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: docker_cli_attach_test.go
    path of file: ./repos/docker-ce/components/engine/integration-cli
    
    the code of the file until where you have to start completion: package main

import (
	"bufio"
	"fmt"
	"io"
	"os/exec"
	"runtime"
	"strings"
	"sync"
	"testing"
	"time"

	"github.com/docker/docker/integration-cli/cli"
	"gotest.tools/v3/assert"
	"gotest.tools/v3/icmd"
)

const attachWait = 5 * time.Second

func (s *DockerSuite) TestAttachMultipleAndRestart(c *testing.T) {
	endGroup := &sync.WaitGroup{}
	startGroup := &sync.WaitGroup{}
	endGroup.Add(3)
	startGroup.Add(3)

	cli.DockerCmd(c, "run", "--name", "attacher", "-d", "busybox", "/bin/sh", "-c", "while true; do sleep 1; echo hello; done")
	cli.WaitRun(c, "attacher")

	startDone := make(chan struct{})
	endDone := make(chan struct{})

	go func() {
		endGroup.Wait()
		close(endDone)
	}()

	go func() {
		startGroup.Wait()
		close(s
    
func (s *DockerSuite) TestAttachDisconnect(c *testing.T) {
	testRequires(c, DaemonIsLinux)
	out, _ := dockerCmd(c, "run", "-di", "busybox", "/bin/cat")
	id := strings.TrimSpace(out)

	cmd := exec.Command(dockerBinary, "attach", id)
	stdin, err := cmd.StdinPipe()
	if err != nil {
		c.Fatal(err)
	}
	defer stdin.Close()
	stdout, err := cmd.StdoutPipe()
	assert.NilError(c, err)
	defer stdout.Close()
	assert.Assert(c, cmd.Start() == nil)
	defer func() {
		cmd.Process.Kill()
		cmd.Wait()
	}()

	_, err = stdin.Write([]byte("hello\n"))
	assert.NilError(c, err)
	out, err = bufio.NewReader(stdout).ReadString('\n')
	assert.NilError(c, err)
	assert.Equal(c, strings.TrimSpace(out), "hello")

	assert.Assert(c, stdin.Close() == nil)

	// Expect container to still be running after stdin is closed
	running := inspectField(c, id, "State.Running")
	assert.Equal(c, running, "true")
}