provide standard iostream struct for commands

pkg/kubectl/cmd/create/create_configmap_test.go

@@ -29,6 +29,7 @@ import (
 	"k8s.io/client-go/rest/fake"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
+	"k8s.io/kubernetes/pkg/kubectl/genericclioptions"
 	"k8s.io/kubernetes/pkg/kubectl/scheme"
 )
 
@@ -55,8 +56,8 @@ func TestCreateConfigMap(t *testing.T) {
 		}),
 	}
 	tf.Namespace = "test"
-	buf := bytes.NewBuffer([]byte{})
-	cmd := NewCmdCreateConfigMap(tf, buf)
+	ioStreams, _, buf, _ := genericclioptions.NewTestIOStreams()
+	cmd := NewCmdCreateConfigMap(tf, ioStreams)
 	cmd.Flags().Set("output", "name")
 	cmd.Run(cmd, []string{configMap.Name})
 	expectedOutput := "configmap/" + configMap.Name + "\n"