use clap::{App, AppSettings, Arg};

#[test]
fn single_short_arg_without_value() {
    let app = App::new("app")
        .setting(AppSettings::IgnoreErrors)
        .arg("-c, --config=[FILE] 'Sets a custom config file'");

    let r = app.try_get_matches_from(vec!["app", "-c" /* missing: , "config file" */]);

    assert!(r.is_ok(), "unexpected error: {:?}", r);
    let m = r.unwrap();
    assert!(m.is_present("config"));
}

#[test]
fn single_long_arg_without_value() {
    let app = App::new("app")
        .setting(AppSettings::IgnoreErrors)
        .arg("-c, --config=[FILE] 'Sets a custom config file'");

    let r = app.try_get_matches_from(vec!["app", "--config" /* missing: , "config file" */]);

    assert!(r.is_ok(), "unexpected error: {:?}", r);
    let m = r.unwrap();
    assert!(m.is_present("config"));
}

#[test]
fn multiple_args_and_final_arg_without_value() {
    let app = App::new("app")
        .setting(AppSettings::IgnoreErrors)
        .arg("-c, --config=[FILE] 'Sets a custom config file'")
        .arg("-x, --stuff=[FILE] 'Sets a custom stuff file'")
        .arg("-f 'Flag'");

    let r = app.try_get_matches_from(vec![
        "app", "-c", "file", "-f", "-x", /* missing: , "some stuff" */
    ]);

    assert!(r.is_ok(), "unexpected error: {:?}", r);
    let m = r.unwrap();
    assert_eq!(m.value_of("config"), Some("file"));
    assert!(m.is_present("f"));
    assert_eq!(m.value_of("stuff"), None);
}

#[test]
fn multiple_args_and_intermittent_arg_without_value() {
    let app = App::new("app")
        .setting(AppSettings::IgnoreErrors)
        .arg("-c, --config=[FILE] 'Sets a custom config file'")
        .arg("-x, --stuff=[FILE] 'Sets a custom stuff file'")
        .arg("-f 'Flag'");

    let r = app.try_get_matches_from(vec![
        "app", "-x", /* missing: ,"some stuff" */
        "-c", "file", "-f",
    ]);

    assert!(r.is_ok(), "unexpected error: {:?}", r);
    let m = r.unwrap();
    assert_eq!(m.value_of("config"), Some("file"));
    assert!(m.is_present("f"));
    assert_eq!(m.value_of("stuff"), None);
}

#[test]
fn subcommand() {
    let app = App::new("test")
        .setting(AppSettings::IgnoreErrors)
        .subcommand(
            App::new("some")
                .arg(
                    Arg::new("test")
                        .short('t')
                        .long("test")
                        .takes_value(true)
                        .about("testing testing"),
                )
                .arg(
                    Arg::new("stuff")
                        .short('x')
                        .long("stuff")
                        .takes_value(true)
                        .about("stuf value"),
                ),
        )
        .arg(Arg::new("other").long("other"));

    let m = app.get_matches_from(vec![
        "myprog",
        "some",
        "--test", /* missing: ,"some val" */
        "-x",
        "some other val",
    ]);

    assert_eq!(m.subcommand_name().unwrap(), "some");
    let sub_m = m.subcommand_matches("some").unwrap();
    assert!(
        sub_m.is_present("test"),
        "expected subcommand to be present due to partial parsing"
    );
    assert_eq!(sub_m.value_of("test"), None);
    assert_eq!(sub_m.value_of("stuff"), Some("some other val"));
}