public void T01_AppendToFileName()
{
Assert.AreEqual("C:/foo-2.txt", PathUtility.AppendToFileName("C:/foo.txt", "-2"));
Assert.AreEqual("foo-2.txt", PathUtility.AppendToFileName("foo.txt", "-2"));
Assert.AreEqual("/foo.bar-2.txt", PathUtility.AppendToFileName("/foo.bar.txt", "-2"));
}