public function testRefund()
{
$options = array('transaction_id' => '1234567891023', 'out_refund_no' => '1234567891023', 'total_fee' => '100', 'refund_fee' => '100');
/**
* @var RefundOrderResponse $response
*/
$response = $this->gateway->query($options)->send();
$this->assertFalse($response->isSuccessful());
}