rector/tests/AbstractConfigurableContainerAwareTestCase.php

<?php declare(strict_types=1);

namespace Rector\Tests;

use PHPUnit\Framework\TestCase;
use Psr\Container\ContainerInterface;
use Rector\DependencyInjection\ContainerFactory;

abstract class AbstractConfigurableContainerAwareTestCase extends TestCase
{
    /**
     * @var ContainerInterface
     */
    protected $container;

    /**
     * Constructs a test case with the given name.
     *
     * @param mixed[] $data
     */
    public function __construct(?string $name = null, array $data = [], string $dataName = '')
    {
        $this->container = (new ContainerFactory())->createWithConfigFiles([$this->provideConfig()]);

        parent::__construct($name, $data, $dataName);
    }

    abstract protected function provideConfig(): string;
}