Mars Rover implementation exercise

Description

In this exercise we'll implement from scratch part of the Mars Rover kata.

This is a summary of the part of the behavior of the rover that we'll implement:

• It's located on a grid at some point with coordinates (x,y) and facing a direction encoded with a character.

• The meaning of each direction character is:

  • N -> North
  • S -> South
  • E -> East
  • W -> West

• The rover receives a sequence of commands (a string of characters) which are codified in the following way:

  • When it receives an f, it moves forward one position in the direction it is facing.
  • When it receives a b, it moves backward one position in the direction it is facing.
  • When it receives a l, it turns left changing its direction (by one step in the direction).
  • When it receives a r, it turns right changing its direction (by one step in the direction).