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: gob_codec_test.go
    path of file: ./repos/flyte/flytepropeller/pkg/controller/nodes/task/codex
    
    the code of the file until where you have to start completion: package codex

import (
	"bytes"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestGobStateCodec(t *testing.T) {
	g := GobStateCodec{}

	type sample struct {
		A int
		B string
	}

	type sample2 struct {
		A int
		B string
		C int
	}

	type sample3 struct {
		B string
		C int
	}

	t.Run("symmetric", func(t *testing.T) {
		b := bytes.NewBuffer([]byte{})
		s := &sample{A: 10, B: "hello"}
		assert.NoError(t, g.Encode(&s, b))

		s2 := &sample{}
		assert.NoError(t, g.Decode(b, s2))
		assert.Equal(t, s2.A, s.A)
		assert.Equal(t, s2.B, s.B)
	})

	t.Run("updated", func(t *testing.T) {
		b := bytes.NewBuffer([]byte{})
		s := &sample{A: 10, B: "hello"}
		assert.NoError(t, g.Encode(&s, b))

		s2 := &sample2{}
		assert.NoError(t, g.Decode(b, s2))
		assert.Equal(t, s2.A, s.A)
		assert.Equal(t, s2.B, s.B)
		assert.Equal(t, s2.C, 0)
	})

	t.Run("bad-update", func(t *testing.T) {
		b := bytes.NewBuf
    
func TestGobStateCodec(t *testing.T) {
	g := GobStateCodec{}

	type sample struct {
		A int
		B string
	}

	type sample2 struct {
		A int
		B string
		C int
	}

	type sample3 struct {
		B string
		C int
	}

	t.Run("symmetric", func(t *testing.T) {
		b := bytes.NewBuffer([]byte{})
		s := &sample{A: 10, B: "hello"}
		assert.NoError(t, g.Encode(&s, b))

		s2 := &sample{}
		assert.NoError(t, g.Decode(b, s2))
		assert.Equal(t, s2.A, s.A)
		assert.Equal(t, s2.B, s.B)
	})

	t.Run("updated", func(t *testing.T) {
		b := bytes.NewBuffer([]byte{})
		s := &sample{A: 10, B: "hello"}
		assert.NoError(t, g.Encode(&s, b))

		s2 := &sample2{}
		assert.NoError(t, g.Decode(b, s2))
		assert.Equal(t, s2.A, s.A)
		assert.Equal(t, s2.B, s.B)
		assert.Equal(t, s2.C, 0)
	})

	t.Run("bad-update", func(t *testing.T) {
		b := bytes.NewBuffer([]byte{})
		s := &sample{A: 10, B: "hello"}
		assert.NoError(t, g.Encode(&s, b))

		s3 := &sample3{}
		assert.NoError(t, g.Decode(b, s3))
		assert.Equal(t, s3.B, s.B)
		assert.Equal(t, s3.C, 0)
	})
}