/**
* @param integer $steps
*
* @throws DomainException If the token is already finished.
*/
public function move($steps)
{
if ($this->isFinished()) {
throw new DomainException('Once a token has finished, it cannot be moved again.');
}
$this->square = $this->square->occupyNext($steps);
}
/** @test */
public function squareOccupied()
{
$this->start->occupyNext(1);
$this->assertTrue($this->start->get(1)->isOccupied());
}