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: godot_version.rs
    path of file: ./repos/gdnative/bindings-generator/src
    
    the code of the file until where you have to start completion: //#![allow(unused_variables, dead_code)]

use regex::Regex;
use std::error::Error;

pub struct GodotVersion {
    pub major: u8,
    pub minor: u8,
    pub patch: u8,         //< 0 if none
    pub stability: Str
    
fn test_godot_versions() {
    let good_versions = [
        ("3.0.stable.official", 3, 0, 0, "stable"),
        ("3.0.1.stable.official", 3, 0, 1, "stable"),
        ("3.2.stable.official", 3, 2, 0, "stable"),
        ("3.37.stable.official", 3, 37, 0, "stable"),
        ("3.4.stable.official.206ba70f4", 3, 4, 0, "stable"),
        ("3.4.1.stable.official.aa1b95889", 3, 4, 1, "stable"),
        ("3.5.beta.custom_build.837f2c5f8", 3, 5, 0, "beta"),
        ("4.0.dev.custom_build.e7e9e663b", 4, 0, 0, "dev"),
    ];

    let bad_versions = [
        "4.0.unstable.custom_build.e7e9e663b", // "unstable"
        "4.0.3.custom_build.e7e9e663b",        // no stability
        "3.stable.official.206ba70f4",         // no minor
    ];

    // From Rust 1.56: 'for (...) in good_versions'
    for (full, major, minor, patch, stability) in good_versions {
        let parsed: GodotVersion = parse_godot_version(full).unwrap();
        assert_eq!(parsed.major, major);
        assert_eq!(parsed.minor, minor);
        assert_eq!(parsed.patch, patch);
        assert_eq!(parsed.stability, stability);
    }

    for full in bad_versions {
        let parsed = parse_godot_version(full);
        assert!(parsed.is_err());
    }
}