table := &metav1.Table{
			ColumnDefinitions: test.columns,
			Rows:              test.rows,
		}
		// Print the table
		out := bytes.NewBuffer([]byte{})
		printer := NewTablePrinter(test.options)
		printer.PrintObj(table, out)

		// Validate the printed table is empty.
		if len(out.String()) > 0 {
			t.Errorf("Error Printing Table. Should be empty; got (%s)", out.String())
		}
	}
}

	cfg *kubeadmapi.InitConfiguration
}

// imageTextPrinter prints image info in a text form
type imageTextPrinter struct {
	output.TextPrinter
}

// PrintObj is an implementation of ResourcePrinter.PrintObj for plain text output
func (itp *imageTextPrinter) PrintObj(obj runtime.Object, writer io.Writer) error {
	var err error
	if imgs, ok := obj.(*outputapiv1alpha3.Images); ok {

}

// upgradePlanTextPrinter prints upgrade plan in a text form
type upgradePlanTextPrinter struct {
	output.TextPrinter
}

// PrintObj is an implementation of ResourcePrinter.PrintObj for upgrade plan plain text output
func (printer *upgradePlanTextPrinter) PrintObj(obj runtime.Object, writer io.Writer) error {
	plan, ok := obj.(*outputapiv1alpha3.UpgradePlan)
	if !ok {

type tokenTextPrinter struct {
	output.TextPrinter
	columns         []string
	headerIsPrinted bool
}

// PrintObj is an implementation of ResourcePrinter.PrintObj for plain text output
func (ttp *tokenTextPrinter) PrintObj(obj runtime.Object, writer io.Writer) error {
	tabw := tabwriter.NewWriter(writer, 10, 4, 3, ' ', 0)

	// Print header
	if !ttp.headerIsPrinted {

func NewTablePrinter(options PrintOptions) ResourcePrinter {
	printer := &HumanReadablePrinter{
		options: options,
	}
	return printer
}

func printHeader(columnNames []string, w io.Writer) error {
	if _, err := fmt.Fprintf(w, "%s\n", strings.Join(columnNames, "\t")); err != nil {
		return err
	}
	return nil
}

}

// certsTextPrinter prints all certificates in a text form
type certTextPrinter struct {
	output.TextPrinter
}

// PrintObj is an implementation of ResourcePrinter.PrintObj for plain text output
func (p *certTextPrinter) PrintObj(obj runtime.Object, writer io.Writer) error {
	info, ok := obj.(*outputapiv1alpha3.CertificateExpirationInfo)
	if !ok {
		return errors.New("unexpected type")
	}

			printer, err := outputFlags.ToPrinter()
			if err != nil {
				t.Errorf("failed ToPrinter, err: %+v", err)
			}

			plan := genUpgradePlan(rt.upgrades, rt.versionStates)
			if err := printer.PrintObj(plan, rt.buf); err != nil {
				t.Errorf("unexpected error when print object: %v", err)
			}

			actualBytes := rt.buf.Bytes()
			if !bytes.Equal(actualBytes, rt.expectedBytes) {
				t.Errorf(

			printer, err := outputFlags.ToPrinter()
			if err != nil {
				t.Errorf("can't create printer for output format %s: %+v", tc.outputFormat, err)
			}

			if err := printer.PrintObj(&token, &buf); err != nil {
				t.Errorf("unable to print token %s: %+v", token.Token, err)
			}

			actual := buf.String()
			if actual != tc.expected {
				t.Errorf(