public void Test_GetLastWriteTimeUtc()
{
var storage = new DiskIsolateStorage("Test", baseDirectory);
storage.InitStore();
string storePath = Path.Combine(baseDirectory, "Test");
//创建目录
string dir = "Test" + Guid.NewGuid().ToString();
storage.CreateDirectory(dir);
//在目录里创建文件
string testString = "This is teststring";
MemoryStream stream = new MemoryStream();
byte[] buffer = Encoding.Default.GetBytes(testString);
stream.Write(buffer, 0, 18);
var filePath = dir + "/" + Guid.NewGuid().ToString() + ".txt";
storage.CreateFile(filePath, stream);
//修改文件内容
FileStream fs = File.Open(Path.Combine(storePath, filePath), FileMode.Open);
Byte[] info = new UTF8Encoding(true).GetBytes("This is some text in the file.");
fs.Write(info, 0, info.Length);
fs.Close();
var dirLastWriteTime = Directory.GetLastWriteTimeUtc(Path.Combine(storePath, dir));
var fileLastWriteTime = File.GetLastWriteTimeUtc(Path.Combine(storePath, filePath));
var dirResult = storage.GetLastWriteTimeUtc(dir);
var fileResult = storage.GetLastWriteTimeUtc(filePath);
Assert.AreEqual(dirLastWriteTime, dirResult);
Assert.AreEqual(fileLastWriteTime, fileResult);
}