ComparisonFailureBuilder.php

<?php

declare (strict_types=1);

/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\Event\Code;

use function is_bool;
use function is_scalar;
use function print_r;
use PHPUnit\Framework\ExpectationFailedException;
use Throwable;

/**
 * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
 *
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class ComparisonFailureBuilder {
    public static function from(Throwable $t) : ?ComparisonFailure {
        if (!$t instanceof ExpectationFailedException) {
            return null;
        }
        if (!$t->getComparisonFailure()) {
            return null;
        }
        $expectedAsString = $t->getComparisonFailure()
            ->getExpectedAsString();
        if (empty($expectedAsString)) {
            $expectedAsString = self::mapScalarValueToString($t->getComparisonFailure()
                ->getExpected());
        }
        $actualAsString = $t->getComparisonFailure()
            ->getActualAsString();
        if (empty($actualAsString)) {
            $actualAsString = self::mapScalarValueToString($t->getComparisonFailure()
                ->getActual());
        }
        return new ComparisonFailure($expectedAsString, $actualAsString, $t->getComparisonFailure()
            ->getDiff());
    }
    private static function mapScalarValueToString(mixed $value) : string {
        if ($value === null) {
            return 'null';
        }
        if (is_bool($value)) {
            return $value ? 'true' : 'false';
        }
        if (is_scalar($value)) {
            return print_r($value, true);
        }
        return '';
    }

}