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<?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 array_key_exists;

use function is_array;

use function sort;

use function sprintf;

use function str_replace;

use function trim;

/**

 * Compares arrays for equality.

 *

 * Arrays are equal if they contain the same key-value pairs.

 * The order of the keys does not matter.

 * The types of key-value pairs do not matter.

 */

class ArrayComparator extends Comparator

{

    /**

     * Returns whether the comparator can compare two values.

     *

     * @param mixed $expected The first value to compare

     * @param mixed $actual   The second value to compare

     *

     * @return bool

     */

    public function accepts($expected, $actual)

    {

        return is_array($expected) && is_array($actual);

    }

    /**

     * Asserts that two arrays are equal.

     *

     * @param mixed $expected     First value to compare

     * @param mixed $actual       Second value to compare

     * @param float $delta        Allowed numerical distance between two values to consider them equal

     * @param bool  $canonicalize Arrays are sorted before comparison when set to true

     * @param bool  $ignoreCase   Case is ignored when set to true

     * @param array $processed    List of already processed elements (used to prevent infinite recursion)

     *

     * @throws ComparisonFailure

     */

    public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = false, $ignoreCase = false, array &$processed = [])/*: void*/

    {

        if ($canonicalize) {

            sort($expected);

            sort($actual);

        }

        $remaining        = $actual;

        $actualAsString   = "Array (\n";

        $expectedAsString = "Array (\n";

        $equal            = true;

        foreach ($expected as $key => $value) {

            unset($remaining[$key]);

            if (!array_key_exists($key, $actual)) {

                $expectedAsString .= sprintf(

                    "    %s => %s\n",

                    $this->exporter->export($key),

                    $this->exporter->shortenedExport($value)

                );

                $equal = false;

                continue;

            }

            try {

                $comparator = $this->factory->getComparatorFor($value, $actual[$key]);

                $comparator->assertEquals($value, $actual[$key], $delta, $canonicalize, $ignoreCase, $processed);

                $expectedAsString .= sprintf(

                    "    %s => %s\n",

                    $this->exporter->export($key),

                    $this->exporter->shortenedExport($value)

                );

                $actualAsString .= sprintf(

                    "    %s => %s\n",

                    $this->exporter->export($key),

                    $this->exporter->shortenedExport($actual[$key])

                );

            } catch (ComparisonFailure $e) {

                $expectedAsString .= sprintf(

                    "    %s => %s\n",

                    $this->exporter->export($key),

                    $e->getExpectedAsString() ? $this->indent($e->getExpectedAsString()) : $this->exporter->shortenedExport($e->getExpected())

                );

                $actualAsString .= sprintf(

                    "    %s => %s\n",

                    $this->exporter->export($key),

                    $e->getActualAsString() ? $this->indent($e->getActualAsString()) : $this->exporter->shortenedExport($e->getActual())

                );

                $equal = false;

            }

        }

        foreach ($remaining as $key => $value) {

            $actualAsString .= sprintf(

                "    %s => %s\n",

                $this->exporter->export($key),

                $this->exporter->shortenedExport($value)

            );

            $equal = false;

        }

        $expectedAsString .= ')';

        $actualAsString .= ')';

        if (!$equal) {

            throw new ComparisonFailure(

                $expected,

                $actual,

                $expectedAsString,

                $actualAsString,

                false,

                'Failed asserting that two arrays are equal.'

            );

        }

    }

    protected function indent($lines)

    {

        return trim(str_replace("\n", "\n    ", $lines));

    }

}