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: pfs_test.go
    path of file: ./repos/k9s/internal/port
    
    the code of the file until where you have to start completion: // SPDX-License-Identifier: Apache-2.0
// Copyright Authors of K9s

package port_test

import (
	"errors"
	"testing"

	"github.com/derailed/k9s/internal/port"
	"github.com/stretchr/testify/assert"
	"k8s.io/apimachinery/pkg/util/intstr"
)

func TestParsePFs(t *testing.T) {
	uu := map[string]struct {
		spec string
		pfs  port.PFAnns
		e    error
	}{
		"single": {
			spec: "c2::4321:1234",
			pfs: port.PFAnns{
				{Container: "c2", ContainerPort: ints
    
func TestToTunnels(t *testing.T) {
	uu := map[string]struct {
		specs, ports string
		tunnels      port.PortTunnels
		err          error
	}{
		"single": {
			specs: "c2::4321:p2/1234",
			ports: "4321",
			tunnels: port.PortTunnels{
				{
					Address:       "blee",
					LocalPort:     "4321",
					Container:     "c2",
					ContainerPort: "1234",
				},
			},
		},
		"multi": {
			specs: "c1::5432:2345/2345,c2::4321:p2/1234",
			ports: "5432,4321",
			tunnels: port.PortTunnels{
				{
					Address:       "blee",
					LocalPort:     "5432",
					Container:     "c1",
					ContainerPort: "2345",
				},
				{
					Address:       "blee",
					LocalPort:     "4321",
					Container:     "c2",
					ContainerPort: "1234",
				},
			},
		},
	}

	for k := range uu {
		u := uu[k]
		t.Run(k, func(t *testing.T) {
			tt, err := port.ToTunnels("blee", u.specs, u.ports)
			assert.Equal(t, u.err, err)
			if err != nil {
				return
			}
			assert.Equal(t, u.tunnels, tt)
		})
	}
}