public void getBillHistoryByUserId()
{
string userName = "******";
List <Bill> bills = ServicesTestConstant.getBills();
_billRepository.Setup(b => b.FindAllByUserNameAndIsDeliveryPaidTrue(userName)).Returns(bills);
List <BillModel> result = _billService.GetBillHistoryByUserName(userName);
_billRepository.Verify(place => place.FindAllByUserNameAndIsDeliveryPaidTrue(It.IsAny <string>()), Times.Once());
Assert.AreEqual(ServicesTestConstant.getBillDto(), result[0]);
Assert.AreEqual(bills.Count, result.Count);
}