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package main
import (
"bufio"
"context"
"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
type DockerCLIAttachSuite struct {
ds *DockerSuite
}
func (s *DockerCLIAttachSuite) TearDownTest(ctx context.Context, c *testing.T) {
s.ds.TearDownTest(ctx, c)
}
func (s *DockerCLIAttachSuite) OnTimeout(c *testing.T) {
s.ds.OnTimeout(c)
}
func (s *DockerCLIAttachSuite) 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(startDone)
}()
for i := 0; i < 3; i++ {
go func() {
cmd := exec.Command(dockerBinary, "attach", "attacher")
defer func() {
cmd.Wait()
endGroup.Done()
}()
out, err := cmd.StdoutPipe()
if err != nil {
c.Error(err)
}
defer out.Close()
if err := cmd.Start(); err != nil {
c.Error(err)
}
buf := make([]byte, 1024)
if _, err := out.Read(buf); err != nil && err != io.EOF {
c.Error(err)
}
startGroup.Done()
if !strings.Contains(string(buf), "hello") {
c.Errorf("unexpected output %s expected hello\n", string(buf))
}
}()
}
select {
case <-startDone:
case <-time.After(attachWait):
c.Fatalf("Attaches did not initialize properly")
}
cli.DockerCmd(c, "kill", "attacher")
select {
case <-endDone:
case <-time.After(attachWait):
c.Fatalf("Attaches did not finish properly")
}
}
func (s *DockerCLIAttachSuite) TestAttachTTYWithoutStdin(c *testing.T) {
// TODO: Figure out how to get this running again reliable on Windows.
// It works by accident at the moment. Sometimes. I've gone back to v1.13.0 and see the same.
// On Windows, docker run -d -ti busybox causes the container to exit immediately.
// Obviously a year back when I updated the test, that was not the case. However,
// with this, and the test racing with the tear-down which panic's, sometimes CI
// will just fail and `MISS` all the other tests. For now, disabling it. Will
// open an issue to track re-enabling this and root-causing the problem.
testRequires(c, DaemonIsLinux)
out := cli.DockerCmd(c, "run", "-d", "-ti", "busybox").Stdout()
id := strings.TrimSpace(out)
cli.WaitRun(c, id)
done := make(chan error, 1)
go func() {
defer close(done)
cmd := exec.Command(dockerBinary, "attach", id)
if _, err := cmd.StdinPipe(); err != nil {
done <- err
return
}
expected := "the input device is not a TTY"
if runtime.GOOS == "windows" {
expected += ". If you are using mintty, try prefixing the command with 'winpty'"
}
result := icmd.RunCmd(icmd.Cmd{
Command: cmd.Args,
Env: cmd.Env,
Dir: cmd.Dir,
Stdin: cmd.Stdin,
Stdout: cmd.Stdout,
})
if result.Error == nil {
done <- fmt.Errorf("attach should have failed")
return
} else if !strings.Contains(result.Combined(), expected) {
done <- fmt.Errorf("attach failed with error %q: expected %q", out, expected)
return
}
}()
select {
case err := <-done:
assert.NilError(c, err)
case <-time.After(attachWait):
c.Fatal("attach is running but should have failed")
}
}
func (s *DockerCLIAttachSuite) TestAttachDisconnect(c *testing.T) {
testRequires(c, DaemonIsLinux)
out := cli.DockerCmd(c, "run", "-di", "busybox", "/bin/cat").Stdout()
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")
}
func (s *DockerCLIAttachSuite) TestAttachPausedContainer(c *testing.T) {
testRequires(c, IsPausable)
runSleepingContainer(c, "-d", "--name=test")
cli.DockerCmd(c, "pause", "test")
result := cli.Docker(cli.Args("attach", "test"))
result.Assert(c, icmd.Expected{
Error: "exit status 1",
ExitCode: 1,
Err: "You cannot attach to a paused container, unpause it first",
})
}
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