public void File_Copy()
{
const string contents = "test";
var fn = GetNewFileNameOnTempPath(".txt");
var fnInfo = FileSystem.FileFromPath(fn);
System.IO.File.WriteAllText(fn, contents);
Assert.IsTrue(System.IO.File.Exists(fn));
var dest = GetNewFileNameOnTempPath(".txt");
var destInfo = FileSystem.FileFromPath(dest);
Assert.IsTrue(FileSystem.CopyFile(fnInfo, dest));
Assert.IsTrue(System.IO.File.Exists(dest));
Assert.IsTrue(System.IO.File.Exists(fn));
Assert.AreEqual(contents, FileSystem.ReadText(fnInfo));
Assert.AreEqual(contents, FileSystem.ReadText(destInfo));
}