDiskCacheSizeExperiment);
for (const auto& test_case : kTestCases) {
EXPECT_EQ(test_case.expected_without_trial,
PreferredCacheSize(test_case.available));
}
// Check that the cache size cap is 50% higher for native code caches.
EXPECT_EQ(((320 * 1024 * 1024) / 2) * 3,
PreferredCacheSize(50000 * 1024 * 1024LL,
net::GENERATED_NATIVE_CODE_CACHE));
}
}
} // namespace disk_cache
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