public void TestCopy(){
GridFile fs = new GridFile(DB, "gfcopy");
GridFileStream gfs = fs.Create("original.txt");
gfs.WriteByte(1);
gfs.Seek(1024 * 256 * 2, SeekOrigin.Begin);
gfs.WriteByte(2);
gfs.Close();
fs.Copy("original.txt", "copy.txt");
Assert.IsTrue(fs.Exists("original.txt"));
Assert.IsTrue(fs.Exists("copy.txt"));
//TODO Assert chunk data is the same too.
}