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<?php declare(strict_types=1); |
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namespace Stratadox\Clock; |
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use DateInterval; |
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use DateTimeInterface; |
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/** |
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* SneakyTestClock. This clock is very sneaky. Only use it in your test code. |
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* The basic idea is you inject a clock into your service, in production that's |
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* a regular clock, and for testing you can inject this one instead and simulate |
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* the passing of time by altering the clock instance(s). |
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* |
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* @author Stratadox |
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*/ |
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final class SneakyTestClock implements RewindableClock |
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{ |
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/** @var RewindableClock */ |
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private $clock; |
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private static $rewinds; |
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private static $fastForwards; |
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private static $sneaky; |
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private function __construct(RewindableClock $clock) |
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{ |
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$this->clock = $clock; |
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self::$rewinds = []; |
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self::$fastForwards = []; |
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self::$sneaky = null; |
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} |
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public static function create(): self |
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{ |
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return new self(RewindableDateTimeClock::create()); |
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} |
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public static function using(RewindableClock $clock): self |
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{ |
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return new self($clock); |
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} |
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public function now(): DateTimeInterface |
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{ |
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$datetime = (self::$sneaky ?: $this->clock)->now(); |
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foreach (self::$rewinds as $rewind) { |
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$datetime = $datetime->sub($rewind); |
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} |
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foreach (self::$fastForwards as $fastForward) { |
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$datetime = $datetime->add($fastForward); |
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} |
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return $datetime; |
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} |
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public function rewind(DateInterval $interval): RewindableClock |
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{ |
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$new = clone $this; |
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$new->clock = $this->clock->rewind($interval); |
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return $new; |
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} |
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public function fastForward(DateInterval $interval): RewindableClock |
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{ |
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$new = clone $this; |
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$new->clock = $this->clock->fastForward($interval); |
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return $new; |
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} |
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public function sneakilySetClock(RewindableClock $clock): void |
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{ |
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self::$sneaky = $clock; |
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} |
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public function sneakBack(DateInterval $interval): void |
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{ |
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self::$rewinds[] = $interval; |
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} |
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public function sneakForwards(DateInterval $interval): void |
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{ |
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self::$fastForwards[] = $interval; |
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} |
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} |
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Stratadox /
Clock
