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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/browser_context_helper/file_flusher.h"
#include <map>
#include <memory>
#include <string>
#include <string_view>
#include "base/barrier_closure.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/run_loop.h"
#include "base/strings/stringprintf.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash {
namespace {
void WriteStringToFile(const base::FilePath& path, std::string_view data) {
ASSERT_TRUE(base::CreateDirectory(path.DirName()))
<< "Failed to create directory " << path.DirName().value();
ASSERT_TRUE(base::WriteFile(path, data))
<< "Failed to write " << path.value();
}
} // namespace
// Provide basic sanity test of the FileFlusher. Note it only tests that
// flush is called for the expected files but not testing the underlying
// file system for actually persisting the data.
class FileFlusherTest : public testing::Test {
public:
FileFlusherTest() = default;
FileFlusherTest(const FileFlusherTest&) = delete;
FileFlusherTest& operator=(const FileFlusherTest&) = delete;
~FileFlusherTest() override = default;
// testing::Test
void SetUp() override {
// Create test files under a temp dir.
ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
const size_t kNumDirs = 2;
const size_t kNumFiles = 3;
for (size_t i = 1; i <= kNumDirs; ++i) {
for (size_t j = 1; j <= kNumFiles; ++j) {
const std::string path = base::StringPrintf("dir%zu/file%zu", i, j);
const std::string content = base::StringPrintf("content %zu %zu", i, j);
WriteStringToFile(temp_dir_.GetPath().AppendASCII(path), content);
}
}
}
std::unique_ptr<FileFlusher> CreateFileFlusher() {
auto flusher = std::make_unique<FileFlusher>();
flusher->set_on_flush_callback_for_test(
base::BindRepeating(&FileFlusherTest::OnFlush, base::Unretained(this)));
return flusher;
}
base::FilePath GetTestFilePath(const std::string& path_string) const {
const base::FilePath path = base::FilePath::FromUTF8Unsafe(path_string);
if (path.IsAbsolute()) {
return path;
}
return temp_dir_.GetPath().Append(path);
}
void OnFlush(const base::FilePath& path) { ++flush_counts_[path]; }
int GetFlushCount(const std::string& path_string) const {
const base::FilePath path(GetTestFilePath(path_string));
const auto& it = flush_counts_.find(path);
return it == flush_counts_.end() ? 0 : it->second;
}
private:
base::test::TaskEnvironment task_environment_;
base::ScopedTempDir temp_dir_;
std::map<base::FilePath, int> flush_counts_;
};
TEST_F(FileFlusherTest, Flush) {
std::unique_ptr<FileFlusher> flusher(CreateFileFlusher());
base::RunLoop run_loop;
auto completion_callback = base::BarrierClosure(2, run_loop.QuitClosure());
flusher->RequestFlush(GetTestFilePath("dir1"), /*recursive=*/false,
completion_callback);
flusher->RequestFlush(GetTestFilePath("dir2"), /*recursive=*/false,
completion_callback);
run_loop.Run();
EXPECT_EQ(1, GetFlushCount("dir1/file1"));
EXPECT_EQ(1, GetFlushCount("dir1/file2"));
EXPECT_EQ(1, GetFlushCount("dir1/file3"));
EXPECT_EQ(1, GetFlushCount("dir2/file1"));
EXPECT_EQ(1, GetFlushCount("dir2/file2"));
EXPECT_EQ(1, GetFlushCount("dir2/file3"));
}
TEST_F(FileFlusherTest, DuplicateRequests) {
std::unique_ptr<FileFlusher> flusher(CreateFileFlusher());
base::RunLoop run_loop;
flusher->PauseForTest();
auto completion_callback = base::BarrierClosure(2, run_loop.QuitClosure());
flusher->RequestFlush(GetTestFilePath("dir1"), /*recursive=*/false,
completion_callback);
flusher->RequestFlush(GetTestFilePath("dir1"), /*recursive=*/false,
completion_callback);
flusher->ResumeForTest();
run_loop.Run();
EXPECT_EQ(1, GetFlushCount("dir1/file1"));
EXPECT_EQ(1, GetFlushCount("dir1/file2"));
EXPECT_EQ(1, GetFlushCount("dir1/file3"));
}
} // namespace ash
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