Testing on the Toilet: Don’t Overuse Mocks

"Sometimes you can't use a real dependency in a test (e.g. if it's too slow or talks over the network), but there may better options than using mocks" Often the easiest solution is to refactor interfaces. In this case, the PaymentProcessor probably shouldn't be searching so deep into the CreditCardServer's dependencies. One possibility is to create a TransactionCreditCardServer that wraps communic