this patch do tow things:

1.add dry-run flag for create job subcommand
	2.add cmd-util test for create job subcommand
	modified:   pkg/kubectl/cmd/create_job.go
	modified:   hack/make-rules/test-cmd-util.sh

hack/make-rules/test-cmd-util.sh

@@ -77,6 +77,7 @@ selfsubjectaccessreviews="selfsubjectaccessreviews"
 customresourcedefinitions="customresourcedefinitions"
 daemonsets="daemonsets"
 controllerrevisions="controllerrevisions"
+job="jobs"
 
 
 # include shell2junit library
@@ -4006,6 +4007,46 @@ run_service_accounts_tests() {
   set +o errexit
 }
 
+run_job_tests() {
+  set -o nounset
+  set -o errexit
+
+  create_and_use_new_namespace
+  kube::log::status "Testing job"
+
+  ### Create a new namespace
+  # Pre-condition: the test-jobs namespace does not exist
+  kube::test::get_object_assert 'namespaces' '{{range.items}}{{ if eq $id_field \"test-jobs\" }}found{{end}}{{end}}:' ':'
+  # Command
+  kubectl create namespace test-jobs
+  # Post-condition: namespace 'test-jobs' is created.
+  kube::test::get_object_assert 'namespaces/test-jobs' "{{$id_field}}" 'test-jobs'
+
+  ### Create a cronjob in a specific namespace
+  kubectl run pi --schedule="59 23 31 2 *" --namespace=test-jobs --generator=cronjob/v1beta1 "--image=$IMAGE_PERL" --restart=OnFailure -- perl -Mbignum=bpi -wle 'print bpi(20)' "${kube_flags[@]}"
+  # Post-Condition: assertion object exists
+  kube::test::get_object_assert 'cronjob/pi --namespace=test-jobs' "{{$id_field}}" 'pi'
+
+  ### Create a job in dry-run mode
+  output_message=$(kubectl create job test-job --from=cronjob/pi --dry-run=true --namespace=test-jobs -o name)
+  # Post-condition: The text 'job.batch/test-job' should be part of the output
+  kube::test::if_has_string "${output_message}" 'job.batch/test-job'
+  # Post-condition: The test-job wasn't created actually
+  kube::test::get_object_assert jobs "{{range.items}}{{$id_field}}{{end}}" ''
+
+  ### Create a job in a specific namespace
+  kubectl create job test-job --from=cronjob/pi --namespace=test-jobs
+  # Post-Condition: assertion object exists
+  kube::test::get_object_assert 'job/test-job --namespace=test-jobs' "{{$id_field}}" 'test-job'
+  #Clean up
+  kubectl delete job test-job --namespace=test-jobs
+  kubectl delete cronjob pi --namespace=test-jobs
+  kubectl delete namespace test-jobs
+
+  set +o nounset
+  set +o errexit
+}
+
 run_pod_templates_tests() {
   set -o nounset
   set -o errexit
@@ -4980,6 +5021,14 @@ runTests() {
     record_command run_service_accounts_tests
   fi
 
+  ####################
+  # Job              #
+  ####################
+
+  if kube::test::if_supports_resource "${job}" ; then
+    record_command run_job_tests
+  fi
+
   #################
   # Pod templates #
   #################

pkg/kubectl/cmd/create_job.go

@@ -45,12 +45,13 @@ type CreateJobOptions struct {
 	Name string
 	From string
 
-	Namespace string
-	Client    clientbatchv1.BatchV1Interface
-	Out       io.Writer
-	DryRun    bool
-	Builder   *resource.Builder
-	Cmd       *cobra.Command
+	Namespace    string
+	OutputFormat string
+	Client       clientbatchv1.BatchV1Interface
+	Out          io.Writer
+	DryRun       bool
+	Builder      *resource.Builder
+	Cmd          *cobra.Command
 }
 
 // NewCmdCreateJob is a command to ease creating Jobs from CronJobs.
@@ -71,6 +72,7 @@ func NewCmdCreateJob(f cmdutil.Factory, cmdOut io.Writer) *cobra.Command {
 	cmdutil.AddApplyAnnotationFlags(cmd)
 	cmdutil.AddValidateFlags(cmd)
 	cmdutil.AddPrinterFlags(cmd)
+	cmdutil.AddDryRunFlag(cmd)
 	cmd.Flags().String("from", "", "The name of the resource to create a Job from (only cronjob is supported).")
 
 	return cmd
@@ -94,7 +96,9 @@ func (c *CreateJobOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args
 	}
 	c.Client = clientset.BatchV1()
 	c.Builder = f.NewBuilder()
+	c.DryRun = cmdutil.GetDryRunFlag(cmd)
 	c.Cmd = cmd
+	c.OutputFormat = cmdutil.GetFlagString(cmd, "output")
 
 	return nil
 }
@@ -128,7 +132,7 @@ func (c *CreateJobOptions) createJob(cronJob *batchv1beta1.CronJob) error {
 	for k, v := range cronJob.Spec.JobTemplate.Annotations {
 		annotations[k] = v
 	}
-	jobToCreate := &batchv1.Job{
+	job := &batchv1.Job{
 		ObjectMeta: metav1.ObjectMeta{
 			Name:        c.Name,
 			Namespace:   c.Namespace,
@@ -138,9 +142,18 @@ func (c *CreateJobOptions) createJob(cronJob *batchv1beta1.CronJob) error {
 		Spec: cronJob.Spec.JobTemplate.Spec,
 	}
 
-	job, err := c.Client.Jobs(c.Namespace).Create(jobToCreate)
-	if err != nil {
-		return fmt.Errorf("failed to create job: %v", err)
+	if !c.DryRun {
+		var err error
+		job, err = c.Client.Jobs(c.Namespace).Create(job)
+		if err != nil {
+			return fmt.Errorf("failed to create job: %v", err)
+		}
 	}
+
+	if useShortOutput := c.OutputFormat == "name"; useShortOutput || len(c.OutputFormat) == 0 {
+		cmdutil.PrintSuccess(useShortOutput, c.Out, job, c.DryRun, "created")
+		return nil
+	}
+
 	return cmdutil.PrintObject(c.Cmd, job, c.Out)
 }