Omnipay\WechatPay\GatewayTest::testRefund PHP Метод

    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());
    }