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moby--moby/integration-cli/docker_cli_wait_test.go

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package main
import (
"bytes"
"os/exec"
"strings"
"time"
"github.com/docker/docker/pkg/integration/checker"
"github.com/go-check/check"
)
// non-blocking wait with 0 exit code
func (s *DockerSuite) TestWaitNonBlockedExitZero(c *check.C) {
out, _ := dockerCmd(c, "run", "-d", "busybox", "sh", "-c", "true")
containerID := strings.TrimSpace(out)
err := waitInspect(containerID, "{{.State.Running}}", "false", 30*time.Second)
c.Assert(err, checker.IsNil) //Container should have stopped by now
out, _ = dockerCmd(c, "wait", containerID)
c.Assert(strings.TrimSpace(out), checker.Equals, "0", check.Commentf("failed to set up container, %v", out))
}
// blocking wait with 0 exit code
func (s *DockerSuite) TestWaitBlockedExitZero(c *check.C) {
// Windows busybox does not support trap in this way, not sleep with sub-second
// granularity. It will always exit 0x40010004.
testRequires(c, DaemonIsLinux)
out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "trap 'exit 0' TERM; while true; do usleep 10; done")
containerID := strings.TrimSpace(out)
c.Assert(waitRun(containerID), checker.IsNil)
chWait := make(chan string)
go func() {
chWait <- ""
out, _, _ := runCommandWithOutput(exec.Command(dockerBinary, "wait", containerID))
chWait <- out
}()
<-chWait // make sure the goroutine is started
time.Sleep(100 * time.Millisecond)
dockerCmd(c, "stop", containerID)
select {
case status := <-chWait:
c.Assert(strings.TrimSpace(status), checker.Equals, "0", check.Commentf("expected exit 0, got %s", status))
case <-time.After(2 * time.Second):
c.Fatal("timeout waiting for `docker wait` to exit")
}
}
// non-blocking wait with random exit code
func (s *DockerSuite) TestWaitNonBlockedExitRandom(c *check.C) {
out, _ := dockerCmd(c, "run", "-d", "busybox", "sh", "-c", "exit 99")
containerID := strings.TrimSpace(out)
err := waitInspect(containerID, "{{.State.Running}}", "false", 30*time.Second)
c.Assert(err, checker.IsNil) //Container should have stopped by now
out, _ = dockerCmd(c, "wait", containerID)
c.Assert(strings.TrimSpace(out), checker.Equals, "99", check.Commentf("failed to set up container, %v", out))
}
// blocking wait with random exit code
func (s *DockerSuite) TestWaitBlockedExitRandom(c *check.C) {
// Cannot run on Windows as trap in Windows busybox does not support trap in this way.
testRequires(c, DaemonIsLinux)
out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "trap 'exit 99' TERM; while true; do usleep 10; done")
containerID := strings.TrimSpace(out)
c.Assert(waitRun(containerID), checker.IsNil)
chWait := make(chan error)
waitCmd := exec.Command(dockerBinary, "wait", containerID)
waitCmdOut := bytes.NewBuffer(nil)
waitCmd.Stdout = waitCmdOut
c.Assert(waitCmd.Start(), checker.IsNil)
go func() {
chWait <- waitCmd.Wait()
}()
dockerCmd(c, "stop", containerID)
select {
case err := <-chWait:
c.Assert(err, checker.IsNil, check.Commentf(waitCmdOut.String()))
status, err := waitCmdOut.ReadString('\n')
c.Assert(err, checker.IsNil)
c.Assert(strings.TrimSpace(status), checker.Equals, "99", check.Commentf("expected exit 99, got %s", status))
case <-time.After(2 * time.Second):
waitCmd.Process.Kill()
c.Fatal("timeout waiting for `docker wait` to exit")
}
}