Codeception class to test

class Status {
    public const CODES = [
        ......
    ];

    protected $code;

    public function __construct(string $code) {
        if (!$this->codeIsKnown($code)){
            throw new Exception\UnknownStatusCodeException('Unknown code: '.$code);
        }
        $this->code = $code;
    }

    protected function codeIsKnown(string $code):bool{
        return in_array($code, self::CODES);
    }
}