}
	_ = parent.PersistentFlags().String(childFlag2, "", childFlag2)
	parent.AddCommand(child)

	// verify both parent flags and the child flag are visible by default
	parent.SetArgs([]string{"child", "--help"})
	if err := parent.Execute(); err != nil {
		t.Fatal(err)
	}
	got := out.String()
	out.Reset()
	checkHelpForFlag(t, got, parentFlag0, true)
	checkHelpForFlag(t, got, parentFlag1, true)

	GoldenFilename string         // Expected output stored in golden file

	WantException bool
}

func VerifyOutput(t *testing.T, cmd *cobra.Command, c TestCase) {
	t.Helper()

	cmd.SetArgs(c.Args)

	var out bytes.Buffer
	cmd.SetOut(&out)
	cmd.SetErr(&out)
	cmd.SilenceUsage = true

	fErr := cmd.Execute()
	output := out.String()

	if c.ExpectedOutput != "" && c.ExpectedOutput != output {

            builder.getMainModule().set("jdk.httpserver");
            builder.setStandardOutput(System.out);
            builder.setErrorOutput(System.err);
            builder.setArgs(Arrays.asList("-p", getPort().get(), "-d", getDocsDirectory().get().getAsFile().getAbsolutePath()));
            registry.start(getPath(), DeploymentRegistry.ChangeBehavior.RESTART, JavaApplicationHandle.class, builder);
        }

func RunSubCommand(t *testing.T, subCmds []*cobra.Command, command string, output io.Writer, args ...string) error {
	subCmd := getSubCommand(t, subCmds, command)
	subCmd.SetOut(output)
	subCmd.SetArgs(args)
	if err := subCmd.Execute(); err != nil {
		return err
	}
	return nil
}

func getSubCommand(t *testing.T, subCmds []*cobra.Command, name string) *cobra.Command {
	for _, subCmd := range subCmds {

            builder.setExecutable(Jvm.current().getJavaExecutable());
            builder.setClasspath(classpath);
            builder.getMainClass().set(mainClassName);
            builder.setArgs(arguments);
            registry.start(getPath(), changeBehavior, JavaApplicationHandle.class, builder);
        }
    }

    @Inject
    protected DeploymentRegistry getDeploymentRegistry() {

				Namespace: "default",
			})), c)
		})
	}
}

func verifyExecTestOutput(t *testing.T, cmd *cobra.Command, c execTestCase) {
	t.Helper()

	var out bytes.Buffer
	cmd.SetArgs(c.args)
	cmd.SilenceUsage = true
	cmd.SetOut(&out)
	cmd.SetErr(&out)

	fErr := cmd.Execute()
	output := out.String()

	if c.expectedOutput != "" && c.expectedOutput != output {

				t.Fatal(err)
			}
			expectedOut := string(defaultFile)
			if len(expectedOut) == 0 {
				t.Fatal("expected output is empty")
			}

			var out bytes.Buffer
			rootCmd := Cmd(ctx)
			rootCmd.SetArgs(tt.args)
			rootCmd.SetOut(&out)
			rootCmd.SetErr(&out)

			fErr := rootCmd.Execute()
			if fErr != nil {
				t.Fatal(fErr)
			}
			output := out.String()
			if output != expectedOut {

        LOG.info("Invoking {} with arguments: {}", executable, arguments);
        execOperations.exec(spec -> {
                spec.setExecutable(executable);
                spec.setArgs(arguments);
                spec.setStandardInput(prepareStdin(input));
                spec.setStandardOutput(output);
            }
        );
    }

    private InputStream prepareStdin(InputStream input) {

		Short:        "Command line Istio install utility.",
		SilenceUsage: true,
		Long: "This command uses the Istio operator code to generate templates, query configurations and perform " +
			"utility operations.",
	}
	rootCmd.SetArgs(args)
	rootCmd.PersistentFlags().AddGoFlagSet(flag.CommandLine)

	rootCmd.AddCommand(ManifestCmd(ctx))
	rootCmd.AddCommand(InstallCmd(ctx))
	rootCmd.AddCommand(ProfileCmd(ctx))
	rootCmd.AddCommand(OperatorCmd(ctx))

            -J*) addJava "${1:2}" && shift ;;
              *) addResidual "$1" && shift ;;
    esac
  done

  is_function_defined process_my_args && {
    myargs=("${residual_args[@]}")
    residual_args=()
    process_my_args "${myargs[@]}"
  }
}

# Actually runs the script.
run() {
  # TODO - check for sane environment

  # process the combined args, then reset "$@" to the residuals