public void IssueDiscountBadInputsTest()
{
var mock = new Mock<IDiscountService>();
discountTest.discountService = mock.Object;
// sets IsValid in the controller to false
discountTest.ModelState.AddModelError("don't work", "alrights.");
var json = (JsonResult)discountTest.IssueDiscount(badCoupon);
// UserDiscount returnedDiscount = (UserDiscount)json.Data;
// verify the returned object matches object sent in
// (if test IsValid was true, returnedDiscount would be null)
Assert.IsInstanceOfType(json, typeof(JsonResult));
}