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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/file_system_provider/throttled_file_system.h"
#include <stddef.h>
#include <memory>
#include <vector>
#include "base/files/file.h"
#include "base/functional/bind.h"
#include "base/run_loop.h"
#include "chrome/browser/ash/file_system_provider/abort_callback.h"
#include "chrome/browser/ash/file_system_provider/fake_provided_file_system.h"
#include "chrome/browser/ash/file_system_provider/icon_set.h"
#include "chrome/browser/ash/file_system_provider/provided_file_system_info.h"
#include "chrome/common/extensions/api/file_system_provider_capabilities/file_system_provider_capabilities_handler.h"
#include "content/public/test/browser_task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash::file_system_provider {
namespace {
const char kExtensionId[] = "mbflcebpggnecokmikipoihdbecnjfoj";
const char kFileSystemId[] = "camera-pictures";
const char kDisplayName[] = "Camera Pictures";
typedef std::vector<base::File::Error> StatusLog;
typedef std::vector<std::pair<int, base::File::Error>> OpenLog;
// Writes a |result| to the |log| vector for a status callback.
void LogStatus(StatusLog* log, base::File::Error result) {
log->push_back(result);
}
// Writes a |result| to the |log| vector for opening a file.
void LogOpen(OpenLog* log,
int handle,
base::File::Error result,
std::unique_ptr<EntryMetadata> metadata) {
log->emplace_back(handle, result);
}
} // namespace
class FileSystemProviderThrottledFileSystemTest : public testing::Test {
protected:
FileSystemProviderThrottledFileSystemTest() = default;
~FileSystemProviderThrottledFileSystemTest() override = default;
void SetUp() override {}
// Initializes the throttled file system with |limit| number of opened files
// at once. If 0, then no limit.
void SetUpFileSystem(size_t limit) {
MountOptions options(kFileSystemId, kDisplayName);
options.opened_files_limit = limit;
ProvidedFileSystemInfo file_system_info(
kExtensionId, options, /*mount_path=*/base::FilePath(),
/*configurable=*/false, /*watchable=*/true, extensions::SOURCE_FILE,
IconSet());
file_system_ = std::make_unique<ThrottledFileSystem>(
std::make_unique<FakeProvidedFileSystem>(file_system_info));
}
content::BrowserTaskEnvironment task_environment_;
std::unique_ptr<ThrottledFileSystem> file_system_;
};
TEST_F(FileSystemProviderThrottledFileSystemTest, OpenFile_LimitedToOneAtOnce) {
SetUpFileSystem(1);
OpenLog first_open_log;
file_system_->OpenFile(base::FilePath(kFakeFilePath), OPEN_FILE_MODE_READ,
base::BindOnce(&LogOpen, &first_open_log));
OpenLog second_open_log;
file_system_->OpenFile(base::FilePath(kFakeFilePath), OPEN_FILE_MODE_READ,
base::BindOnce(&LogOpen, &second_open_log));
base::RunLoop().RunUntilIdle();
ASSERT_EQ(1u, first_open_log.size());
EXPECT_EQ(base::File::FILE_OK, first_open_log[0].second);
EXPECT_EQ(0u, second_open_log.size());
// Close the first file.
StatusLog close_log;
file_system_->CloseFile(first_open_log[0].first,
base::BindOnce(&LogStatus, &close_log));
base::RunLoop().RunUntilIdle();
ASSERT_EQ(1u, close_log.size());
EXPECT_EQ(base::File::FILE_OK, close_log[0]);
// The second enqueued file should be opened.
ASSERT_EQ(1u, first_open_log.size());
EXPECT_EQ(base::File::FILE_OK, first_open_log[0].second);
ASSERT_EQ(1u, second_open_log.size());
EXPECT_EQ(base::File::FILE_OK, second_open_log[0].second);
}
TEST_F(FileSystemProviderThrottledFileSystemTest, OpenFile_NoLimit) {
SetUpFileSystem(0); // No limit.
OpenLog first_open_log;
file_system_->OpenFile(base::FilePath(kFakeFilePath), OPEN_FILE_MODE_READ,
base::BindOnce(&LogOpen, &first_open_log));
OpenLog second_open_log;
file_system_->OpenFile(base::FilePath(kFakeFilePath), OPEN_FILE_MODE_READ,
base::BindOnce(&LogOpen, &second_open_log));
base::RunLoop().RunUntilIdle();
ASSERT_EQ(1u, first_open_log.size());
EXPECT_EQ(base::File::FILE_OK, first_open_log[0].second);
ASSERT_EQ(1u, second_open_log.size());
EXPECT_EQ(base::File::FILE_OK, second_open_log[0].second);
// Close files.
StatusLog first_close_log;
file_system_->CloseFile(first_open_log[0].first,
base::BindOnce(&LogStatus, &first_close_log));
StatusLog second_close_log;
file_system_->CloseFile(second_open_log[0].first,
base::BindOnce(&LogStatus, &second_close_log));
base::RunLoop().RunUntilIdle();
ASSERT_EQ(1u, first_close_log.size());
EXPECT_EQ(base::File::FILE_OK, first_close_log[0]);
ASSERT_EQ(1u, second_close_log.size());
EXPECT_EQ(base::File::FILE_OK, second_close_log[0]);
// Confirm, that files are not opened again.
EXPECT_EQ(1u, first_open_log.size());
EXPECT_EQ(1u, second_open_log.size());
}
TEST_F(FileSystemProviderThrottledFileSystemTest, AbortAfterRun) {
SetUpFileSystem(1);
OpenLog first_open_log;
AbortCallback abort_callback =
file_system_->OpenFile(base::FilePath(kFakeFilePath), OPEN_FILE_MODE_READ,
base::BindOnce(&LogOpen, &first_open_log));
OpenLog second_open_log;
file_system_->OpenFile(base::FilePath(kFakeFilePath), OPEN_FILE_MODE_READ,
base::BindOnce(&LogOpen, &second_open_log));
base::RunLoop().RunUntilIdle();
ASSERT_EQ(1u, first_open_log.size());
EXPECT_EQ(base::File::FILE_OK, first_open_log[0].second);
EXPECT_EQ(0u, second_open_log.size());
}
} // namespace ash::file_system_provider
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