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// Copyright (c) 2009 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 "chrome/common/important_file_writer.h"
#include "base/compiler_specific.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/scoped_temp_dir.h"
#include "base/thread.h"
#include "base/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
std::string GetFileContent(const FilePath& path) {
std::string content;
if (!file_util::ReadFileToString(path, &content)) {
NOTREACHED();
}
return content;
}
} // namespace
class ImportantFileWriterTest : public testing::Test {
public:
virtual void SetUp() {
ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
file_ = temp_dir_.path().AppendASCII("test-file");
}
protected:
FilePath file_;
private:
MessageLoop loop_;
ScopedTempDir temp_dir_;
};
TEST_F(ImportantFileWriterTest, WithoutBackendThread) {
ImportantFileWriter writer(file_, NULL);
EXPECT_FALSE(file_util::PathExists(writer.path()));
writer.WriteNow("foo");
ASSERT_TRUE(file_util::PathExists(writer.path()));
EXPECT_EQ("foo", GetFileContent(writer.path()));
}
TEST_F(ImportantFileWriterTest, WithBackendThread) {
base::Thread thread("file_writer_test");
ASSERT_TRUE(thread.Start());
ImportantFileWriter writer(file_, &thread);
EXPECT_FALSE(file_util::PathExists(writer.path()));
writer.WriteNow("foo");
thread.Stop(); // Blocks until all tasks are executed.
ASSERT_TRUE(file_util::PathExists(writer.path()));
EXPECT_EQ("foo", GetFileContent(writer.path()));
}
TEST_F(ImportantFileWriterTest, ScheduleWrite) {
ImportantFileWriter writer(file_, NULL);
writer.set_commit_interval(base::TimeDelta::FromMilliseconds(25));
writer.ScheduleWrite("foo");
MessageLoop::current()->PostDelayedTask(FROM_HERE,
new MessageLoop::QuitTask(), 100);
MessageLoop::current()->Run();
ASSERT_TRUE(file_util::PathExists(writer.path()));
EXPECT_EQ("foo", GetFileContent(writer.path()));
}
TEST_F(ImportantFileWriterTest, BatchingWrites) {
ImportantFileWriter writer(file_, NULL);
writer.set_commit_interval(base::TimeDelta::FromMilliseconds(25));
writer.ScheduleWrite("foo");
writer.ScheduleWrite("bar");
writer.ScheduleWrite("baz");
MessageLoop::current()->PostDelayedTask(FROM_HERE,
new MessageLoop::QuitTask(), 100);
MessageLoop::current()->Run();
ASSERT_TRUE(file_util::PathExists(writer.path()));
EXPECT_EQ("baz", GetFileContent(writer.path()));
}
TEST_F(ImportantFileWriterTest, WriteOnDestruction) {
{
ImportantFileWriter writer(file_, NULL);
writer.ScheduleWrite("foo");
}
ASSERT_TRUE(file_util::PathExists(file_));
EXPECT_EQ("foo", GetFileContent(file_));
}
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