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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | pest()->group('integration'); |
| 6 | |
| 7 | use Phexium\Plugin\Clock\Adapter\FrozenClock; |
| 8 | use Phexium\Plugin\Clock\Adapter\MonotonicClock; |
| 9 | use Phexium\Plugin\Clock\Adapter\OffsetClock; |
| 10 | use Phexium\Plugin\Clock\Port\ClockInterface; |
| 11 | |
| 12 | describe('Time retrieval', function (): void { |
| 13 | it('returns inner clock time on first call', function (): void { |
| 14 | $inner = new FrozenClock('2024-01-15 10:30:00'); |
| 15 | $clock = new MonotonicClock($inner); |
| 16 | |
| 17 | $result = $clock->now(); |
| 18 | |
| 19 | expect($result)->toEqual(new DateTimeImmutable('2024-01-15 10:30:00')); |
| 20 | }); |
| 21 | |
| 22 | it('returns inner clock time when time advances', function (): void { |
| 23 | $inner = new OffsetClock(new FrozenClock('2024-01-15 10:30:00')); |
| 24 | $clock = new MonotonicClock($inner); |
| 25 | |
| 26 | $clock->now(); |
| 27 | |
| 28 | $inner->advanceSeconds(1); |
| 29 | $result = $clock->now(); |
| 30 | |
| 31 | expect($result)->toEqual(new DateTimeImmutable('2024-01-15 10:30:01')); |
| 32 | }); |
| 33 | }); |
| 34 | |
| 35 | describe('Monotonicity', function (): void { |
| 36 | it('increments by microsecond when time is equal', function (): void { |
| 37 | $inner = new FrozenClock('2024-01-15 10:30:00.000000'); |
| 38 | $clock = new MonotonicClock($inner); |
| 39 | |
| 40 | $first = $clock->now(); |
| 41 | $second = $clock->now(); |
| 42 | |
| 43 | expect($second)->toBeGreaterThan($first); |
| 44 | expect($second)->toEqual(new DateTimeImmutable('2024-01-15 10:30:00.000000')->modify('+1 microsecond')); |
| 45 | }); |
| 46 | |
| 47 | it('increments by microsecond when time goes backward', function (): void { |
| 48 | $sequence = [ |
| 49 | new DateTimeImmutable('2024-01-15 10:30:00'), |
| 50 | new DateTimeImmutable('2024-01-15 10:29:59'), |
| 51 | ]; |
| 52 | $index = 0; |
| 53 | $inner = new class($sequence, $index) implements ClockInterface { |
| 54 | public function __construct( |
| 55 | private readonly array $sequence, |
| 56 | private int $index, |
| 57 | ) {} |
| 58 | |
| 59 | #[Override] |
| 60 | public function now(): DateTimeImmutable |
| 61 | { |
| 62 | return $this->sequence[$this->index++]; |
| 63 | } |
| 64 | }; |
| 65 | |
| 66 | $clock = new MonotonicClock($inner); |
| 67 | |
| 68 | $first = $clock->now(); |
| 69 | $second = $clock->now(); |
| 70 | |
| 71 | expect($second)->toBeGreaterThan($first); |
| 72 | expect($second)->toEqual(new DateTimeImmutable('2024-01-15 10:30:00')->modify('+1 microsecond')); |
| 73 | }); |
| 74 | |
| 75 | it('guarantees strictly increasing time over multiple calls', function (): void { |
| 76 | $inner = new FrozenClock('2024-01-15 10:30:00.000000'); |
| 77 | $clock = new MonotonicClock($inner); |
| 78 | |
| 79 | $times = []; |
| 80 | |
| 81 | for ($i = 0; $i < 5; ++$i) { |
| 82 | $times[] = $clock->now(); |
| 83 | } |
| 84 | $counter = count($times); |
| 85 | |
| 86 | for ($i = 1; $i < $counter; ++$i) { |
| 87 | expect($times[$i])->toBeGreaterThan($times[$i - 1]); |
| 88 | } |
| 89 | }); |
| 90 | }); |