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TestSigProxyWithTTY: fix 

exec.CombinedOutput should not be used here because:
 - it redirects cmd Stdout and Stderr and we want it to be the tty
 - it calls cmd.Run which we already did

While at it
 - use pty.Start() as it is cleaner
 - make sure we don't leave a zombie running, by calling Wait() in defer
 - use test.Name() for containerName

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This commit is contained in:
Kir Kolyshkin 2019-07-23 17:12:16 -07:00
parent 68c2c10926
commit bc4ed69a23
1 changed files with 10 additions and 16 deletions
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26
e2e/container/proxy_signal_test.go
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@ -17,29 +17,23 @@ import (
// TestSigProxyWithTTY tests that killing the docker CLI forwards the signal to
// the container, and kills the container's process. Test-case for moby/moby#28872
func TestSigProxyWithTTY(t *testing.T) {
_, tty, err := pty.Open()
assert.NilError(t, err, "could not open pty")
defer func() { _ = tty.Close() }()
cmd := exec.Command("docker", "run", "-i", "-t", "--init", "--name", t.Name(), fixtures.BusyboxImage, "sleep", "30")
p, err := pty.Start(cmd)
defer func() {
_ = cmd.Wait()
_ = p.Close()
}()
assert.NilError(t, err, "failed to start container")
defer icmd.RunCommand("docker", "container", "rm", "-f", t.Name())
containerName := "repro-28872"
cmd := exec.Command("docker", "run", "-i", "-t", "--init", "--name", containerName, fixtures.BusyboxImage, "sleep", "30")
cmd.Stdin = tty
cmd.Stdout = tty
cmd.Stderr = tty
err = cmd.Start()
out, _ := cmd.CombinedOutput()
assert.NilError(t, err, "failed to start container: %s", out)
defer icmd.RunCommand("docker", "container", "rm", "-f", containerName)
poll.WaitOn(t, containerExistsWithStatus(t, containerName, "running"), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(5*time.Second))
poll.WaitOn(t, containerExistsWithStatus(t, t.Name(), "running"), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(5*time.Second))
pid := cmd.Process.Pid
t.Logf("terminating PID %d", pid)
err = syscall.Kill(pid, syscall.SIGTERM)
assert.NilError(t, err)
poll.WaitOn(t, containerExistsWithStatus(t, containerName, "exited"), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(5*time.Second))
poll.WaitOn(t, containerExistsWithStatus(t, t.Name(), "exited"), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(5*time.Second))
}
func containerExistsWithStatus(t *testing.T, containerID, status string) func(poll.LogT) poll.Result {