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<?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\Util;
use const JSON_PRETTY_PRINT;
use const JSON_UNESCAPED_SLASHES;
use const JSON_UNESCAPED_UNICODE;
use function count;
use function is_array;
use function is_object;
use function json_decode;
use function json_encode;
use function json_last_error;
use function ksort;
use PHPUnit\Framework\Exception;
/**
* @internal This class is not covered by the backward compatibility promise for PHPUnit
*/
final class Json
{
/**
* Prettify json string.
*
* @throws \PHPUnit\Framework\Exception
*/
public static function prettify(string $json): string
{
$decodedJson = json_decode($json, false);
if (json_last_error()) {
throw new Exception(
'Cannot prettify invalid json'
);
}
return json_encode($decodedJson, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
}
/**
* To allow comparison of JSON strings, first process them into a consistent
* format so that they can be compared as strings.
*
* @return array ($error, $canonicalized_json) The $error parameter is used
* to indicate an error decoding the json. This is used to avoid ambiguity
* with JSON strings consisting entirely of 'null' or 'false'.
*/
public static function canonicalize(string $json): array
{
$decodedJson = json_decode($json);
if (json_last_error()) {
return [true, null];
}
self::recursiveSort($decodedJson);
$reencodedJson = json_encode($decodedJson);
return [false, $reencodedJson];
}
/**
* JSON object keys are unordered while PHP array keys are ordered.
*
* Sort all array keys to ensure both the expected and actual values have
* their keys in the same order.
*/
private static function recursiveSort(&$json): void
{
if (!is_array($json)) {
// If the object is not empty, change it to an associative array
// so we can sort the keys (and we will still re-encode it
// correctly, since PHP encodes associative arrays as JSON objects.)
// But EMPTY objects MUST remain empty objects. (Otherwise we will
// re-encode it as a JSON array rather than a JSON object.)
// See #2919.
if (is_object($json) && count((array) $json) > 0) {
$json = (array) $json;
} else {
return;
}
}
ksort($json);
foreach ($json as $key => &$value) {
self::recursiveSort($value);
}
}
}
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