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The Given-When-Then formula is a template intended to guide the writing of acceptance tests for a User Story: (Given) some context (When) some action is carried out (Then) a particular set of observable consequences should obtain; An example: Given my bank account is in credit, and I made no withdrawals recently,
Historical Examples. 1  The party is the final arbiter regarding the acceptability of work for publication. 2  The acceptability of Mr. Mallory to the people, at the outset of his career, has been noted. 3  The same considerations and the same safeguard apply with respect to acceptability of the consequences.