When considering how to set up the state of the application for an acceptance test, it is helpful to distinguish between three kinds of data. 1. Test-specific data: This is the data that drives the behavior under test. It represents the specifics of the case under test. 2. Test reference data: There is often a second class of data that is relevant for a test but actually has little bearing upon the behavior under test. It needs to be there, but it is part of the supporting cast, not the main player. 3. Application reference data: Often, there is data that is irrelevant to the behavior under
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