public void FindUnassignedEditPositionInRange()
{
var maskedTextProvider = new MaskedTextProvider(TestSimpleDigitMask);
maskedTextProvider.Set("12");
Assert.Equal(3, maskedTextProvider.FindUnassignedEditPositionInRange(0, 5, true));
Assert.Equal(5, maskedTextProvider.FindUnassignedEditPositionInRange(0, 5, false));
}