Autozone warranty a ****

I bought a battery from auto zone last year 27 June yesterday the battery died was I couldn't do anything cause it had no power I someone jumped me when the car switched off the battery was died put in another one the Car was fine, today I go to autozone Tembisa they tell me the battery is OK their testing machine has so what nonsense when remove the terminals the engine does not stop running but you tell call car is not charging, honestly I hate the service because that means I need to sleep in middle of nowhere why give us warranty if its gonna an issue when come back with problems