mirror of
https://github.com/clap-rs/clap
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78aa86cfbb
It turns out `value_name` appends, so by setting an implicit and explicit `value_name`, the user gets both and `num_vals=2`. There is still a question on `value_name` and whether its documentation or behavior needs updating. If that changes, then this can be simplified by reverting back. Fixes #2632
120 lines
3.5 KiB
Rust
120 lines
3.5 KiB
Rust
// Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>,
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// Kevin Knapp (@kbknapp) <kbknapp@gmail.com>, and
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// Andrew Hobden (@hoverbear) <andrew@hoverbear.org>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//
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// This work was derived from Structopt (https://github.com/TeXitoi/structopt)
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// commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the
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// MIT/Apache 2.0 license.
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use clap::Clap;
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use clap::IntoApp;
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#[test]
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fn required_argument() {
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#[derive(Clap, PartialEq, Debug)]
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struct Opt {
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arg: i32,
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}
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assert_eq!(Opt { arg: 42 }, Opt::parse_from(&["test", "42"]));
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assert!(Opt::try_parse_from(&["test"]).is_err());
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assert!(Opt::try_parse_from(&["test", "42", "24"]).is_err());
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}
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#[test]
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fn optional_argument() {
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#[derive(Clap, PartialEq, Debug)]
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struct Opt {
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arg: Option<i32>,
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}
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assert_eq!(Opt { arg: Some(42) }, Opt::parse_from(&["test", "42"]));
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assert_eq!(Opt { arg: None }, Opt::parse_from(&["test"]));
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assert!(Opt::try_parse_from(&["test", "42", "24"]).is_err());
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}
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#[test]
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fn argument_with_default() {
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#[derive(Clap, PartialEq, Debug)]
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struct Opt {
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#[clap(default_value = "42")]
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arg: i32,
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}
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assert_eq!(Opt { arg: 24 }, Opt::parse_from(&["test", "24"]));
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assert_eq!(Opt { arg: 42 }, Opt::parse_from(&["test"]));
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assert!(Opt::try_parse_from(&["test", "42", "24"]).is_err());
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}
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#[test]
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fn arguments() {
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#[derive(Clap, PartialEq, Debug)]
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struct Opt {
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arg: Vec<i32>,
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}
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assert_eq!(Opt { arg: vec![24] }, Opt::parse_from(&["test", "24"]));
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assert_eq!(Opt { arg: vec![] }, Opt::parse_from(&["test"]));
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assert_eq!(
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Opt { arg: vec![24, 42] },
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Opt::parse_from(&["test", "24", "42"])
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);
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}
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#[test]
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fn arguments_safe() {
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#[derive(Clap, PartialEq, Debug)]
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struct Opt {
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arg: Vec<i32>,
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}
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assert_eq!(
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Opt { arg: vec![24] },
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Opt::try_parse_from(&["test", "24"]).unwrap()
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);
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assert_eq!(Opt { arg: vec![] }, Opt::try_parse_from(&["test"]).unwrap());
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assert_eq!(
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Opt { arg: vec![24, 42] },
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Opt::try_parse_from(&["test", "24", "42"]).unwrap()
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);
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assert_eq!(
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clap::ErrorKind::ValueValidation,
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Opt::try_parse_from(&["test", "NOPE"]).err().unwrap().kind
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);
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}
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#[test]
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fn auto_value_name() {
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#[derive(Clap, PartialEq, Debug)]
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struct Opt {
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my_special_arg: i32,
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}
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let mut help = Vec::new();
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Opt::into_app().write_help(&mut help).unwrap();
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let help = String::from_utf8(help).unwrap();
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assert!(help.contains("MY_SPECIAL_ARG"));
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// Ensure the implicit `num_vals` is just 1
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assert_eq!(Opt { my_special_arg: 10 }, Opt::parse_from(&["test", "10"]));
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}
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#[test]
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fn explicit_value_name() {
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#[derive(Clap, PartialEq, Debug)]
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struct Opt {
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#[clap(value_name = "BROWNIE_POINTS")]
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my_special_arg: i32,
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}
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let mut help = Vec::new();
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Opt::into_app().write_help(&mut help).unwrap();
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let help = String::from_utf8(help).unwrap();
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assert!(help.contains("BROWNIE_POINTS"));
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assert!(!help.contains("MY_SPECIAL_ARG"));
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// Ensure the implicit `num_vals` is just 1
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assert_eq!(Opt { my_special_arg: 10 }, Opt::parse_from(&["test", "10"]));
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}
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