public override void Execute(IRover rover, Instruction instruction)
{
switch(instruction.GetInstruction())
{
case Instruction.TurnLeft:
rover.SetFacing(West);
break;
case Instruction.TurnRight:
rover.SetFacing(East);
break;
case Instruction.MoveForward:
rover.MoveNorth();
break;
default:
throw new ArgumentException("Incorrect facing code.");
}
}
