You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: error.rs
    path of file: ./repos/conwayste/conwayste/src
    
    the code of the file until where you have to start completion: /*  Copyright 2019 the Conwayste Developers.
 *
 *  This file is part of Conwayste.
 *
 *  Conwayste is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 
    
    fn test_handle_error_unexpected_with_default() {
        let a_result = give_me_an_unexpected_result();
        let mut super_x = None;
        let mut sidekick_arm_executed = false;
        let mut default_arm_executed = false;
        let res = handle_error!(a_result,
            SuperError => |e| {
                super_x = Some(e.x);
            },
            SuperSideKickError => |_e| {
                sidekick_arm_executed = true;
            },
            else => |_e| {
                default_arm_executed = true;
            }
        );
        assert_eq!(res.unwrap(), ()); // error should have been handled, and in fact would always be handled because of else
        assert_eq!(super_x, None);
        assert_eq!(sidekick_arm_executed, false);
        assert_eq!(default_arm_executed, true);
    }