A driving lesson is an example of a formative assessment as the instructor is appraising the performance of the pupil in order to provide feedback on their performance. The purpose of a driving lesson is for the pupil to learn from the feedback and, during future lessons, put into practice any advice that has been given.
A driving test is an example of a summative assessment as the examiner is appraising the performance of the candidate in order to make a decision regarding their competence to drive safely.
In both cases, the learner’s environment is the same, as is the dynamic of the situation (their performance is being observed by someone more experienced).
However, the purpose of each encounter is very different, and identifying the nature of the encounter beforehand is important for both parties if its objectives are to be achieved.
If driving lessons and driving tests suffered from a lack of clarity regarding their purpose, it would soon become apparent that this was undermining their principal intention! For example, if you have just passed your driving test, you may not be particularly concerned with very specific feedback that the examiner is giving you regarding two minor faults. Similarly, if you are having your first driving lesson, you will probably not be concerned by the suggestion that you are not currently competent to drive independently.