package wechatpay

import (
	"crypto/md5"
	"encoding/hex"
	"strings"
	"testing"
)

func TestSignMD5(t *testing.T) {
	got := SignMD5(map[string]string{"appid": "wx123", "mch_id": "foo", "sign": "x"}, "k")
	sum := md5.Sum([]byte("appid=wx123&mch_id=foo&key=k"))
	want := strings.ToUpper(hex.EncodeToString(sum[:]))
	if got != want {
		t.Fatalf("got %s want %s", got, want)
	}
}