public async void Add_CustomerRepositorySucceeds_ExpectedCallsWereMade()
{
// Arrange
var customerToAdd = CreateRandomCustomer();
var customerRepositoryMock = new CustomerRepositoryMock();
customerRepositoryMock.SetupAddReturns(customerToAdd);
var customerService = CreateCustomerService(customerRepositoryMock);
// Act
await customerService.Add(customerToAdd);
// Assert
customerRepositoryMock.VerifyOnlyAddWasCalledOnce(customerToAdd);
}
public async void Add_CustomerRepositoryReturnsNull_ThrowsExceptionAndExpectedCallsWereMade()
{
// Arrange
Customer customerToAdd = null;
const string expectedExceptionMessage = "An error occurred when trying to add the customer.";
var customerRepositoryMock = new CustomerRepositoryMock();
customerRepositoryMock.SetupAddReturns(customerToAdd);
var customerService = CreateCustomerService(customerRepositoryMock);
// Act
var exception = await Record.ExceptionAsync(() => customerService.Add(customerToAdd));
// Assert
VerifyException <Exception>(exception, expectedExceptionMessage);
customerRepositoryMock.VerifyOnlyAddWasCalledOnce(customerToAdd);
}