assertarraysubset-autoload.php

<?php

namespace DMS\PHPUnitExtensions\ArraySubset;

use PHPUnit\Runner\Version as PHPUnit_Version;
use PHPUnit_Runner_Version;

if (\class_exists('DMS\PHPUnitExtensions\ArraySubset\Autoload', false) === false) {

    /**
     * Custom autoloader.
     *
     * {@internal The code in this file must be PHP cross-version compatible for PHP 5.4 - current!}
     */
    class Autoload
    {
        /**
         * Loads a class.
         *
         * @param string $className The name of the class to load.
         *
         * @return bool
         */
        public static function load($className)
        {
            // Only load classes belonging to this library.
            if (\stripos($className, 'DMS\PHPUnitExtensions\ArraySubset') !== 0) {
                return false;
            }

            $loadPolyfill = \version_compare(self::getPHPUnitVersion(), '8.0.0', '>=');

            switch ($className) {
                case 'DMS\PHPUnitExtensions\ArraySubset\ArraySubsetAsserts':
                    if ($loadPolyfill === true) {
                        // PHPUnit >= 8.0.0.
                        require_once __DIR__ . '/src/ArraySubsetAsserts.php';

                        return true;
                    }

                    // PHPUnit < 8.0.0.
                    require_once __DIR__ . '/src/ArraySubsetAssertsEmpty.php';

                    return true;

                case 'DMS\PHPUnitExtensions\ArraySubset\Assert':
                    if ($loadPolyfill === true) {
                        // PHPUnit >= 8.0.0.
                        require_once __DIR__ . '/src/Assert.php';

                        return true;
                    }

                    // PHPUnit < 8.0.0.
                    require_once __DIR__ . '/src/AssertFallThrough.php';

                    return true;

                /*
                 * Handle arbitrary additional classes via PSR-4, but only allow loading on PHPUnit >= 8.0.0,
                 * as additional classes should only ever _need_ to be loaded when using PHPUnit >= 8.0.0.
                 */
                default:
                    if ($loadPolyfill === false) {
                        // PHPUnit < 9.0.0.
                        throw new \RuntimeException(
                            \sprintf(
                                'Using class "%s" is only supported in combination with PHPUnit >= 8.0.0',
                                $className
                            )
                        );
                    }

                    // PHPUnit >= 8.0.0.
                    $file = \realpath(
                        __DIR__ . \DIRECTORY_SEPARATOR
                        . 'src' . \DIRECTORY_SEPARATOR
                        . \strtr(\substr($className, 33), '\\', \DIRECTORY_SEPARATOR) . '.php'
                    );

                    if (\file_exists($file) === true) {
                        require_once $file;

                        return true;
                    }
            }

            return false;
        }

        /**
         * Retrieve the PHPUnit version id.
         *
         * As both the pre-PHPUnit 6 class, as well as the PHPUnit 6+ class contain the `id()` function,
         * this should work independently of whether or not another library may have aliased the class.
         *
         * @return string Version number as a string.
         */
        public static function getPHPUnitVersion()
        {
            if (\class_exists('\PHPUnit\Runner\Version')) {
                return PHPUnit_Version::id();
            }

            if (\class_exists('\PHPUnit_Runner_Version')) {
                return PHPUnit_Runner_Version::id();
            }

            return '0';
        }
    }

    \spl_autoload_register(__NAMESPACE__ . '\Autoload::load');
}