Writingacceptancetestsearlyisarequirements-engineeringtechniquethatcansavebusinessestimeandmoneyandhelpthembetterrespondtochange.Anequivalencehypothesisstatesthatconcreterequirementsblendwithacceptancetestssothatyoushouldbeabletospecifyandverifysystembehaviorusingtests.Severalexamples