/**
* Executes instructions.
*
* @throws ImpossibleMoveException
* @throws UnknownInstructionException
*/
public function executeInstructions()
{
foreach ($this->instructions as $instruction) {
if (in_array($instruction, $this->allowedActions)) {
if (!$this->plateau->isMovePossible($this->xPosition, $this->yPosition, $this->orientation)) {
throw new ImpossibleMoveException('Move is not possible - new position is out of the grid.');
}
list($newXCoordinate, $newYCoordinate) = $this->plateau->move($this->xPosition, $this->yPosition, $this->orientation);
$this->xPosition = $newXCoordinate;
$this->yPosition = $newYCoordinate;
} elseif (in_array($instruction, $this->allowedTurnDirections)) {
$this->orientation = $this->plateau->turn($this->orientation, $instruction);
} else {
throw new UnknownInstructionException('Unknown instruction.');
}
}
}
public function testTurn()
{
$plateau = new Plateau(5, 5);
$this->assertEquals(Plateau::NORTH, $plateau->turn(Plateau::EAST, Plateau::LEFT));
$this->assertEquals(Plateau::WEST, $plateau->turn(Plateau::NORTH, Plateau::LEFT));
$this->assertEquals(Plateau::SOUTH, $plateau->turn(Plateau::WEST, Plateau::LEFT));
$this->assertEquals(Plateau::EAST, $plateau->turn(Plateau::SOUTH, Plateau::LEFT));
$this->assertEquals(Plateau::SOUTH, $plateau->turn(Plateau::EAST, Plateau::RIGHT));
$this->assertEquals(Plateau::EAST, $plateau->turn(Plateau::NORTH, Plateau::RIGHT));
$this->assertEquals(Plateau::NORTH, $plateau->turn(Plateau::WEST, Plateau::RIGHT));
$this->assertEquals(Plateau::WEST, $plateau->turn(Plateau::SOUTH, Plateau::RIGHT));
}
