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: helpwrap1.19_test.go
    path of file: ./repos/kong
    
    the code of the file until where you have to start completion: // Wrapping of text changed in Go1.19 per https://github.com/alecthomas/kong/issues/325
// The test has been split pre-go1.19 and go1.19 and onwards.

//go:build go1.19
// +build go1.19

package kong_test

import (
	"bytes"
	"testing"

	"github.com/alecthomas/assert/v2"
	"github.com/alecthomas/kong"
)

func TestCustomWrap(t *testing.T) {
	var cli struct {
		Flag string `help:"A string flag with very long help that wraps 
    
func TestCustomWrap(t *testing.T) {
	var cli struct {
		Flag string `help:"A string flag with very long help that wraps a lot and is verbose and is really verbose."`
	}

	w := bytes.NewBuffer(nil)
	app := mustNew(t, &cli,
		kong.Name("test-app"),
		kong.Description("A test app."),
		kong.HelpOptions{
			WrapUpperBound: 50,
		},
		kong.Writers(w, w),
		kong.Exit(func(int) {}),
	)

	_, err := app.Parse([]string{"--help"})
	assert.NoError(t, err)
	expected := `Usage: test-app [flags]

A test app.

Flags:
  -h, --help           Show context-sensitive
                       help.
      --flag=STRING    A string flag with very
                       long help that wraps a
                       lot and is verbose and is
                       really verbose.
`
	t.Log(w.String())
	t.Log(expected)
	assert.Equal(t, expected, w.String())
}