vendor/symfony/phpunit-bridge/DeprecationErrorHandler.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Bridge\PhpUnit;

/**
 * Catch deprecation notices and print a summary report at the end of the test suite.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 */
class DeprecationErrorHandler
{
    const MODE_WEAK = 'weak';
    const MODE_DISABLED = 'disabled';

    private static $isRegistered = false;

    /**
     * Registers and configures the deprecation handler.
     *
     * The following reporting modes are supported:
     * - use "weak" to hide the deprecation report but keep a global count;
     * - use "/some-regexp/" to stop the test suite whenever a deprecation
     *   message matches the given regular expression;
     * - use a number to define the upper bound of allowed deprecations,
     *   making the test suite fail whenever more notices are trigerred.
     *
     * @param int|string|false $mode The reporting mode, defaults to not allowing any deprecations
     */
    public static function register($mode = 0)
    {
        if (self::$isRegistered) {
            return;
        }

        $getMode = function () use ($mode) {
            static $memoizedMode = false;

            if (false !== $memoizedMode) {
                return $memoizedMode;
            }
            if (false === $mode) {
                $mode = getenv('SYMFONY_DEPRECATIONS_HELPER');
            }
            if (DeprecationErrorHandler::MODE_WEAK !== $mode && (!isset($mode[0]) || '/' !== $mode[0])) {
                $mode = preg_match('/^[1-9][0-9]*$/', $mode) ? (int) $mode : 0;
            }

            return $memoizedMode = $mode;
        };

        $deprecations = array(