You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: sign_test.go
    path of file: ./repos/gopay/alipay
    
    the code of the file until where you have to start completion: package alipay

import (
	"os"
	"testing"

	"github.com/go-pay/crypto/xrsa"
	"github.com/go-pay/gopay"
	"github.com/go-pay/xlog"
)

func TestSyncVerifySign(t *testing.T) {
	signData := `{"code":"10000","msg":"Success","buyer_logon_id":"854***@qq.com","buyer_pay_amount":"0.01","buyer_user_id":"2088102363632794","fund_bill_list":[{"amount":"0.01","fund_channel":"PCREDIT"}],"gmt_payment":"2019-08-29 20:14:05","invoice_amount":"0.01","out_trade_no":"GZ201901301040361012","point_amount":"0.00","receipt_amount":"0.01","total_amount":"0.01","trade_no":"2019082922001432790585537960"}`
	sign := "bk3SzX0CZRI811IJioS2XKQHcgMixUT8mYyGQj+vcOAQas7GIYi6LpykqqSc3m7+yvqoG0TdX/c2JjYnpw/J53JxtC2IC4vsLuIPIgghVo5qafsfSxEJ22w20RZDatI2dYqFVcj8Jp+4aesQ8zMMNw7cX9NLyk7kw3DecYeyQp+zrZMueZPqLh88Z+54G+e6QuSU++0ouqQVd4PkpPqy6YI+8MdMUX4Ve0jOQxMmYH8BC6n5ZsTH/uEaLEtzYVZdSw/xdSQ7K1SH73aEH8XbRYx6rL7RkKksrdvhezX+ThDjQ+fTWjvNFrGcg3fmqXRy2elvoalu+BQmqlkWWjEJYA=="
	alipayPublicKey := "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp8gueNlkbiDidz6FBQEBpqoRgH8h7JtsPtYW0nzAqy1MME4mFnDSMfSKlreUomS3a55gmBopL1eF4/Km/dEnaL5tCY9+24SKn1D4iyls+lvz/ZjvUjVwxoUYBh8kkcxMZSDeDz8//o+9qZTrICVP2a4sBB8T0XmU4gxfw8FsmtoomBH1nLk3AO7wgRN2a3+SRSAmxrhIGDmF1lljSlhY32eJpJ2TZQ
    
func TestVerifySign(t *testing.T) {
	// 测试，假数据，无法验签通过
	publicKey := "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp8gueNlkbiDidz6FBQEBpqoRgH8h7JtsPtYW0nzAqy1MME4mFnDSMfSKlreUomS3a55gmBopL1eF4/Km/dEnaL5tCY9+24SKn1D4iyls+lvz/ZjvUjVwxoUYBh8kkcxMZSDeDz8//o+9qZTrICVP2a4sBB8T0XmU4gxfw8FsmtoomBH1nLk3AO7wgRN2a3+SRSAmxrhIGDmF1lljSlhY32eJpJ2TZQKaWNW+7yDBU/0Wt3kQVY84vr14yYagnSCiIfqyVFqePayRtmVJDr5qvSXr51tdqs2zKZCu+26X7JAF4BSsaq4gmY5DmDTm4TohCnBduI1+bPGD+igVmtl05wIDAQAB"

	bm := make(gopay.BodyMap)
	bm.Set("sign", "f19WZ3rko3cVpSG3uEEJF0eb4DuZVLt4/GXnNw9qg8iHUsJLkav0V91R5SSTDhW5lgkn3Xhq7TkFRJiDXdVXMu3XUlsONArp3Iu4tXagYJWt9jbcnc2/l29VYDXPLNcs7BXEWFEaCZLutQY2U82AumEwSc1XBKtsLC4mVX3M3f/ExFQHWklJEBHArYBGe4535uFRlsT2fk6WVuX8CuYZatCrVF1o02xMS5aD29eICPkmin/h87OcTbE1syktyCU1WVgcypagUdGGPTF0SVDFf7FRov7+w7fiCGGGL10tNlK/MLzcewtN2dyGF6RLUX3m+HQ7sNEk2wylRXLNUFig==")
	bm.Set("seller_email", "imonkey@100tal.com")
	bm.Set("sign_type", RSA2)
	bm.Set("total_amount", "0.02")
	bm.Set("buyer_id", "2088812847201551")
	bm.Set("invoice_amount", "0.02")
	bm.Set("fund_bill_list", `[{"amount":"0.02","fundChannel":"PCREDIT"}]`)
	bm.Set("trade_no", "2020010222001401551430614892")
	bm.Set("receipt_amount", "0.02")
	bm.Set("buyer_pay_amount", "0.02")
	bm.Set("notify_time", "2020-01-02 16:18:21")
	bm.Set("subject", "商品")
	bm.Set("auth_app_id", "2015102700040153")
	bm.Set("charset", "utf-8")
	bm.Set("point_amount", "0.00")
	bm.Set("notify_type", "trade_status_sync")
	bm.Set("out_trade_no", "1086209247658383466")
	bm.Set("gmt_payment", "2020-01-02 16:18:21")
	bm.Set("trade_status", "TRADE_SUCCESS")
	bm.Set("version", "1.0")
	bm.Set("buyer_logon_id", "185****2920")
	bm.Set("gmt_create", "2020-01-02 16:18:21")
	bm.Set("app_id", "2015102700040153")
	bm.Set("seller_id", "2088631240818980")
	bm.Set("notify_id", "2020010200222161821001551453140885")

	ok, err := VerifySign(publicKey, bm)
	if err != nil {
		xlog.Errorf("VerifySign(%+v),error:%+v", bm, err)
		return
	}
	xlog.Debug("OK:", ok)
}