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// Copyright (c) 2012 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/files/important_file_writer.h"
#include "base/compiler_specific.h"
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/files/scoped_temp_dir.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/threading/thread.h"
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
std::string GetFileContent(const FilePath& path) {
std::string content;
if (!file_util::ReadFileToString(path, &content)) {
NOTREACHED();
}
return content;
}
class DataSerializer : public ImportantFileWriter::DataSerializer {
public:
explicit DataSerializer(const std::string& data) : data_(data) {
}
virtual bool SerializeData(std::string* output) OVERRIDE {
output->assign(data_);
return true;
}
private:
const std::string data_;
};
} // namespace
class ImportantFileWriterTest : public testing::Test {
public:
ImportantFileWriterTest() { }
virtual void SetUp() {
ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
file_ = temp_dir_.path().AppendASCII("test-file");
}
protected:
FilePath file_;
MessageLoop loop_;
private:
ScopedTempDir temp_dir_;
};
TEST_F(ImportantFileWriterTest, Basic) {
ImportantFileWriter writer(file_, MessageLoopProxy::current().get());
EXPECT_FALSE(PathExists(writer.path()));
writer.WriteNow("foo");
RunLoop().RunUntilIdle();
ASSERT_TRUE(PathExists(writer.path()));
EXPECT_EQ("foo", GetFileContent(writer.path()));
}
TEST_F(ImportantFileWriterTest, ScheduleWrite) {
ImportantFileWriter writer(file_, MessageLoopProxy::current().get());
writer.set_commit_interval(TimeDelta::FromMilliseconds(25));
EXPECT_FALSE(writer.HasPendingWrite());
DataSerializer serializer("foo");
writer.ScheduleWrite(&serializer);
EXPECT_TRUE(writer.HasPendingWrite());
MessageLoop::current()->PostDelayedTask(
FROM_HERE,
MessageLoop::QuitWhenIdleClosure(),
TimeDelta::FromMilliseconds(100));
MessageLoop::current()->Run();
EXPECT_FALSE(writer.HasPendingWrite());
ASSERT_TRUE(PathExists(writer.path()));
EXPECT_EQ("foo", GetFileContent(writer.path()));
}
TEST_F(ImportantFileWriterTest, DoScheduledWrite) {
ImportantFileWriter writer(file_, MessageLoopProxy::current().get());
EXPECT_FALSE(writer.HasPendingWrite());
DataSerializer serializer("foo");
writer.ScheduleWrite(&serializer);
EXPECT_TRUE(writer.HasPendingWrite());
writer.DoScheduledWrite();
MessageLoop::current()->PostDelayedTask(
FROM_HERE,
MessageLoop::QuitWhenIdleClosure(),
TimeDelta::FromMilliseconds(100));
MessageLoop::current()->Run();
EXPECT_FALSE(writer.HasPendingWrite());
ASSERT_TRUE(PathExists(writer.path()));
EXPECT_EQ("foo", GetFileContent(writer.path()));
}
TEST_F(ImportantFileWriterTest, BatchingWrites) {
ImportantFileWriter writer(file_, MessageLoopProxy::current().get());
writer.set_commit_interval(TimeDelta::FromMilliseconds(25));
DataSerializer foo("foo"), bar("bar"), baz("baz");
writer.ScheduleWrite(&foo);
writer.ScheduleWrite(&bar);
writer.ScheduleWrite(&baz);
MessageLoop::current()->PostDelayedTask(
FROM_HERE,
MessageLoop::QuitWhenIdleClosure(),
TimeDelta::FromMilliseconds(100));
MessageLoop::current()->Run();
ASSERT_TRUE(PathExists(writer.path()));
EXPECT_EQ("baz", GetFileContent(writer.path()));
}
} // namespace base
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