protected function execute(InputInterface $input, OutputInterface $output)
{
$instructions = file_get_contents(__DIR__ . '/instructions.txt');
$elevator = new Elevator();
$instructionParser = new InstructionParser($elevator);
$instructionParser->parseInstructions($instructions);
$output->writeln('Puzzle 1 answer: ' . $elevator->getFloor());
}
/**
* Receive update from subject
*
* @link http://php.net/manual/en/splobserver.update.php
*
* @param SplSubject $elevator
*
* @internal param SplSubject $subject <p>
* The <b>SplSubject</b> notifying the observer of an update.
* </p>
*
* @since 5.1.0
*/
public function update(SplSubject $elevator)
{
if (!$elevator instanceof Elevator) {
return;
}
if (empty($this->instructionNumber) && $elevator->getFloor() == -1) {
$this->instructionNumber = $this->instructionParser->getInstructionCount();
}
}
/**
* Receive update from subject
* @link http://php.net/manual/en/splobserver.update.php
*
* @param SplSubject $elevator <p>
* The <b>SplSubject</b> notifying the observer of an update.
* </p>
*
* @return void
* @since 5.1.0
*/
public function update(SplSubject $elevator)
{
if ($elevator instanceof Elevator) {
if ($elevator->getFloor() == -1) {
if (is_null($this->instructionNumber)) {
$this->instructionNumber = $this->parser->getInstructionCount();
}
}
}
}
public function it_only_records_the_instruction_position_when_entering_basement_for_the_first_time(InstructionParser $parser, Elevator $elevator)
{
$position = random_int(1, 1000);
$parser->getInstructionPosition()->willReturn($position);
$elevator->getFloor()->willReturn(-1);
$this->update($elevator);
$this->getInstructionPosition()->shouldBe($position);
$parser->getInstructionPosition()->willReturn($position * 2);
$this->update($elevator);
$this->getInstructionPosition()->shouldBe($position);
}
public function it_should_store_only_the_first_instruction_for_basement_entry(InstructionParser $parser, Elevator $elevator)
{
$count = rand(1, 10000);
$parser->getInstructionCount()->willReturn($count);
$elevator->getFloor()->willReturn(-1);
$this->update($elevator);
$this->getInstructionNumber()->shouldBe($count);
$parser->getInstructionCount()->willReturn($count * 2);
$this->update($elevator);
$this->getInstructionNumber()->shouldBe($count);
}
/**
* @test
* @dataProvider getInstructions
*/
public function close_causes_entering_basement_at_position_one(string $instructions, int $expectedPosition)
{
$this->parser->parseInstructions($instructions);
static::assertEquals($expectedPosition, $this->floorObserver->getInstructionPosition());
}