Test-Driven Java Development, Second Edition - Second Edition

Requirement – detecting obstacles

We're almost done. This is the last requirement.

Even though most of the Earth is covered in water (approximately 70%), there are continents and islands that can be considered as obstacles for our remotely-controlled ship. We should have a way to detect whether our next move would hit one of those obstacles. If such a thing happens, the move should be aborted and the ship should stay on the current position and report the obstacle.

Implement surface detection before each move to a new position. If a command encounters a surface, the ship aborts the move, stays on the current position, and reports the obstacle.

The specifications and the implementation of this requirement are very similar to those we did ...