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<?php
/*
* 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 PHPUnit\Framework\Exception;
class Json
{
/**
* Prettify json string
*
* @param string $json
*
* @return string
*
* @throws \PHPUnit\Framework\Exception
*/
public static function prettify(string $json)
{
$decodedJson = \json_decode($json, true);
if (\json_last_error()) {
throw new Exception(
'Cannot prettify invalid json'
);
}
return \json_encode($decodedJson, JSON_PRETTY_PRINT);
}
/*
* To allow comparison of JSON strings, first process them into a consistent
* format so that they can be compared as strings.
* @return array ($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)
{
$decodedJson = \json_decode($json, true);
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)
{
if (false === \is_array($json)) {
return;
}
\ksort($json);
foreach ($json as $key => &$value) {
self::recursiveSort($value);
}
}
}
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