<?php
/**
- * @copyright Copyright (C) 2020, Friendica
+ * @copyright Copyright (C) 2010-2021, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
/**
* Tests if the string is a valid hexadecimal value
*
- * @param string $input
- * @param bool $valid
+ * @param string|null $input
+ * @param bool $valid
*
* @dataProvider dataIsHex
*/
- public function testIsHex(string $input, bool $valid)
+ public function testIsHex(string $input = null, bool $valid = false)
{
self::assertEquals($valid, Strings::isHex($input));
}