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

package view

import (
	"testing"

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

func TestEnvReplace(t *testing.T) {
	uu := map[string]struct {
		arg string
		err error
		e   string
	}{
		"no-args":   {arg: "blee blah", e: "blee blah"},
		"simple":    {arg: "$A", e: "10"},
		"substring": {arg: "$A and $AA", e: "10 and 20"},
		"with-text": {arg: "Something $A", e: "Something 10"},
		"noMatch":   {arg: "blah blah and $BLEE", e: "blah blah and $BLEE"},
		"lower":     {arg: "And then $b happened", e: "And then blee happened"},
		"dash":      {arg: "$col0", e: "fred"},
		"underline": {arg: "$RESOURCE_GROUP", e: "foo"},
		"mix":       {arg: "$col0 and then $a but $B", e: "fred and then 10 but blee"},
		"subs":      {arg: `{"spec" : {"suspend" : $COL0 }}`, e: `{"spec" : {"suspend" : fred }}`},
		"boolean":   {arg: "$COL-BOOL", e: "false"},
		"invert":    {arg: "$!COL-BOOL", e: "true"},

		"simple_braces":    {arg: "${A}", e: "10"},
		"embed_braces":     {arg: "blabla${A}blabla", e: "blabla10blabla"},
		"open_braces":      {arg: "${A", e: "${A"},
		"closed_braces":    {arg: "$A}", e: "10}"},
		"substring_braces": {arg: "${A} and ${AA}", e: "10 and 20"},
		"with-text_braces": {arg: "Something ${A}", e: "Something 10"},
		"noMatch_braces":   {arg: "blah blah and ${BLEE}", e: "blah blah and ${BLEE}"},
		"lower_braces":     {arg: "And then ${b} happened", e: "And then blee happened"},
		"dash_braces":      {arg: "${col0}", e: "fred"},
		"underlin
    
func TestEnvReplace(t *testing.T) {
	uu := map[string]struct {
		arg string
		err error
		e   string
	}{
		"no-args":   {arg: "blee blah", e: "blee blah"},
		"simple":    {arg: "$A", e: "10"},
		"substring": {arg: "$A and $AA", e: "10 and 20"},
		"with-text": {arg: "Something $A", e: "Something 10"},
		"noMatch":   {arg: "blah blah and $BLEE", e: "blah blah and $BLEE"},
		"lower":     {arg: "And then $b happened", e: "And then blee happened"},
		"dash":      {arg: "$col0", e: "fred"},
		"underline": {arg: "$RESOURCE_GROUP", e: "foo"},
		"mix":       {arg: "$col0 and then $a but $B", e: "fred and then 10 but blee"},
		"subs":      {arg: `{"spec" : {"suspend" : $COL0 }}`, e: `{"spec" : {"suspend" : fred }}`},
		"boolean":   {arg: "$COL-BOOL", e: "false"},
		"invert":    {arg: "$!COL-BOOL", e: "true"},

		"simple_braces":    {arg: "${A}", e: "10"},
		"embed_braces":     {arg: "blabla${A}blabla", e: "blabla10blabla"},
		"open_braces":      {arg: "${A", e: "${A"},
		"closed_braces":    {arg: "$A}", e: "10}"},
		"substring_braces": {arg: "${A} and ${AA}", e: "10 and 20"},
		"with-text_braces": {arg: "Something ${A}", e: "Something 10"},
		"noMatch_braces":   {arg: "blah blah and ${BLEE}", e: "blah blah and ${BLEE}"},
		"lower_braces":     {arg: "And then ${b} happened", e: "And then blee happened"},
		"dash_braces":      {arg: "${col0}", e: "fred"},
		"underline_braces": {arg: "${RESOURCE_GROUP}", e: "foo"},
		"mix_braces":       {arg: "${col0} and then ${a} but ${B}", e: "fred and then 10 but blee"},
		"subs_braces":      {arg: `{"spec" : {"suspend" : ${COL0} }}`, e: `{"spec" : {"suspend" : fred }}`},
		"boolean_braces":   {arg: "${COL-BOOL}", e: "false"},
		"invert_braces":    {arg: "${!COL-BOOL}", e: "true"},
		"special_braces":   {arg: "${COL-%CPU/L}/${COL-MEM/R:L}", e: "10/32:32"},
		"space_braces":     {arg: "${READINESS GATES}", e: "bar"},
	}

	e := Env{
		"A":               "10",
		"AA":              "20",
		"B":               "blee",
		"COL0":            "fred",
		"FRED":            "fred",
		"COL-NAME":        "zorg",
		"COL-BOOL":        "false",
		"COL-%CPU/L":      "10",
		"COL-MEM/R:L":     "32:32",
		"RESOURCE_GROUP":  "foo",
		"READINESS GATES": "bar",
	}

	for k := range uu {
		u := uu[k]
		t.Run(k, func(t *testing.T) {
			a, err := e.Substitute(u.arg)
			assert.Equal(t, u.err, err)
			assert.Equal(t, u.e, a)
		})
	}
}