DebugClassLoader example

class DebugClassLoaderTest extends TestCase
{
    private string|false $patchTypes;
    private int $errorReporting;
    private array $loader;

    protected function setUp(): void
    {
        $this->patchTypes = getenv('SYMFONY_PATCH_TYPE_DECLARATIONS');
        $this->errorReporting = error_reporting(E_ALL);
        putenv('SYMFONY_PATCH_TYPE_DECLARATIONS=deprecations=1');
        $this->loader = [new DebugClassLoader([new ClassLoader(), 'loadClass']), 'loadClass'];
        spl_autoload_register($this->loader, true, true);
    }

    protected function tearDown(): void
    {
        spl_autoload_unregister($this->loader);
        error_reporting($this->errorReporting);
        putenv('SYMFONY_PATCH_TYPE_DECLARATIONS'.(false !== $this->patchTypes ? '='.$this->patchTypes : ''));
    }

    /** * @runInSeparateProcess */

$this->assertSame($enhancedMessage, $error->getMessage());
        $this->assertSame(realpath(__FILE__), $error->getFile());
        $this->assertSame($expectedLine, $error->getLine());
    }

    public static function provideClassNotFoundData()
    {
        $autoloader = new ComposerClassLoader();
        $autoloader->add('Symfony\Component\ErrorHandler\Error\\', realpath(__DIR__.'/../../Error'));
        $autoloader->add('Symfony_Component_ErrorHandler_Tests_Fixtures', realpath(__DIR__.'/../../Tests/Fixtures'));

        $debugClassLoader = new DebugClassLoader([$autoloader, 'loadClass']);

        return [
            [
                'Class "WhizBangFactory" not found',
                "Attempted to load class \"WhizBangFactory\" from the global namespace.\nDid you forget a \"use\" statement?",
            ],
            [
                'Class \'WhizBangFactory\' not found',
                "Attempted to load class \"WhizBangFactory\" from the global namespace.\nDid you forget a \"use\" statement?",
            ],
            [