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<?php
/*
* (c) Markus Lanthaler <mail@markus-lanthaler.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ML\JsonLD\Test;
/**
* A JSON Test Case
*
* This class extends {@link \PHPUnit_Framework_TestCase} with an assertion
* to compare JSON.
*
* @author Markus Lanthaler <mail@markus-lanthaler.com>
*/
abstract class JsonTestCase extends \PHPUnit\Framework\TestCase
{
/**
* Asserts that two JSON structures are equal.
*
* @param object|array $expected
* @param object|array $actual
* @param string $message
*/
public static function assertJsonEquals($expected, $actual, $message = '')
{
$expected = self::normalizeJson($expected);
$actual = self::normalizeJson($actual);
self::assertEquals($expected, $actual, $message);
}
/**
* Brings the keys of objects to a deterministic order to enable
* comparison of JSON structures
*
* @param mixed $element The element to normalize.
*
* @return mixed The same data with all object keys ordered in a
* deterministic way.
*/
private static function normalizeJson($element)
{
if (is_array($element)) {
foreach ($element as &$item) {
$item = self::normalizeJson($item);
}
} elseif (is_object($element)) {
$element = (array) $element;
ksort($element);
$element = (object) $element;
foreach ($element as &$item) {
$item = self::normalizeJson($item);
}
}
return $element;
}
}
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