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<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\Runner\GarbageCollection;

use function gc_collect_cycles;
use function gc_disable;
use function gc_enable;
use PHPUnit\Event\EventFacadeIsSealedException;
use PHPUnit\Event\Facade;
use PHPUnit\Event\UnknownSubscriberTypeException;

/**
 * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
 *
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class GarbageCollectionHandler
{
    private readonly Facade $facade;
    private readonly int $threshold;
    private int $tests = 0;

/**
     * @throws EventFacadeIsSealedException
     * @throws UnknownSubscriberTypeException
     */
    public function __construct(Facade $facade, int $threshold)
    {
        $this->facade    = $facade;
        $this->threshold = $threshold;

$this->registerSubscribers();
    }

public function executionStarted(): void
    {
        gc_disable();

$this->facade->emitter()->testRunnerDisabledGarbageCollection();

gc_collect_cycles();

$this->facade->emitter()->testRunnerTriggeredGarbageCollection();
    }

public function executionFinished(): void
    {
        gc_collect_cycles();

$this->facade->emitter()->testRunnerTriggeredGarbageCollection();

gc_enable();

$this->facade->emitter()->testRunnerEnabledGarbageCollection();
    }

public function testFinished(): void
    {
        $this->tests++;

if ($this->tests === $this->threshold) {
            gc_collect_cycles();

$this->facade->emitter()->testRunnerTriggeredGarbageCollection();

$this->tests = 0;
        }
    }

/**
     * @throws EventFacadeIsSealedException
     * @throws UnknownSubscriberTypeException
     */
    private function registerSubscribers(): void
    {
        $this->facade->registerSubscribers(
            new ExecutionStartedSubscriber($this),
            new ExecutionFinishedSubscriber($this),
            new TestFinishedSubscriber($this),
        );
    }
}

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