Omnipay\Alipay\Tests\LegacyExpressGatewayTest::testRefund PHP Метод

    public function testRefund()
    {
        /**
         * @var LegacyRefundResponse $response
         */
        $response = $this->gateway->refund(['refund_items' => [['out_trade_no' => '2016092021001003280286716852', 'amount' => '1', 'reason' => 'test']]])->send();
        $this->assertTrue($response->isSuccessful());
        $this->assertTrue($response->isRedirect());
        $this->assertNotEmpty($response->getRedirectUrl());
    }