public void CanValidate ()
{
TimeSpan t = new TimeSpan (1000);
TimeSpanValidator v = new TimeSpanValidator (t, t);
Assert.IsTrue (v.CanValidate (typeof (TimeSpan)), "A1");
Assert.IsFalse (v.CanValidate (typeof (int)), "A2");
Assert.IsFalse (v.CanValidate (typeof (long)), "A3");
}