<?php declare(strict_types=1);
/*
 * This file is part of sebastian/comparator.
 *
 * (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 SebastianBergmann\Comparator;

use function is_bool;
use function is_object;
use function is_scalar;
use function is_string;
use function mb_strtolower;
use function method_exists;
use function sprintf;
use SebastianBergmann\Exporter\Exporter;

/**
 * Compares scalar or NULL values for equality.
 */
class ScalarComparator extends Comparator
{
    public function accepts(mixed $expected, mixed $actual): bool
    {
        return ((is_scalar($expected) xor null === $expected) &&
               (is_scalar($actual) xor null === $actual)) ||
               // allow comparison between strings and objects featuring __toString()
               (is_string($expected) && is_object($actual) && method_exists($actual, '__toString')) ||
               (is_object($expected) && method_exists($expected, '__toString') && is_string($actual));
    }

    /**
     * @throws ComparisonFailure
     */
    public function assertEquals(mixed $expected, mixed $actual, float $delta = 0.0, bool $canonicalize = false, bool $ignoreCase = false): void
    {
        $expectedToCompare = $expected;
        $actualToCompare   = $actual;
        $exporter          = new Exporter;

        // always compare as strings to avoid strange behaviour
        // otherwise 0 == 'Foobar'
        if ((is_string($expected) && !is_bool($actual)) || (is_string($actual) && !is_bool($expected))) {
            /** @phpstan-ignore cast.string */
            $expectedToCompare = (string) $expectedToCompare;

            /** @phpstan-ignore cast.string */
            $actualToCompare = (string) $actualToCompare;

            if ($ignoreCase) {
                $expectedToCompare = mb_strtolower($expectedToCompare, 'UTF-8');
                $actualToCompare   = mb_strtolower($actualToCompare, 'UTF-8');
            }
        }

        if ($expectedToCompare !== $actualToCompare && is_string($expected) && is_string($actual)) {
            throw new ComparisonFailure(
                $expected,
                $actual,
                $exporter->export($expected),
                $exporter->export($actual),
                'Failed asserting that two strings are equal.',
            );
        }

        if ($expectedToCompare != $actualToCompare) {
            throw new ComparisonFailure(
                $expected,
                $actual,
                // no diff is required
                '',
                '',
                sprintf(
                    'Failed asserting that %s matches expected %s.',
                    $exporter->export($actual),
                    $exporter->export($expected),
                ),
            );
        }
    }
}

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