You use a ‘test’ method as a kind of benchmark to see ‘how well they can do’, at this moment, and you’re moving on to the nextr lesson without any adaptions.

Learners are provided the chance to self-assess, in order to monitor their own learning, by students reflecting on their own learning and making adjustments so that they achieve deeper understanding.

You use a ‘test’ method so that you can see what students do and don’t know, at this moment, so that you can more accurately plan/adapt your future lessons and activities.