public void CanConvertFrom ()
{
TimeSpanSecondsOrInfiniteConverter cv = new TimeSpanSecondsOrInfiniteConverter ();
Assert.IsTrue (cv.CanConvertFrom (null, typeof (string)), "A1");
Assert.IsFalse (cv.CanConvertFrom (null, typeof (TimeSpan)), "A2");
Assert.IsFalse (cv.CanConvertFrom (null, typeof (int)), "A3");
Assert.IsFalse (cv.CanConvertFrom (null, typeof (object)), "A4");
}