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DirectoryLoader example

use Symfony\Component\Routing\Tests\Fixtures\TraceableAnnotationClassLoader;

class DirectoryLoaderTest extends TestCase
{
    private DirectoryLoader $loader;

    protected function setUp(): void
    {
        parent::setUp();

        $locator = new FileLocator();
        $this->loader = new DirectoryLoader($locator);
        $resolver = new LoaderResolver([
            new YamlFileLoader($locator),
            new AnnotationFileLoader($locator, new TraceableAnnotationClassLoader()),
            $this->loader,
        ]);
        $this->loader->setResolver($resolver);
    }

    public function testLoadDirectory()
    {
        $collection = $this->loader->load(__DIR__.'/../Fixtures/directory', 'directory');

private function createContainerLoader(ContainerBuilder $container, string $env): DelegatingLoader
    {
        $buildDir = $container->getParameter('kernel.build_dir');
        $locator = new FileLocator();
        $resolver = new LoaderResolver([
            new XmlFileLoader($container, $locator, $env),
            new YamlFileLoader($container, $locator, $env),
            new IniFileLoader($container, $locator, $env),
            new PhpFileLoader($container, $locator, $env, new ConfigBuilderGenerator($buildDir)),
            new GlobFileLoader($container, $locator, $env),
            new DirectoryLoader($container, $locator, $env),
            new ClosureLoader($container, $env),
        ]);

        return new DelegatingLoader($resolver);
    }
}

    protected function getContainerLoader(ContainerInterface $container): DelegatingLoader
    {
        $env = $this->getEnvironment();
        $locator = new FileLocator($this);
        $resolver = new LoaderResolver([
            new XmlFileLoader($container, $locator, $env),
            new YamlFileLoader($container, $locator, $env),
            new IniFileLoader($container, $locator, $env),
            new PhpFileLoader($container, $locator, $env, class_exists(ConfigBuilderGenerator::class) ? new ConfigBuilderGenerator($this->getBuildDir()) : null),
            new GlobFileLoader($container, $locator, $env),
            new DirectoryLoader($container, $locator, $env),
            new ClosureLoader($container, $env),
        ]);

        return new DelegatingLoader($resolver);
    }

    private function preBoot(): ContainerInterface
    {
        if ($this->debug) {
            $this->startTime = microtime(true);
        }

private DirectoryLoader $loader;

    public static function setUpBeforeClass(): void
    {
        self::$fixturesPath = realpath(__DIR__.'/../Fixtures/');
    }

    protected function setUp(): void
    {
        $locator = new FileLocator(self::$fixturesPath);
        $this->container = new ContainerBuilder();
        $this->loader = new DirectoryLoader($this->container, $locator);
        $resolver = new LoaderResolver([
            new PhpFileLoader($this->container, $locator),
            new IniFileLoader($this->container, $locator),
            new YamlFileLoader($this->container, $locator),
            $this->loader,
        ]);
        $this->loader->setResolver($resolver);
    }

    public function testDirectoryCanBeLoadedRecursively()
    {