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: transformer_test.go
    path of file: ./repos/magistrala/pkg/transformers/senml
    
    the code of the file until where you have to start completion: // Copyright (c) Abstract Machines
// SPDX-License-Identifier: Apache-2.0

package senml_test

import (
	"encoding/hex"
	"fmt"
	"testing"

	"github.com/absmach/magistrala/pkg/errors"
	"github.com/absmach/magistrala/pkg/messaging"
	"github.com/absmach/magistrala/pkg/transformers/senml"
	mgsenml "github.com/absmach/senml"
	"github.com/stretchr/testify/assert"
)

func TestTransformJSON(t *testing.T) {
	// Following hex-encoded bytes correspond to the content of:
	// [{-2: "base-name", -3: 100.0, -4: "base-unit", -1: 10, -5: 10.0, -6: 100.0, 0: "name", 1: "unit", 6: 300.0, 7: 150.0, 2: 42.0, 5: 10.0}]
	// For more details for mapping SenML labels to integers, please take a look here: https://tools.ietf.org/html/rfc8428#page-19.
	jsonBytes, err := hex.DecodeString("5b7b22626e223a22626173652d6e616d65222c226274223a3130302c226275223a22626173652d756e6974222c2262766572223a31302c226276223a31302c226273223a3130302c226e223a226e616d65222c2275223a22756e6974222c2274223a3330302c227574223a3135302c2276223a34322c2273223a31307d5d")
	assert.Nil(t, err, "Decoding JSON expected to succeed")

	tr := senml.New(senml.JSON)
	msg := &messaging.Message{
		Channel:   "channel",
		Subtopic:  "subtopic",
		Publisher: "publisher",
		Protocol:  "protocol",
		Payload:   jsonBytes,
	}

	jsonPld := msg
	jsonPld.Payload = jsonBytes

	val := 52.0
	sum := 110.0
	msgs := []senml.Message{
		{
			Channel:    "channel",
			Subtopic:   "subtopic",
			Publisher:  "publisher",
			Protocol:   "protocol",
			Name:       "base-namename",
			Unit:       "unit",
			Time:       400,
			UpdateTime: 150,
			Value:      &val,
			Sum:        &su
    
func TestTransformCBOR(t *testing.T) {
	// Following hex-encoded bytes correspond to the content of:
	// [{-2: "base-name", -3: 100.0, -4: "base-unit", -1: 10, -5: 10.0, -6: 100.0, 0: "name", 1: "unit", 6: 300.0, 7: 150.0, 2: 42.0, 5: 10.0}]
	// For more details for mapping SenML labels to integers, please take a look here: https://tools.ietf.org/html/rfc8428#page-19.
	cborBytes, err := hex.DecodeString("81ac2169626173652d6e616d6522fb40590000000000002369626173652d756e6974200a24fb402400000000000025fb405900000000000000646e616d650164756e697406fb4072c0000000000007fb4062c0000000000002fb404500000000000005fb4024000000000000")
	assert.Nil(t, err, "Decoding CBOR expected to succeed")

	tooManyBytes, err := hex.DecodeString("82AD2169626173652D6E616D6522F956402369626173652D756E6974200A24F9490025F9564000646E616D650164756E697406F95CB0036331323307F958B002F9514005F94900AA2169626173652D6E616D6522F956402369626173652D756E6974200A24F9490025F9564000646E616D6506F95CB007F958B005F94900")
	assert.Nil(t, err, "Decoding CBOR expected to succeed")

	tr := senml.New(senml.CBOR)

	cborPld := &messaging.Message{
		Channel:   "channel",
		Subtopic:  "subtopic",
		Publisher: "publisher",
		Protocol:  "protocol",
		Payload:   cborBytes,
	}

	tooManyMsg := &messaging.Message{
		Channel:   "channel",
		Subtopic:  "subtopic",
		Publisher: "publisher",
		Protocol:  "protocol",
		Payload:   tooManyBytes,
	}

	val := 52.0
	sum := 110.0
	msgs := []senml.Message{
		{
			Channel:    "channel",
			Subtopic:   "subtopic",
			Publisher:  "publisher",
			Protocol:   "protocol",
			Name:       "base-namename",
			Unit:       "unit",
			Time:       400,
			UpdateTime: 150,
			Value:      &val,
			Sum:        &sum,
		},
	}

	cases := []struct {
		desc string
		msg  *messaging.Message
		msgs interface{}
		err  error
	}{
		{
			desc: "test normalize CBOR",
			msg:  cborPld,
			msgs: msgs,
			err:  nil,
		},
		{
			desc: "test invalid payload",
			msg:  tooManyMsg,
			msgs: nil,
			err:  mgsenml.ErrTooManyValues,
		},
	}

	for _, tc := range cases {
		msgs, err := tr.Transform(tc.msg)
		assert.Equal(t, tc.msgs, msgs, fmt.Sprintf("%s expected %v, got %v", tc.desc, tc.msgs, msgs))
		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s expected %s, got %s", tc.desc, tc.err, err))
	}
}