clap/tests/subcommands.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;

#[derive(Clap, PartialEq, Debug)]
enum Opt {
    #[clap(name = "fetch", about = "Fetch stuff from GitHub.")]
    Fetch {
        #[clap(long = "all")]
        all: bool,
        #[clap(short = "f", long = "force")]
        /// Overwrite local branches.
        force: bool,
        repo: String,
    },

    #[clap(name = "add")]
    Add {
        #[clap(short = "i", long = "interactive")]
        interactive: bool,
        #[clap(short = "v", long = "verbose")]
        verbose: bool,
    },
}

#[test]
fn test_fetch() {
    assert_eq!(
        Opt::Fetch {
            all: true,
            force: false,
            repo: "origin".to_string()
        },
        Opt::parse_from(&["test", "fetch", "--all", "origin"])
    );
    assert_eq!(
        Opt::Fetch {
            all: false,
            force: true,
            repo: "origin".to_string()
        },
        Opt::parse_from(&["test", "fetch", "-f", "origin"])
    );
}

#[test]
fn test_add() {
    assert_eq!(
        Opt::Add {
            interactive: false,
            verbose: false
        },
        Opt::parse_from(&["test", "add"])
    );
    assert_eq!(
        Opt::Add {
            interactive: true,
            verbose: true
        },
        Opt::parse_from(&["test", "add", "-i", "-v"])
    );
}

#[test]
fn test_no_parse() {
    let result = Opt::try_parse_from(&["test", "badcmd", "-i", "-v"]);
    assert!(result.is_err());

    let result = Opt::try_parse_from(&["test", "add", "--badoption"]);
    assert!(result.is_err());

    let result = Opt::try_parse_from(&["test"]);
    assert!(result.is_err());
}

#[derive(Clap, PartialEq, Debug)]
enum Opt2 {
    #[clap(name = "do-something")]
    DoSomething { arg: String },
}

#[test]
/// This test is specifically to make sure that hyphenated subcommands get
/// processed correctly.
fn test_hyphenated_subcommands() {
    assert_eq!(
        Opt2::DoSomething {
            arg: "blah".to_string()
        },
        Opt2::parse_from(&["test", "do-something", "blah"])
    );
}

#[derive(Clap, PartialEq, Debug)]
enum Opt3 {
    #[clap(name = "add")]
    Add,
    #[clap(name = "init")]
    Init,
    #[clap(name = "fetch")]
    Fetch,
}

#[test]
fn test_null_commands() {
    assert_eq!(Opt3::Add, Opt3::parse_from(&["test", "add"]));
    assert_eq!(Opt3::Init, Opt3::parse_from(&["test", "init"]));
    assert_eq!(Opt3::Fetch, Opt3::parse_from(&["test", "fetch"]));
}

#[derive(Clap, PartialEq, Debug)]
#[clap(about = "Not shown")]
struct Add {
    file: String,
}
/// Not shown
#[derive(Clap, PartialEq, Debug)]
struct Fetch {
    remote: String,
}
#[derive(Clap, PartialEq, Debug)]
enum Opt4 {
    /// Not shown
    #[clap(name = "add", about = "Add a file")]
    Add(Add),
    #[clap(name = "init")]
    Init,
    /// download history from remote
    #[clap(name = "fetch")]
    Fetch(Fetch),
}

#[test]
fn test_tuple_commands() {
    use clap::IntoApp;

    assert_eq!(
        Opt4::Add(Add {
            file: "f".to_string()
        }),
        Opt4::parse_from(&["test", "add", "f"])
    );
    assert_eq!(Opt4::Init, Opt4::parse_from(&["test", "init"]));
    assert_eq!(
        Opt4::Fetch(Fetch {
            remote: "origin".to_string()
        }),
        Opt4::parse_from(&["test", "fetch", "origin"])
    );

    let mut output = Vec::new();
    Opt4::into_app().write_long_help(&mut output).unwrap();
    let output = String::from_utf8(output).unwrap();

    assert!(output.contains("download history from remote"));
    assert!(output.contains("Add a file"));
    assert!(!output.contains("Not shown"));
}

#[test]
fn enum_in_enum_subsubcommand() {
    #[derive(Clap, Debug, PartialEq)]
    pub enum Opt {
        #[clap(name = "daemon")]
        Daemon(DaemonCommand),
    }

    #[derive(Clap, Debug, PartialEq)]
    pub enum DaemonCommand {
        #[clap(name = "start")]
        Start,
        #[clap(name = "stop")]
        Stop,
    }

    let result = Opt::try_parse_from(&["test"]);
    assert!(result.is_err());

    let result = Opt::try_parse_from(&["test", "daemon"]);
    assert!(result.is_err());

    let result = Opt::parse_from(&["test", "daemon", "start"]);
    assert_eq!(Opt::Daemon(DaemonCommand::Start), result);
}

#[test]
fn flatten_enum() {
    #[derive(Clap, Debug, PartialEq)]
    struct Opt {
        #[clap(flatten)]
        sub_cmd: SubCmd,
    }
    #[derive(Clap, Debug, PartialEq)]
    enum SubCmd {
        Foo,
        Bar,
    }

    assert!(Opt::try_parse_from(&["test"]).is_err());
    assert_eq!(
        Opt::parse_from(&["test", "Foo"]),
        Opt {
            sub_cmd: SubCmd::Foo
        }
    );
}