public function setUp()
{
$elevator = new Elevator();
$this->parser = new InstructionParser($elevator);
$this->floorObserver = new FloorObserver($this->parser);
$elevator->attach($this->floorObserver);
}
protected function execute(InputInterface $input, OutputInterface $output)
{
$elevator = new Elevator();
$instructionParser = new InstructionParser($elevator);
$floorObserver = new FloorObserver($instructionParser);
$elevator->attach($floorObserver);
$instructions = file_get_contents(__DIR__ . '/instructions.txt');
$instructionParser->parseInstructions($instructions);
$output->writeln('Puzzle 2 answer: ' . $floorObserver->getInstructionNumber());
}
