Timing deserves its own test

A notification that appears at the right place but the wrong moment can feel just as broken as one that never arrives. Test the approach, the arrival, and the moment after a destination with a route that gives each state room to happen.

Create useful checkpoints

Pick landmarks or turns where you expect the experience to change. Those checkpoints make it easier to notice whether a prompt arrives too early, too late, or repeatedly. Keep notes on the distance and movement state around each trigger.

A real-road route gives every checkpoint a believable context, helping your team discuss the behavior in terms everyone understands.