Using checkers assert for integration-cli/docker_cli_events_test.go

Signed-off-by: Mohammed Aaqib Ansari <maaquib@gmail.com>

integration-cli/docker_cli_events_test.go

@@ -39,12 +39,8 @@ func (s *DockerSuite) TestEventsTimestampFormats(c *check.C) {
 		since, until := f(start), f(end)
 		out, _ := dockerCmd(c, "events", "--since="+since, "--until="+until)
 		events := strings.Split(strings.TrimSpace(out), "\n")
-		if len(events) != 2 {
-			c.Fatalf("unexpected events, was expecting only 2 events tag/untag (since=%s, until=%s) out=%s", since, until, out)
-		}
-		if !strings.Contains(out, "untag") {
-			c.Fatalf("expected 'untag' event not found (since=%s, until=%s) out=%s", since, until, out)
-		}
+		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))
 	}
 
 }
@@ -58,18 +54,15 @@ func (s *DockerSuite) TestEventsUntag(c *check.C) {
 	dockerCmd(c, "rmi", "utest:tag2")
 	eventsCmd := exec.Command(dockerBinary, "events", "--since=1")
 	out, exitCode, _, err := runCommandWithOutputForDuration(eventsCmd, time.Duration(time.Millisecond*200))
-	if exitCode != 0 || err != nil {
-		c.Fatalf("Failed to get events - exit code %d: %s", exitCode, err)
-	}
+	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] {
-		if !strings.Contains(v, "untag") {
-			c.Fatalf("event should be untag, not %#v", v)
-		}
+		c.Assert(v, checker.Contains, "untag", check.Commentf("event should be untag"))
 	}
 }
 
@@ -77,25 +70,18 @@ func (s *DockerSuite) TestEventsContainerFailStartDie(c *check.C) {
 
 	out, _ := dockerCmd(c, "images", "-q")
 	image := strings.Split(out, "\n")[0]
-	if _, _, err := dockerCmdWithError("run", "--name", "testeventdie", image, "blerg"); err == nil {
-		c.Fatalf("Container run with command blerg should have failed, but it did not")
-	}
+	_, _, 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(out, "\n")
-	if len(events) <= 1 {
-		c.Fatalf("Missing expected event")
-	}
+	c.Assert(len(events), checker.GreaterThan, 1) //Missing expected event
 
 	startEvent := strings.Fields(events[len(events)-3])
 	dieEvent := strings.Fields(events[len(events)-2])
 
-	if startEvent[len(startEvent)-1] != "start" {
-		c.Fatalf("event should be start, not %#v", startEvent)
-	}
-	if dieEvent[len(dieEvent)-1] != "die" {
-		c.Fatalf("event should be die, not %#v", dieEvent)
-	}
+	c.Assert(startEvent[len(startEvent)-1], checker.Equals, "start", check.Commentf("event should be start, not %#v", startEvent))
+	c.Assert(dieEvent[len(dieEvent)-1], checker.Equals, "die", check.Commentf("event should be die, not %#v", dieEvent))
 
 }
 
@@ -117,17 +103,13 @@ func (s *DockerSuite) TestEventsLimit(c *check.C) {
 	close(errChan)
 
 	for err := range errChan {
-		if err != nil {
-			c.Fatalf("%q failed with error: %v", strings.Join(args, " "), err)
-		}
+		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
-	if nEvents != 64 {
-		c.Fatalf("events should be limited to 64, but received %d", nEvents)
-	}
+	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) {
@@ -136,29 +118,17 @@ func (s *DockerSuite) TestEventsContainerEvents(c *check.C) {
 	out, _ := dockerCmd(c, "events", "--since=0", fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
 	events := strings.Split(out, "\n")
 	events = events[:len(events)-1]
-	if len(events) < 5 {
-		c.Fatalf("Missing expected event")
-	}
+	c.Assert(len(events), checker.GreaterOrEqualThan, 5) //Missing expected event
 	createEvent := strings.Fields(events[len(events)-5])
 	attachEvent := strings.Fields(events[len(events)-4])
 	startEvent := strings.Fields(events[len(events)-3])
 	dieEvent := strings.Fields(events[len(events)-2])
 	destroyEvent := strings.Fields(events[len(events)-1])
-	if createEvent[len(createEvent)-1] != "create" {
-		c.Fatalf("event should be create, not %#v", createEvent)
-	}
-	if attachEvent[len(attachEvent)-1] != "attach" {
-		c.Fatalf("event should be attach, not %#v", attachEvent)
-	}
-	if startEvent[len(startEvent)-1] != "start" {
-		c.Fatalf("event should be start, not %#v", startEvent)
-	}
-	if dieEvent[len(dieEvent)-1] != "die" {
-		c.Fatalf("event should be die, not %#v", dieEvent)
-	}
-	if destroyEvent[len(destroyEvent)-1] != "destroy" {
-		c.Fatalf("event should be destroy, not %#v", destroyEvent)
-	}
+	c.Assert(createEvent[len(createEvent)-1], checker.Equals, "create", check.Commentf("event should be create, not %#v", createEvent))
+	c.Assert(attachEvent[len(attachEvent)-1], checker.Equals, "attach", check.Commentf("event should be attach, not %#v", attachEvent))
+	c.Assert(startEvent[len(startEvent)-1], checker.Equals, "start", check.Commentf("event should be start, not %#v", startEvent))
+	c.Assert(dieEvent[len(dieEvent)-1], checker.Equals, "die", check.Commentf("event should be die, not %#v", dieEvent))
+	c.Assert(destroyEvent[len(destroyEvent)-1], checker.Equals, "destroy", check.Commentf("event should be destroy, not %#v", destroyEvent))
 
 }
 
@@ -171,29 +141,17 @@ func (s *DockerSuite) TestEventsContainerEventsSinceUnixEpoch(c *check.C) {
 		fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
 	events := strings.Split(out, "\n")
 	events = events[:len(events)-1]
-	if len(events) < 5 {
-		c.Fatalf("Missing expected event")
-	}
+	c.Assert(len(events), checker.GreaterOrEqualThan, 5) //Missing expected event
 	createEvent := strings.Fields(events[len(events)-5])
 	attachEvent := strings.Fields(events[len(events)-4])
 	startEvent := strings.Fields(events[len(events)-3])
 	dieEvent := strings.Fields(events[len(events)-2])
 	destroyEvent := strings.Fields(events[len(events)-1])
-	if createEvent[len(createEvent)-1] != "create" {
-		c.Fatalf("event should be create, not %#v", createEvent)
-	}
-	if attachEvent[len(attachEvent)-1] != "attach" {
-		c.Fatalf("event should be attach, not %#v", attachEvent)
-	}
-	if startEvent[len(startEvent)-1] != "start" {
-		c.Fatalf("event should be start, not %#v", startEvent)
-	}
-	if dieEvent[len(dieEvent)-1] != "die" {
-		c.Fatalf("event should be die, not %#v", dieEvent)
-	}
-	if destroyEvent[len(destroyEvent)-1] != "destroy" {
-		c.Fatalf("event should be destroy, not %#v", destroyEvent)
-	}
+	c.Assert(createEvent[len(createEvent)-1], checker.Equals, "create", check.Commentf("event should be create, not %#v", createEvent))
+	c.Assert(attachEvent[len(attachEvent)-1], checker.Equals, "attach", check.Commentf("event should be attach, not %#v", attachEvent))
+	c.Assert(startEvent[len(startEvent)-1], checker.Equals, "start", check.Commentf("event should be start, not %#v", startEvent))
+	c.Assert(dieEvent[len(dieEvent)-1], checker.Equals, "die", check.Commentf("event should be die, not %#v", dieEvent))
+	c.Assert(destroyEvent[len(destroyEvent)-1], checker.Equals, "destroy", check.Commentf("event should be destroy, not %#v", destroyEvent))
 
 }
 
@@ -204,27 +162,17 @@ func (s *DockerSuite) TestEventsImageUntagDelete(c *check.C) {
 		`FROM scratch
 		MAINTAINER "docker"`,
 		true)
-	if err != nil {
-		c.Fatal(err)
-	}
-	if err := deleteImages(name); err != nil {
-		c.Fatal(err)
-	}
+	c.Assert(err, checker.IsNil)
+	c.Assert(deleteImages(name), checker.IsNil)
 	out, _ := dockerCmd(c, "events", "--since=0", fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
 	events := strings.Split(out, "\n")
 
 	events = events[:len(events)-1]
-	if len(events) < 2 {
-		c.Fatalf("Missing expected event")
-	}
+	c.Assert(len(events), checker.GreaterOrEqualThan, 2) //Missing expected event
 	untagEvent := strings.Fields(events[len(events)-2])
 	deleteEvent := strings.Fields(events[len(events)-1])
-	if untagEvent[len(untagEvent)-1] != "untag" {
-		c.Fatalf("untag should be untag, not %#v", untagEvent)
-	}
-	if deleteEvent[len(deleteEvent)-1] != "delete" {
-		c.Fatalf("delete should be delete, not %#v", deleteEvent)
-	}
+	c.Assert(untagEvent[len(untagEvent)-1], checker.Equals, "untag", check.Commentf("untag should be untag, not %#v", untagEvent))
+	c.Assert(deleteEvent[len(deleteEvent)-1], checker.Equals, "delete", check.Commentf("untag should be delete, not %#v", untagEvent))
 }
 
 func (s *DockerSuite) TestEventsImageTag(c *check.C) {
@@ -239,15 +187,11 @@ func (s *DockerSuite) TestEventsImageTag(c *check.C) {
 		fmt.Sprintf("--until=%d", daemonTime(c).Unix()))
 
 	events := strings.Split(strings.TrimSpace(out), "\n")
-	if len(events) != 1 {
-		c.Fatalf("was expecting 1 event. out=%s", out)
-	}
+	c.Assert(events, checker.HasLen, 1, check.Commentf("was expecting 1 event. out=%s", out))
 	event := strings.TrimSpace(events[0])
 	expectedStr := image + ": tag"
 
-	if !strings.HasSuffix(event, expectedStr) {
-		c.Fatalf("wrong event format. expected='%s' got=%s", expectedStr, event)
-	}
+	c.Assert(event, checker.HasSuffix, expectedStr, check.Commentf("wrong event format. expected='%s' got=%s", expectedStr, event))
 
 }
 
@@ -265,9 +209,7 @@ func (s *DockerSuite) TestEventsImagePull(c *check.C) {
 	events := strings.Split(strings.TrimSpace(out), "\n")
 	event := strings.TrimSpace(events[len(events)-1])
 
-	if !strings.HasSuffix(event, "hello-world:latest: pull") {
-		c.Fatalf("Missing pull event - got:%q", event)
-	}
+	c.Assert(event, checker.HasSuffix, "hello-world:latest: pull", check.Commentf("Missing pull event - got:%q", event))
 
 }
 
@@ -279,12 +221,8 @@ func (s *DockerSuite) TestEventsImageImport(c *check.C) {
 	eventImport := make(chan struct{})
 	eventsCmd := exec.Command(dockerBinary, "events", "--since", strconv.FormatInt(since, 10))
 	stdout, err := eventsCmd.StdoutPipe()
-	if err != nil {
-		c.Fatal(err)
-	}
-	if err := eventsCmd.Start(); err != nil {
-		c.Fatal(err)
-	}
+	c.Assert(err, checker.IsNil)
+	c.Assert(eventsCmd.Start(), checker.IsNil)
 	defer eventsCmd.Process.Kill()
 
 	go func() {
@@ -306,9 +244,7 @@ func (s *DockerSuite) TestEventsImageImport(c *check.C) {
 		exec.Command(dockerBinary, "export", cleanedContainerID),
 		exec.Command(dockerBinary, "import", "-"),
 	)
-	if err != nil {
-		c.Errorf("import failed with errors: %v, output: %q", err, out)
-	}
+	c.Assert(err, checker.IsNil, check.Commentf("import failed with output: %q", out))
 	newContainerID := strings.TrimSpace(out)
 	id <- newContainerID
 
@@ -328,9 +264,7 @@ func (s *DockerSuite) TestEventsFilters(c *check.C) {
 		for _, event := range events {
 			eventFields := strings.Fields(event)
 			eventName := eventFields[len(eventFields)-1]
-			if ok, err := regexp.MatchString(match, eventName); err != nil || !ok {
-				c.Fatalf("event should match %s, got %#v, err: %v", match, eventFields, err)
-			}
+			c.Assert(eventName, checker.Matches, match)
 		}
 	}
 
@@ -345,9 +279,7 @@ func (s *DockerSuite) TestEventsFilters(c *check.C) {
 
 	// make sure we at least got 2 start events
 	count := strings.Count(out, "start")
-	if count < 2 {
-		c.Fatalf("should have had 2 start events but had %d, out: %s", count, out)
-	}
+	c.Assert(strings.Count(out, "start"), checker.GreaterOrEqualThan, 2, check.Commentf("should have had 2 start events but had %d, out: %s", count, out))
 
 }
 
@@ -365,9 +297,7 @@ func (s *DockerSuite) TestEventsFilterImageName(c *check.C) {
 	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]
-	if len(events) == 0 {
-		c.Fatalf("Expected events but found none for the image busybox:latest")
-	}
+	c.Assert(events, checker.Not(checker.HasLen), 0) //Expected events but found none for the image busybox:latest
 	count1 := 0
 	count2 := 0
 
@@ -378,9 +308,8 @@ func (s *DockerSuite) TestEventsFilterImageName(c *check.C) {
 			count2++
 		}
 	}
-	if count1 == 0 || count2 == 0 {
-		c.Fatalf("Expected events from each container but got %d from %s and %d from %s", count1, container1, count2, container2)
-	}
+	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))
 
 }
 
@@ -407,7 +336,7 @@ func (s *DockerSuite) TestEventsFilterLabels(c *check.C) {
 
 	for _, e := range events {
 		c.Assert(e, checker.Contains, container1)
-		c.Assert(e, check.Not(checker.Contains), container2)
+		c.Assert(e, checker.Not(checker.Contains), container2)
 	}
 }
 
@@ -421,9 +350,7 @@ func (s *DockerSuite) TestEventsFilterImageLabels(c *check.C) {
 	_, err := buildImage(name, fmt.Sprintf(`
 		FROM busybox:latest
 		LABEL %s`, label), true)
-	if err != nil {
-		c.Fatalf("Couldn't create image: %q", err)
-	}
+	c.Assert(err, checker.IsNil, check.Commentf("Couldn't create image"))
 
 	dockerCmd(c, "tag", name, "labelfiltertest:tag1")
 	dockerCmd(c, "tag", name, "labelfiltertest:tag2")
@@ -439,7 +366,7 @@ func (s *DockerSuite) TestEventsFilterImageLabels(c *check.C) {
 	events := strings.Split(strings.TrimSpace(out), "\n")
 
 	// 2 events from the "docker tag" command, another one is from "docker build"
-	c.Assert(len(events), checker.Equals, 3, check.Commentf("Events == %s", events))
+	c.Assert(events, checker.HasLen, 3, check.Commentf("Events == %s", events))
 	for _, e := range events {
 		c.Assert(e, checker.Contains, "labelfiltertest")
 	}
@@ -453,9 +380,7 @@ func (s *DockerSuite) TestEventsFilterContainer(c *check.C) {
 	for _, name := range []string{"container_1", "container_2"} {
 		dockerCmd(c, "run", "--name", name, "busybox", "true")
 		id, err := inspectField(name, "Id")
-		if err != nil {
-			c.Fatal(err)
-		}
+		c.Assert(err, checker.IsNil)
 		nameID[name] = id
 	}
 
@@ -484,16 +409,12 @@ func (s *DockerSuite) TestEventsFilterContainer(c *check.C) {
 		// filter by names
 		out, _ := dockerCmd(c, "events", "--since", since, "--until", until, "--filter", "container="+name)
 		events := strings.Split(strings.TrimSuffix(out, "\n"), "\n")
-		if err := checkEvents(ID, events); err != nil {
-			c.Fatal(err)
-		}
+		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")
-		if err := checkEvents(ID, events); err != nil {
-			c.Fatal(err)
-		}
+		c.Assert(checkEvents(ID, events), checker.IsNil)
 	}
 }
 
@@ -509,12 +430,8 @@ func (s *DockerSuite) TestEventsStreaming(c *check.C) {
 
 	eventsCmd := exec.Command(dockerBinary, "events", "--since", strconv.FormatInt(start, 10))
 	stdout, err := eventsCmd.StdoutPipe()
-	if err != nil {
-		c.Fatal(err)
-	}
-	if err := eventsCmd.Start(); err != nil {
-		c.Fatalf("failed to start 'docker events': %s", err)
-	}
+	c.Assert(err, checker.IsNil)
+	c.Assert(eventsCmd.Start(), checker.IsNil, check.Commentf("failed to start 'docker events'"))
 	defer eventsCmd.Process.Kill()
 
 	go func() {
@@ -581,15 +498,13 @@ func (s *DockerSuite) TestEventsCommit(c *check.C) {
 
 	out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
 	cID := strings.TrimSpace(out)
-	c.Assert(waitRun(cID), check.IsNil)
+	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)))
-	if !strings.Contains(out, " commit\n") {
-		c.Fatalf("Missing 'commit' log event\n%s", out)
-	}
+	c.Assert(out, checker.Contains, " commit\n", check.Commentf("Missing 'commit' log event"))
 }
 
 func (s *DockerSuite) TestEventsCopy(c *check.C) {
@@ -600,36 +515,26 @@ func (s *DockerSuite) TestEventsCopy(c *check.C) {
 	id, err := buildImage("cpimg", `
 		  FROM busybox
 		  RUN echo HI > /tmp/file`, true)
-	if err != nil {
-		c.Fatalf("Couldn't create image: %q", err)
-	}
+	c.Assert(err, checker.IsNil, check.Commentf("Couldn't create image"))
 
 	// Create an empty test file.
 	tempFile, err := ioutil.TempFile("", "test-events-copy-")
-	if err != nil {
-		c.Fatal(err)
-	}
+	c.Assert(err, checker.IsNil)
 	defer os.Remove(tempFile.Name())
 
-	if err := tempFile.Close(); err != nil {
-		c.Fatal(err)
-	}
+	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)))
-	if !strings.Contains(out, " archive-path\n") {
-		c.Fatalf("Missing 'archive-path' log event\n%s", out)
-	}
+	c.Assert(out, checker.Contains, " archive-path\n", 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)))
-	if !strings.Contains(out, " extract-to-dir\n") {
-		c.Fatalf("Missing 'extract-to-dir' log event\n%s", out)
-	}
+	c.Assert(out, checker.Contains, " extract-to-dir\n", check.Commentf("Missing 'extract-to-dir' log event"))
 }
 
 func (s *DockerSuite) TestEventsResize(c *check.C) {
@@ -638,19 +543,17 @@ func (s *DockerSuite) TestEventsResize(c *check.C) {
 
 	out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
 	cID := strings.TrimSpace(out)
-	c.Assert(waitRun(cID), check.IsNil)
+	c.Assert(waitRun(cID), checker.IsNil)
 
 	endpoint := "/containers/" + cID + "/resize?h=80&w=24"
 	status, _, err := sockRequest("POST", endpoint, nil)
-	c.Assert(status, check.Equals, http.StatusOK)
-	c.Assert(err, check.IsNil)
+	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)))
-	if !strings.Contains(out, " resize\n") {
-		c.Fatalf("Missing 'resize' log event\n%s", out)
-	}
+	c.Assert(out, checker.Contains, " resize\n", check.Commentf("Missing 'resize' log event"))
 }
 
 func (s *DockerSuite) TestEventsAttach(c *check.C) {
@@ -662,32 +565,27 @@ func (s *DockerSuite) TestEventsAttach(c *check.C) {
 
 	cmd := exec.Command(dockerBinary, "attach", cID)
 	stdin, err := cmd.StdinPipe()
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	defer stdin.Close()
 	stdout, err := cmd.StdoutPipe()
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	defer stdout.Close()
-	c.Assert(cmd.Start(), check.IsNil)
+	c.Assert(cmd.Start(), checker.IsNil)
 	defer cmd.Process.Kill()
 
 	// Make sure we're done attaching by writing/reading some stuff
-	if _, err := stdin.Write([]byte("hello\n")); err != nil {
-		c.Fatal(err)
-	}
+	_, err = stdin.Write([]byte("hello\n"))
+	c.Assert(err, checker.IsNil)
 	out, err = bufio.NewReader(stdout).ReadString('\n')
-	c.Assert(err, check.IsNil)
-	if strings.TrimSpace(out) != "hello" {
-		c.Fatalf("expected 'hello', got %q", out)
-	}
+	c.Assert(err, checker.IsNil)
+	c.Assert(strings.TrimSpace(out), checker.Equals, "hello", check.Commentf("expected 'hello'"))
 
-	c.Assert(stdin.Close(), check.IsNil)
+	c.Assert(stdin.Close(), checker.IsNil)
 
 	dockerCmd(c, "stop", cID)
 
 	out, _ = dockerCmd(c, "events", "--since=0", "-f", "container="+cID, "--until="+strconv.Itoa(int(since)))
-	if !strings.Contains(out, " attach\n") {
-		c.Fatalf("Missing 'attach' log event\n%s", out)
-	}
+	c.Assert(out, checker.Contains, " attach\n", check.Commentf("Missing 'attach' log event"))
 }
 
 func (s *DockerSuite) TestEventsRename(c *check.C) {
@@ -698,9 +596,7 @@ func (s *DockerSuite) TestEventsRename(c *check.C) {
 	dockerCmd(c, "rename", "oldName", "newName")
 
 	out, _ := dockerCmd(c, "events", "--since=0", "-f", "container=newName", "--until="+strconv.Itoa(int(since)))
-	if !strings.Contains(out, " rename\n") {
-		c.Fatalf("Missing 'rename' log event\n%s", out)
-	}
+	c.Assert(out, checker.Contains, " rename\n", check.Commentf("Missing 'rename' log event\n"))
 }
 
 func (s *DockerSuite) TestEventsTop(c *check.C) {
@@ -709,15 +605,13 @@ func (s *DockerSuite) TestEventsTop(c *check.C) {
 
 	out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
 	cID := strings.TrimSpace(out)
-	c.Assert(waitRun(cID), check.IsNil)
+	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)))
-	if !strings.Contains(out, " top\n") {
-		c.Fatalf("Missing 'top' log event\n%s", out)
-	}
+	c.Assert(out, checker.Contains, " top\n", check.Commentf("Missing 'top' log event"))
 }
 
 // #13753
@@ -725,7 +619,7 @@ 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), check.Equals, "")
+	c.Assert(strings.TrimSpace(out), checker.Equals, "")
 }
 
 // #14316
@@ -737,14 +631,12 @@ func (s *DockerRegistrySuite) TestEventsImageFilterPush(c *check.C) {
 
 	out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
 	cID := strings.TrimSpace(out)
-	c.Assert(waitRun(cID), check.IsNil)
+	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)))
-	if !strings.Contains(out, repoName+": push\n") {
-		c.Fatalf("Missing 'push' log event for image %s\n%s", repoName, out)
-	}
+	c.Assert(out, checker.Contains, repoName+": push\n", check.Commentf("Missing 'push' log event"))
 }