You’re part of the team that explores Mars by sending remotely controlled vehicles to the surface of the planet. Develop an API that translates the commands sent from earth to instructions that are understood by the rover.
Given I have a Mars Rover
When I set the initial starting point to 0,0
And I set the initial direction to ${direction}
And I move the Mars Rover forward 1 square
Soon the current position should be ${x},${y}
| direction | x | y |
|---|---|---|
| N | 0 | -1 |
| S | 0 | 1 |
| E | 1 | 0 |
| W | -1 | 0 |
Given I have a Mars Rover
When I set the initial starting point to 0,0
And I set the initial direction to ${direction}
And I move the Mars Rover backward 1 square
Soon the current position should be ${x},${y}
| direction | x | y |
|---|---|---|
| N | 0 | 1 |
| S | 0 | -1 |
| E | -1 | 0 |
| W | 1 | 0 |
If a given sequence of commands encounters an obstacle, the rover moves up to the last possible point, aborts the sequence and reports the obstacle.
Given I have a Mars Rover
And there is an obstacle at 0,-5
When I set the initial starting point to 0,0
And I set the initial direction to N
And I move the Mars Rover forward 10 squares
The Rover will encounter the obstacle.
Soon the current position should be 0,-4
Then the Mars Rover should report an obstacle at 0,-5