public void GivenRentalRepository_WhenAddRentalToDB_ThenNewRentalInRentalDB() { //Given Rental testRental = new Rental() { UserId = "LP_21051987", Isbn = "isbnTest" }; //When _rentalRepository.AddRentalToDB(testRental); //Then Assert.Contains(testRental, DBRentals.DBRental); }