public void should_give_false_if_input_is_bad(string zip)
{
var z = new ZipCodeService();
bool result = z.Validate(zip);
Assert.AreEqual(false, result);
}
public void should_give_false_if_input_is_null()
{
var z = new ZipCodeService();
bool result = z.Validate(null);
Assert.AreEqual(false, result);
}
public void should_give_true_if_input_is_nnn_nn(string zipcode)
{
var z = new ZipCodeService();
bool result = z.Validate(zipcode);
Assert.AreEqual(true, result);
}