mirror of
https://github.com/clap-rs/clap
synced 2024-12-16 07:42:32 +00:00
d840d5650e
Before #2005, `Clap` was a special trait that derived all clap traits it detected were relevant (including an enum getting both `ArgEnum`, `Clap`, and `Subcommand`). Now, we have elevated `Clap`, `Args`, `Subcommand`, and `ArgEnum` to be user facing but the name `Clap` isn't very descriptive. This also helps further clarify the relationships so a crate providing an item to be `#[clap(flatten)]` or `#[clap(subcommand)]` is more likely to choose the needed trait to derive. Also, my proposed fix fo #2785 includes making `App` attributes almost exclusively for `Clap`. Clarifying the names/roles will help communicate this. For prior discussion, see #2583
47 lines
1.1 KiB
Rust
47 lines
1.1 KiB
Rust
use clap::Parser;
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mod utils;
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use utils::*;
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#[test]
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fn default_value() {
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#[derive(Parser, PartialEq, Debug)]
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struct Opt {
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#[clap(default_value = "3")]
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arg: i32,
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}
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assert_eq!(Opt { arg: 3 }, Opt::parse_from(&["test"]));
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assert_eq!(Opt { arg: 1 }, Opt::parse_from(&["test", "1"]));
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let help = get_long_help::<Opt>();
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assert!(help.contains("[default: 3]"));
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}
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#[test]
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fn default_value_t() {
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#[derive(Parser, PartialEq, Debug)]
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struct Opt {
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#[clap(default_value_t = 3)]
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arg: i32,
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}
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assert_eq!(Opt { arg: 3 }, Opt::parse_from(&["test"]));
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assert_eq!(Opt { arg: 1 }, Opt::parse_from(&["test", "1"]));
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let help = get_long_help::<Opt>();
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assert!(help.contains("[default: 3]"));
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}
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#[test]
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fn auto_default_value_t() {
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#[derive(Parser, PartialEq, Debug)]
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struct Opt {
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#[clap(default_value_t)]
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arg: i32,
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}
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assert_eq!(Opt { arg: 0 }, Opt::parse_from(&["test"]));
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assert_eq!(Opt { arg: 1 }, Opt::parse_from(&["test", "1"]));
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let help = get_long_help::<Opt>();
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assert!(help.contains("[default: 0]"));
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}
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