Chapter 11. System Boundary
“You cannot always control what goes on outside. But you can always control what goes on inside.”
Wayne Dyer
The triad works on stories that involve interfaces to external systems. Tom explicates on test doubles and mocks.
External Interfaces
Debbie starts off, “Now that we’ve determined correctly how much to charge the customer, let’s move on to the Submit Charge story. I see the high-level tests for this were as follows.”
“Cathy, would you explain how charging works,” Debbie asked.
Cathy answers. “I’ve talked with my bank and the credit-card processing company. The rental system needs ...
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