public async Task should_delete_stale_payments()
{
// Arrange
var mockedCreditCardTotal = 20;
var existing = PaymentMocks.PaymentList(PaymentMocks.SpendingAccountPayment(20));
_oc.Payments.ListAsync <HSPayment>(OrderDirection.Incoming, mockOrderID)
.Returns(Task.FromResult(existing));
var requested = PaymentMocks.Payments(PaymentMocks.CCPayment(creditcard1));
// Act
var result = await _sut.SavePayments(mockOrderID, requested, mockUserToken);
// Assert
await _oc.Payments.Received().DeleteAsync(OrderDirection.Incoming, mockOrderID, mockSpendingAccountID);
await _oc.Payments.Received().CreateAsync <HSPayment>(OrderDirection.Outgoing, mockOrderID, Arg.Is <HSPayment>(p => p.ID == mockCCPaymentID && p.Type == PaymentType.CreditCard && p.Amount == mockedCreditCardTotal), mockUserToken);
}