EDI\Reader::readUNHmessageNumber PHP Method

    public function readUNHmessageNumber()
    {
        return $this->readEdiDataValue('UNH', 1);
    }

 public function testReadUNHmessageNumber()
 {
     $r = new Reader(__DIR__ . "/../files/example.edi");
     $messageNumber = $r->readUNHmessageNumber();
     $this->assertEquals('1', $messageNumber);
 }