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: xml_msg_serializer_test.go
    path of file: ./repos/goRailsYourself/crypto
    
    the code of the file until where you have to start completion: package crypto

import (
	. "github.com/franela/goblin"
	"testing"
)

func TestXmlSerializerSerializer(t *testing.T) {
	g := Goblin(t)
	serializer := XMLMsgSerializer{}

	g.Describe("a xml serialized string", func() {
		data := "this is a test"
		output, err := serializer.Serialize(data)
		g.Assert(err).Eql(err)

		g.It("can be deserialized", func() {
			var o string
			err := serializer.Unserialize(output, &o)
			g.Assert(err).Eql(nil)
			g.Assert(o).Eql(data)
		})
	})

	g.Describe("a xml serialized struct", func() {
		type Person struct {
			Id        int    `xml:"id,attr"`
			FirstName string `xml:"name>first"`
			LastName  string `xml:"name>last"`
			Age       int    `xml:"age"`
		}

    
func TestXmlSerializerSerializer(t *testing.T) {
	g := Goblin(t)
	serializer := XMLMsgSerializer{}

	g.Describe("a xml serialized string", func() {
		data := "this is a test"
		output, err := serializer.Serialize(data)
		g.Assert(err).Eql(err)

		g.It("can be deserialized", func() {
			var o string
			err := serializer.Unserialize(output, &o)
			g.Assert(err).Eql(nil)
			g.Assert(o).Eql(data)
		})
	})

	g.Describe("a xml serialized struct", func() {
		type Person struct {
			Id        int    `xml:"id,attr"`
			FirstName string `xml:"name>first"`
			LastName  string `xml:"name>last"`
			Age       int    `xml:"age"`
		}
		data := Person{Id: 13, FirstName: "John", LastName: "Doe", Age: 42}
		output, err := serializer.Serialize(data)
		g.Assert(err).Eql(err)

		g.It("can be deserialized", func() {
			var o Person
			err := serializer.Unserialize(output, &o)
			g.Assert(err).Eql(nil)
			g.Assert(o).Eql(data)
		})
	})

}