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moby--moby/integration-cli/docker_cli_events_test.go
David Calavera 851fe00c64 Add filter by event type and documentation.
Signed-off-by: David Calavera <david.calavera@gmail.com>
2016-01-04 14:58:04 -05:00

587 lines
21 KiB
Go

package main
import (
"bufio"
"fmt"
"io/ioutil"
"net/http"
"os"
"os/exec"
"strconv"
"strings"
"sync"
"time"
"github.com/docker/docker/pkg/integration/checker"
"github.com/go-check/check"
)
func (s *DockerSuite) TestEventsTimestampFormats(c *check.C) {
testRequires(c, DaemonIsLinux)
image := "busybox"
// Start stopwatch, generate an event
time.Sleep(1 * time.Second) // so that we don't grab events from previous test occured in the same second
start := daemonTime(c)
dockerCmd(c, "tag", image, "timestamptest:1")
dockerCmd(c, "rmi", "timestamptest:1")
time.Sleep(1 * time.Second) // so that until > since
end := daemonTime(c)
// List of available time formats to --since
unixTs := func(t time.Time) string { return fmt.Sprintf("%v", t.Unix()) }
rfc3339 := func(t time.Time) string { return t.Format(time.RFC3339) }
duration := func(t time.Time) string { return time.Now().Sub(t).String() }
// --since=$start must contain only the 'untag' event
for _, f := range []func(time.Time) string{unixTs, rfc3339, duration} {
since, until := f(start), f(end)
out, _ := dockerCmd(c, "events", "--since="+since, "--until="+until)
events := strings.Split(strings.TrimSpace(out), "\n")
c.Assert(events, checker.HasLen, 2, check.Commentf("unexpected events, was expecting only 2 events tag/untag (since=%s, until=%s) out=%s", since, until, out))
c.Assert(out, checker.Contains, "untag", check.Commentf("expected 'untag' event not found (since=%s, until=%s)", since, until))
}
}
func (s *DockerSuite) TestEventsUntag(c *check.C) {
testRequires(c, DaemonIsLinux)
image := "busybox"
dockerCmd(c, "tag", image, "utest:tag1")
dockerCmd(c, "tag", image, "utest:tag2")
dockerCmd(c, "rmi", "utest:tag1")
dockerCmd(c, "rmi", "utest:tag2")
eventsCmd := exec.Command(dockerBinary, "events", "--since=1")
out, exitCode, _, err := runCommandWithOutputForDuration(eventsCmd, time.Duration(time.Millisecond*2500))
c.Assert(err, checker.IsNil)
c.Assert(exitCode, checker.Equals, 0, check.Commentf("Failed to get events"))
events := strings.Split(out, "\n")
nEvents := len(events)
// The last element after the split above will be an empty string, so we
// get the two elements before the last, which are the untags we're
// looking for.
for _, v := range events[nEvents-3 : nEvents-1] {
c.Assert(v, checker.Contains, "untag", check.Commentf("event should be untag"))
}
}
func (s *DockerSuite) TestEventsContainerFailStartDie(c *check.C) {
out, _ := dockerCmd(c, "images", "-q")
image := strings.Split(out, "\n")[0]
_, _, err := dockerCmdWithError("run", "--name", "testeventdie", image, "blerg")
c.Assert(err, checker.NotNil, check.Commentf("Container run with command blerg should have failed, but it did not, out=%s", out))
out, _ = dockerCmd(c, "events", "--since=0", fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
events := strings.Split(strings.TrimSpace(out), "\n")
nEvents := len(events)
c.Assert(nEvents, checker.GreaterOrEqualThan, 1) //Missing expected event
actions := eventActionsByIDAndType(c, events, "testeventdie", "container")
var startEvent bool
var dieEvent bool
for _, a := range actions {
switch a {
case "start":
startEvent = true
case "die":
dieEvent = true
}
}
c.Assert(startEvent, checker.True, check.Commentf("Start event not found: %v\n%v", actions, events))
c.Assert(dieEvent, checker.True, check.Commentf("Die event not found: %v\n%v", actions, events))
}
func (s *DockerSuite) TestEventsLimit(c *check.C) {
testRequires(c, DaemonIsLinux)
var waitGroup sync.WaitGroup
errChan := make(chan error, 17)
args := []string{"run", "--rm", "busybox", "true"}
for i := 0; i < 17; i++ {
waitGroup.Add(1)
go func() {
defer waitGroup.Done()
errChan <- exec.Command(dockerBinary, args...).Run()
}()
}
waitGroup.Wait()
close(errChan)
for err := range errChan {
c.Assert(err, checker.IsNil, check.Commentf("%q failed with error", strings.Join(args, " ")))
}
out, _ := dockerCmd(c, "events", "--since=0", fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
events := strings.Split(out, "\n")
nEvents := len(events) - 1
c.Assert(nEvents, checker.Equals, 64, check.Commentf("events should be limited to 64, but received %d", nEvents))
}
func (s *DockerSuite) TestEventsContainerEvents(c *check.C) {
testRequires(c, DaemonIsLinux)
containerID, _ := dockerCmd(c, "run", "--rm", "--name", "container-events-test", "busybox", "true")
containerID = strings.TrimSpace(containerID)
out, _ := dockerCmd(c, "events", "--since=0", fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
events := strings.Split(out, "\n")
events = events[:len(events)-1]
nEvents := len(events)
c.Assert(nEvents, checker.GreaterOrEqualThan, 5) //Missing expected event
containerEvents := eventActionsByIDAndType(c, events, "container-events-test", "container")
c.Assert(containerEvents, checker.HasLen, 5, check.Commentf("events: %v", events))
c.Assert(containerEvents[0], checker.Equals, "create", check.Commentf(out))
c.Assert(containerEvents[1], checker.Equals, "attach", check.Commentf(out))
c.Assert(containerEvents[2], checker.Equals, "start", check.Commentf(out))
c.Assert(containerEvents[3], checker.Equals, "die", check.Commentf(out))
c.Assert(containerEvents[4], checker.Equals, "destroy", check.Commentf(out))
}
func (s *DockerSuite) TestEventsContainerEventsSinceUnixEpoch(c *check.C) {
testRequires(c, DaemonIsLinux)
dockerCmd(c, "run", "--rm", "--name", "since-epoch-test", "busybox", "true")
timeBeginning := time.Unix(0, 0).Format(time.RFC3339Nano)
timeBeginning = strings.Replace(timeBeginning, "Z", ".000000000Z", -1)
out, _ := dockerCmd(c, "events", fmt.Sprintf("--since='%s'", timeBeginning), fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
events := strings.Split(out, "\n")
events = events[:len(events)-1]
nEvents := len(events)
c.Assert(nEvents, checker.GreaterOrEqualThan, 5) //Missing expected event
containerEvents := eventActionsByIDAndType(c, events, "since-epoch-test", "container")
c.Assert(containerEvents, checker.HasLen, 5, check.Commentf("events: %v", events))
c.Assert(containerEvents[0], checker.Equals, "create", check.Commentf(out))
c.Assert(containerEvents[1], checker.Equals, "attach", check.Commentf(out))
c.Assert(containerEvents[2], checker.Equals, "start", check.Commentf(out))
c.Assert(containerEvents[3], checker.Equals, "die", check.Commentf(out))
c.Assert(containerEvents[4], checker.Equals, "destroy", check.Commentf(out))
}
func (s *DockerSuite) TestEventsImageTag(c *check.C) {
testRequires(c, DaemonIsLinux)
time.Sleep(1 * time.Second) // because API has seconds granularity
since := daemonTime(c).Unix()
image := "testimageevents:tag"
dockerCmd(c, "tag", "busybox", image)
out, _ := dockerCmd(c, "events",
fmt.Sprintf("--since=%d", since),
fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
events := strings.Split(strings.TrimSpace(out), "\n")
c.Assert(events, checker.HasLen, 1, check.Commentf("was expecting 1 event. out=%s", out))
event := strings.TrimSpace(events[0])
matches := parseEventText(event)
c.Assert(matchEventID(matches, image), checker.True, check.Commentf("matches: %v\nout:\n%s", matches, out))
c.Assert(matches["action"], checker.Equals, "tag")
}
func (s *DockerSuite) TestEventsImagePull(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
testRequires(c, Network)
dockerCmd(c, "pull", "hello-world")
out, _ := dockerCmd(c, "events",
fmt.Sprintf("--since=%d", since),
fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
events := strings.Split(strings.TrimSpace(out), "\n")
event := strings.TrimSpace(events[len(events)-1])
matches := parseEventText(event)
c.Assert(matches["id"], checker.Equals, "hello-world:latest")
c.Assert(matches["action"], checker.Equals, "pull")
}
func (s *DockerSuite) TestEventsImageImport(c *check.C) {
testRequires(c, DaemonIsLinux)
out, _ := dockerCmd(c, "run", "-d", "busybox", "true")
cleanedContainerID := strings.TrimSpace(out)
since := daemonTime(c).Unix()
out, _, err := runCommandPipelineWithOutput(
exec.Command(dockerBinary, "export", cleanedContainerID),
exec.Command(dockerBinary, "import", "-"),
)
c.Assert(err, checker.IsNil, check.Commentf("import failed with output: %q", out))
imageRef := strings.TrimSpace(out)
out, _ = dockerCmd(c, "events", fmt.Sprintf("--since=%d", since), fmt.Sprintf("--until=%d", daemonTime(c).Unix()), "--filter", "event=import")
events := strings.Split(strings.TrimSpace(out), "\n")
c.Assert(events, checker.HasLen, 1)
matches := parseEventText(events[0])
c.Assert(matches["id"], checker.Equals, imageRef, check.Commentf("matches: %v\nout:\n%s\n", matches, out))
c.Assert(matches["action"], checker.Equals, "import", check.Commentf("matches: %v\nout:\n%s\n", matches, out))
}
func (s *DockerSuite) TestEventsFilters(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
dockerCmd(c, "run", "--rm", "busybox", "true")
dockerCmd(c, "run", "--rm", "busybox", "true")
out, _ := dockerCmd(c, "events", fmt.Sprintf("--since=%d", since), fmt.Sprintf("--until=%d", daemonTime(c).Unix()), "--filter", "event=die")
parseEvents(c, out, "die")
out, _ = dockerCmd(c, "events", fmt.Sprintf("--since=%d", since), fmt.Sprintf("--until=%d", daemonTime(c).Unix()), "--filter", "event=die", "--filter", "event=start")
parseEvents(c, out, "die|start")
// make sure we at least got 2 start events
count := strings.Count(out, "start")
c.Assert(strings.Count(out, "start"), checker.GreaterOrEqualThan, 2, check.Commentf("should have had 2 start events but had %d, out: %s", count, out))
}
func (s *DockerSuite) TestEventsFilterImageName(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
out, _ := dockerCmd(c, "run", "--name", "container_1", "-d", "busybox:latest", "true")
container1 := strings.TrimSpace(out)
out, _ = dockerCmd(c, "run", "--name", "container_2", "-d", "busybox", "true")
container2 := strings.TrimSpace(out)
name := "busybox"
out, _ = dockerCmd(c, "events", fmt.Sprintf("--since=%d", since), fmt.Sprintf("--until=%d", daemonTime(c).Unix()), "--filter", fmt.Sprintf("image=%s", name))
events := strings.Split(out, "\n")
events = events[:len(events)-1]
c.Assert(events, checker.Not(checker.HasLen), 0) //Expected events but found none for the image busybox:latest
count1 := 0
count2 := 0
for _, e := range events {
if strings.Contains(e, container1) {
count1++
} else if strings.Contains(e, container2) {
count2++
}
}
c.Assert(count1, checker.Not(checker.Equals), 0, check.Commentf("Expected event from container but got %d from %s", count1, container1))
c.Assert(count2, checker.Not(checker.Equals), 0, check.Commentf("Expected event from container but got %d from %s", count2, container2))
}
func (s *DockerSuite) TestEventsFilterLabels(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
label := "io.docker.testing=foo"
out, _ := dockerCmd(c, "run", "-d", "-l", label, "busybox:latest", "true")
container1 := strings.TrimSpace(out)
out, _ = dockerCmd(c, "run", "-d", "busybox", "true")
container2 := strings.TrimSpace(out)
out, _ = dockerCmd(
c,
"events",
fmt.Sprintf("--since=%d", since),
fmt.Sprintf("--until=%d", daemonTime(c).Unix()),
"--filter", fmt.Sprintf("label=%s", label))
events := strings.Split(strings.TrimSpace(out), "\n")
c.Assert(len(events), checker.Equals, 3)
for _, e := range events {
c.Assert(e, checker.Contains, container1)
c.Assert(e, checker.Not(checker.Contains), container2)
}
}
func (s *DockerSuite) TestEventsFilterImageLabels(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
name := "labelfiltertest"
label := "io.docker.testing=image"
// Build a test image.
_, err := buildImage(name, fmt.Sprintf(`
FROM busybox:latest
LABEL %s`, label), true)
c.Assert(err, checker.IsNil, check.Commentf("Couldn't create image"))
dockerCmd(c, "tag", name, "labelfiltertest:tag1")
dockerCmd(c, "tag", name, "labelfiltertest:tag2")
dockerCmd(c, "tag", "busybox:latest", "labelfiltertest:tag3")
out, _ := dockerCmd(
c,
"events",
fmt.Sprintf("--since=%d", since),
fmt.Sprintf("--until=%d", daemonTime(c).Unix()),
"--filter", fmt.Sprintf("label=%s", label),
"--filter", "type=image")
events := strings.Split(strings.TrimSpace(out), "\n")
// 2 events from the "docker tag" command, another one is from "docker build"
c.Assert(events, checker.HasLen, 3, check.Commentf("Events == %s", events))
for _, e := range events {
c.Assert(e, checker.Contains, "labelfiltertest")
}
}
func (s *DockerSuite) TestEventsFilterContainer(c *check.C) {
testRequires(c, DaemonIsLinux)
since := fmt.Sprintf("%d", daemonTime(c).Unix())
nameID := make(map[string]string)
for _, name := range []string{"container_1", "container_2"} {
dockerCmd(c, "run", "--name", name, "busybox", "true")
id, err := inspectField(name, "Id")
c.Assert(err, checker.IsNil)
nameID[name] = id
}
until := fmt.Sprintf("%d", daemonTime(c).Unix())
checkEvents := func(id string, events []string) error {
if len(events) != 4 { // create, attach, start, die
return fmt.Errorf("expected 4 events, got %v", events)
}
for _, event := range events {
matches := parseEventText(event)
if !matchEventID(matches, id) {
return fmt.Errorf("expected event for container id %s: %s - parsed container id: %s", id, event, matches["id"])
}
}
return nil
}
for name, ID := range nameID {
// filter by names
out, _ := dockerCmd(c, "events", "--since", since, "--until", until, "--filter", "container="+name)
events := strings.Split(strings.TrimSuffix(out, "\n"), "\n")
c.Assert(checkEvents(ID, events), checker.IsNil)
// filter by ID's
out, _ = dockerCmd(c, "events", "--since", since, "--until", until, "--filter", "container="+ID)
events = strings.Split(strings.TrimSuffix(out, "\n"), "\n")
c.Assert(checkEvents(ID, events), checker.IsNil)
}
}
func (s *DockerSuite) TestEventsCommit(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
cID := strings.TrimSpace(out)
c.Assert(waitRun(cID), checker.IsNil)
dockerCmd(c, "commit", "-m", "test", cID)
dockerCmd(c, "stop", cID)
out, _ = dockerCmd(c, "events", "--since=0", "-f", "container="+cID, "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, "commit", check.Commentf("Missing 'commit' log event"))
}
func (s *DockerSuite) TestEventsCopy(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
// Build a test image.
id, err := buildImage("cpimg", `
FROM busybox
RUN echo HI > /tmp/file`, true)
c.Assert(err, checker.IsNil, check.Commentf("Couldn't create image"))
// Create an empty test file.
tempFile, err := ioutil.TempFile("", "test-events-copy-")
c.Assert(err, checker.IsNil)
defer os.Remove(tempFile.Name())
c.Assert(tempFile.Close(), checker.IsNil)
dockerCmd(c, "create", "--name=cptest", id)
dockerCmd(c, "cp", "cptest:/tmp/file", tempFile.Name())
out, _ := dockerCmd(c, "events", "--since=0", "-f", "container=cptest", "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, "archive-path", check.Commentf("Missing 'archive-path' log event\n"))
dockerCmd(c, "cp", tempFile.Name(), "cptest:/tmp/filecopy")
out, _ = dockerCmd(c, "events", "--since=0", "-f", "container=cptest", "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, "extract-to-dir", check.Commentf("Missing 'extract-to-dir' log event"))
}
func (s *DockerSuite) TestEventsResize(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
cID := strings.TrimSpace(out)
c.Assert(waitRun(cID), checker.IsNil)
endpoint := "/containers/" + cID + "/resize?h=80&w=24"
status, _, err := sockRequest("POST", endpoint, nil)
c.Assert(status, checker.Equals, http.StatusOK)
c.Assert(err, checker.IsNil)
dockerCmd(c, "stop", cID)
out, _ = dockerCmd(c, "events", "--since=0", "-f", "container="+cID, "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, "resize", check.Commentf("Missing 'resize' log event"))
}
func (s *DockerSuite) TestEventsAttach(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
out, _ := dockerCmd(c, "run", "-di", "busybox", "/bin/cat")
cID := strings.TrimSpace(out)
cmd := exec.Command(dockerBinary, "attach", cID)
stdin, err := cmd.StdinPipe()
c.Assert(err, checker.IsNil)
defer stdin.Close()
stdout, err := cmd.StdoutPipe()
c.Assert(err, checker.IsNil)
defer stdout.Close()
c.Assert(cmd.Start(), checker.IsNil)
defer cmd.Process.Kill()
// Make sure we're done attaching by writing/reading some stuff
_, err = stdin.Write([]byte("hello\n"))
c.Assert(err, checker.IsNil)
out, err = bufio.NewReader(stdout).ReadString('\n')
c.Assert(err, checker.IsNil)
c.Assert(strings.TrimSpace(out), checker.Equals, "hello", check.Commentf("expected 'hello'"))
c.Assert(stdin.Close(), checker.IsNil)
dockerCmd(c, "stop", cID)
out, _ = dockerCmd(c, "events", "--since=0", "-f", "container="+cID, "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, "attach", check.Commentf("Missing 'attach' log event"))
}
func (s *DockerSuite) TestEventsRename(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
dockerCmd(c, "run", "--name", "oldName", "busybox", "true")
dockerCmd(c, "rename", "oldName", "newName")
out, _ := dockerCmd(c, "events", "--since=0", "-f", "container=newName", "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, "rename", check.Commentf("Missing 'rename' log event\n"))
}
func (s *DockerSuite) TestEventsTop(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
cID := strings.TrimSpace(out)
c.Assert(waitRun(cID), checker.IsNil)
dockerCmd(c, "top", cID)
dockerCmd(c, "stop", cID)
out, _ = dockerCmd(c, "events", "--since=0", "-f", "container="+cID, "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, " top", check.Commentf("Missing 'top' log event"))
}
// #13753
func (s *DockerSuite) TestEventsDefaultEmpty(c *check.C) {
testRequires(c, DaemonIsLinux)
dockerCmd(c, "run", "busybox")
out, _ := dockerCmd(c, "events", fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
c.Assert(strings.TrimSpace(out), checker.Equals, "")
}
// #14316
func (s *DockerRegistrySuite) TestEventsImageFilterPush(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, Network)
since := daemonTime(c).Unix()
repoName := fmt.Sprintf("%v/dockercli/testf", privateRegistryURL)
out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
cID := strings.TrimSpace(out)
c.Assert(waitRun(cID), checker.IsNil)
dockerCmd(c, "commit", cID, repoName)
dockerCmd(c, "stop", cID)
dockerCmd(c, "push", repoName)
out, _ = dockerCmd(c, "events", "--since=0", "-f", "image="+repoName, "-f", "event=push", "--until="+strconv.Itoa(int(since)))
c.Assert(out, checker.Contains, repoName, check.Commentf("Missing 'push' log event for %s", repoName))
}
func (s *DockerSuite) TestEventsFilterType(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
name := "labelfiltertest"
label := "io.docker.testing=image"
// Build a test image.
_, err := buildImage(name, fmt.Sprintf(`
FROM busybox:latest
LABEL %s`, label), true)
c.Assert(err, checker.IsNil, check.Commentf("Couldn't create image"))
dockerCmd(c, "tag", name, "labelfiltertest:tag1")
dockerCmd(c, "tag", name, "labelfiltertest:tag2")
dockerCmd(c, "tag", "busybox:latest", "labelfiltertest:tag3")
out, _ := dockerCmd(
c,
"events",
fmt.Sprintf("--since=%d", since),
fmt.Sprintf("--until=%d", daemonTime(c).Unix()),
"--filter", fmt.Sprintf("label=%s", label),
"--filter", "type=image")
events := strings.Split(strings.TrimSpace(out), "\n")
// 2 events from the "docker tag" command, another one is from "docker build"
c.Assert(events, checker.HasLen, 3, check.Commentf("Events == %s", events))
for _, e := range events {
c.Assert(e, checker.Contains, "labelfiltertest")
}
out, _ = dockerCmd(
c,
"events",
fmt.Sprintf("--since=%d", since),
fmt.Sprintf("--until=%d", daemonTime(c).Unix()),
"--filter", fmt.Sprintf("label=%s", label),
"--filter", "type=container")
events = strings.Split(strings.TrimSpace(out), "\n")
// Events generated by the container that builds the image
c.Assert(events, checker.HasLen, 3, check.Commentf("Events == %s", events))
out, _ = dockerCmd(
c,
"events",
fmt.Sprintf("--since=%d", since),
fmt.Sprintf("--until=%d", daemonTime(c).Unix()),
"--filter", "type=network")
events = strings.Split(strings.TrimSpace(out), "\n")
c.Assert(len(events), checker.GreaterOrEqualThan, 1, check.Commentf("Events == %s", events))
}
func (s *DockerSuite) TestEventsFilterImageInContainerAction(c *check.C) {
testRequires(c, DaemonIsLinux)
since := daemonTime(c).Unix()
dockerCmd(c, "run", "--name", "test-container", "-d", "busybox", "true")
waitRun("test-container")
out, _ := dockerCmd(c, "events", "--filter", "image=busybox", fmt.Sprintf("--since=%d", since), fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
events := strings.Split(strings.TrimSpace(out), "\n")
c.Assert(len(events), checker.GreaterThan, 1, check.Commentf(out))
}