} else {
			_, _ = fmt.Fprintf(writer, "%q is valid\n", fname)
		}
	}

	return nil
}

// NewValidateCommand creates a new command for validating Istio k8s resources.
func NewValidateCommand(ctx cli.Context) *cobra.Command {
	var filenames []string
	var referential bool

	c := &cobra.Command{
		Use:     "validate -f FILENAME [options]",

	rootCmd.AddCommand(collateral.CobraCommand(rootCmd, collateral.Metadata{
		Title:   "Istio Control",
		Section: "istioctl CLI",
		Manual:  "Istio Control",
	}))

	validateCmd := validate.NewValidateCommand(ctx)
	hideInheritedFlags(validateCmd, "kubeconfig")
	rootCmd.AddCommand(validateCmd)

	rootCmd.AddCommand(optionsCommand(rootCmd))

	// BFS applies the flag error function to all subcommands

	}
	for i, c := range cases {
		t.Run(fmt.Sprintf("[%v] %v", i, c.name), func(t *testing.T) {
			ctx := cli.NewFakeContext(&cli.NewFakeContextOption{
				IstioNamespace: "istio-system",
			})
			validateCmd := NewValidateCommand(ctx)
			validateCmd.SilenceUsage = true
			validateCmd.SetArgs(c.args)

			// capture output to keep test logs clean
			var out bytes.Buffer
			validateCmd.SetOut(&out)
			validateCmd.SetErr(&out)