clap/tests/version.rs

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Rust
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mod utils;
use std::str;
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use clap::{App, AppSettings, ErrorKind};
static VERSION: &str = "clap-test v1.4.8";
#[test]
fn version_short() {
let m = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.try_get_matches_from(vec!["myprog", "-V"]);
assert!(m.is_err());
let err = m.unwrap_err();
assert_eq!(err.kind, ErrorKind::VersionDisplayed);
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assert_eq!(err.to_string(), "test 1.3");
}
#[test]
fn version_long() {
let m = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.try_get_matches_from(vec!["myprog", "--version"]);
assert!(m.is_err());
let err = m.unwrap_err();
assert_eq!(err.kind, ErrorKind::VersionDisplayed);
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assert_eq!(err.to_string(), "test 1.3");
}
#[test]
fn complex_version_output() {
let mut a = App::new("clap-test").version("v1.4.8");
let _ = a.try_get_matches_from_mut(vec![""]);
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// Now we check the output of print_version()
let mut ver = vec![];
a.write_version(&mut ver).unwrap();
assert_eq!(str::from_utf8(&ver).unwrap(), VERSION);
}
#[test]
fn override_ver() {
let m = App::new("test")
.setting(AppSettings::NoAutoVersion)
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
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.mut_arg("version", |a| {
a.short('v').long("version").help("some version")
})
.try_get_matches_from(vec!["test", "--version"]);
assert!(m.is_ok(), "{:?}", m.unwrap_err().kind);
assert!(m.unwrap().is_present("version"));
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}