clap/tests/flags.rs

// Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>,
// Kevin Knapp (@kbknapp) <kbknapp@gmail.com>, and
// Andrew Hobden (@hoverbear) <andrew@hoverbear.org>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//
// This work was derived from Structopt (https://github.com/TeXitoi/structopt)
// commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the
// MIT/Apache 2.0 license.

#[macro_use]
extern crate clap;

use clap::Clap;

#[test]
fn unique_flag() {
    #[derive(Clap, PartialEq, Debug)]
    struct Opt {
        #[clap(short = "a", long = "alice")]
        alice: bool,
    }

    assert_eq!(
        Opt { alice: false },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test"]))
    );
    assert_eq!(
        Opt { alice: true },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-a"]))
    );
    assert_eq!(
        Opt { alice: true },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "--alice"]))
    );
    assert!(
        Opt::into_app()
            .get_matches_from_safe(&["test", "-i"])
            .is_err()
    );
    assert!(
        Opt::into_app()
            .get_matches_from_safe(&["test", "-a", "foo"])
            .is_err()
    );
    assert!(
        Opt::into_app()
            .get_matches_from_safe(&["test", "-a", "-a"])
            .is_err()
    );
    assert!(
        Opt::into_app()
            .get_matches_from_safe(&["test", "-a", "--alice"])
            .is_err()
    );
}

#[test]
fn multiple_flag() {
    #[derive(Clap, PartialEq, Debug)]
    struct Opt {
        #[clap(short = "a", long = "alice", parse(from_occurrences))]
        alice: u64,
        #[clap(short = "b", long = "bob", parse(from_occurrences))]
        bob: u8,
    }

    assert_eq!(
        Opt { alice: 0, bob: 0 },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test"]))
    );
    assert_eq!(
        Opt { alice: 1, bob: 0 },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-a"]))
    );
    assert_eq!(
        Opt { alice: 2, bob: 0 },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-a", "-a"]))
    );
    assert_eq!(
        Opt { alice: 2, bob: 2 },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-a", "--alice", "-bb"]))
    );
    assert_eq!(
        Opt { alice: 3, bob: 1 },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-aaa", "--bob"]))
    );
    assert!(
        Opt::into_app()
            .get_matches_from_safe(&["test", "-i"])
            .is_err()
    );
    assert!(
        Opt::into_app()
            .get_matches_from_safe(&["test", "-a", "foo"])
            .is_err()
    );
}

#[test]
fn combined_flags() {
    #[derive(Clap, PartialEq, Debug)]
    struct Opt {
        #[clap(short = "a", long = "alice")]
        alice: bool,
        #[clap(short = "b", long = "bob", parse(from_occurrences))]
        bob: u64,
    }

    assert_eq!(
        Opt {
            alice: false,
            bob: 0
        },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test"]))
    );
    assert_eq!(
        Opt {
            alice: true,
            bob: 0
        },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-a"]))
    );
    assert_eq!(
        Opt {
            alice: true,
            bob: 0
        },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-a"]))
    );
    assert_eq!(
        Opt {
            alice: false,
            bob: 1
        },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-b"]))
    );
    assert_eq!(
        Opt {
            alice: true,
            bob: 1
        },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "--alice", "--bob"]))
    );
    assert_eq!(
        Opt {
            alice: true,
            bob: 4
        },
        Opt::from_argmatches(&Opt::into_app().get_matches_from(&["test", "-bb", "-a", "-bb"]))
    );
}