public void AddCustomerToMasterList_ShouldSucceed() { //Arrange Customer customer = new Customer("Kevin", "Curnow", "123 Soft Skills Lane", "Carmel, IN", 46032, CustomerType.Potential); //Act _customerService.AddCustomerToList(customer); var actuaList = _customerService._customerList; var expectedList = new List <Customer> { customer }; //Assert CollectionAssert.AreEqual(expectedList, actuaList); }