rector/packages/Testing/PHPUnit/AbstractTestCase.php

<?php

declare(strict_types=1);

namespace Rector\Testing\PHPUnit;

use PHPUnit\Framework\TestCase;
use Rector\Core\Exception\ShouldNotHappenException;
use Rector\Core\HttpKernel\RectorKernel;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symplify\SmartFileSystem\SmartFileInfo;

abstract class AbstractTestCase extends TestCase
{
    /**
     * @var array<string, RectorKernel>
     */
    private static $kernelsByHash = [];

    /**
     * @var ContainerInterface
     */
    private static $currentContainer;

    protected function boot(): void
    {
        $this->bootFromConfigFileInfos([]);
    }

    /**
     * @param SmartFileInfo[] $configFileInfos
     */
    protected function bootFromConfigFileInfos(array $configFileInfos): void
    {
        $configsHash = $this->createConfigsHash($configFileInfos);

        if (isset(self::$kernelsByHash[$configsHash])) {
            $rectorKernel = self::$kernelsByHash[$configsHash];
            self::$currentContainer = $rectorKernel->getContainer();
        } else {
            $rectorKernel = new RectorKernel('test_' . $configsHash, true, $configFileInfos);
            $rectorKernel->boot();

            self::$kernelsByHash[$configsHash] = $rectorKernel;
            self::$currentContainer = $rectorKernel->getContainer();
        }
    }

    /**
     * Syntax-sugar to remove static
     *
     * @template T of object
     * @param class-string<T> $type
     * @return T
     */
    protected function getService(string $type): object
    {
        if (self::$currentContainer === null) {
            throw new ShouldNotHappenException('First, create container with "bootWithConfigFileInfos([...])"');
        }

        return self::$currentContainer->get($type);
    }

    /**
     * @param SmartFileInfo[] $configFileInfos
     */
    private function createConfigsHash(array $configFileInfos): string
    {
        $configHash = '';
        foreach ($configFileInfos as $configFileInfo) {
            $configHash .= md5_file($configFileInfo->getRealPath());
        }

        return $configHash;
    }
}