public void TestUpdateCouponExpirationDate() { var date = new DateTime(2017, 10, 10, 10, 20, 4); var coupon = wheelService.UpdateCouponExpirationDate( new Coupon { Id = 1, Active = true, Code = "ASDFG12345", DateCreated = new DateTime(2017, 10, 10, 8, 23, 4), DateExpired = new DateTime(2016, 12, 10, 8, 23, 4), DateExchanged = new DateTime(2017, 11, 11, 8, 23, 4), Value = new CouponValue { Id = 1, Value = 10 }, User = user }, date); Assert.True(date == coupon.DateExpired); }