}

    def createsAndExecutesCommandLineAction() {
        given:
        action {}

        when:
        main.run()

        then:
        completedSuccessfully
    }

    def reportsActionExecutionFailure() {
        given:
        def thrownFailure = new RuntimeException('broken')
        action { throw thrownFailure }

        when:
        main.run()

        then: