clap/tests/builder/flags.rs

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use crate::utils;
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use clap::{arg, Arg, Command};
const USE_FLAG_AS_ARGUMENT: &str =
"error: Found argument '--another-flag' which wasn't expected, or isn't valid in this context
\tIf you tried to supply `--another-flag` as a value rather than a flag, use `-- --another-flag`
USAGE:
mycat [OPTIONS] [filename]
For more information try --help
";
#[test]
fn flag_using_short() {
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let m = Command::new("flag")
.args(&[
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arg!(-f --flag "some flag"),
arg!(-c --color "some other flag"),
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])
.try_get_matches_from(vec!["", "-f", "-c"])
.unwrap();
assert!(m.is_present("flag"));
assert!(m.is_present("color"));
}
#[test]
fn lots_o_flags_sep() {
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let r = Command::new("opts")
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.arg(arg!(o: -o ... "some flag"))
.try_get_matches_from(vec![
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"", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o", "-o",
"-o", "-o", "-o",
]);
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assert!(r.is_ok(), "{:?}", r.unwrap_err().kind());
let m = r.unwrap();
assert!(m.is_present("o"));
assert_eq!(m.occurrences_of("o"), 297); // i.e. more than u8
}
#[test]
fn lots_o_flags_combined() {
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let r = Command::new("opts")
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.arg(arg!(o: -o ... "some flag"))
.try_get_matches_from(vec![
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"",
"-oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo",
"-oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo",
"-oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo",
"-oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo",
"-ooooooooooooooooooooooooooooooooooooooooo",
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]);
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assert!(r.is_ok(), "{:?}", r.unwrap_err().kind());
let m = r.unwrap();
assert!(m.is_present("o"));
assert_eq!(m.occurrences_of("o"), 297); // i.e. more than u8
}
#[test]
fn flag_using_long() {
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let m = Command::new("flag")
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.args(&[arg!(--flag "some flag"), arg!(--color "some other flag")])
.try_get_matches_from(vec!["", "--flag", "--color"])
.unwrap();
assert!(m.is_present("flag"));
assert!(m.is_present("color"));
}
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#[test]
fn flag_using_long_with_literals() {
use clap::error::ErrorKind;
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let m = Command::new("flag")
.arg(Arg::new("rainbow").long("rainbow"))
.try_get_matches_from(vec!["", "--rainbow=false"]);
assert!(m.is_err(), "{:#?}", m.unwrap());
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assert_eq!(m.unwrap_err().kind(), ErrorKind::TooManyValues);
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}
#[test]
fn flag_using_mixed() {
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let m = Command::new("flag")
.args(&[
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arg!(-f --flag "some flag"),
arg!(-c --color "some other flag"),
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])
.try_get_matches_from(vec!["", "-f", "--color"])
.unwrap();
assert!(m.is_present("flag"));
assert!(m.is_present("color"));
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let m = Command::new("flag")
.args(&[
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arg!(-f --flag "some flag"),
arg!(-c --color "some other flag"),
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])
.try_get_matches_from(vec!["", "--flag", "-c"])
.unwrap();
assert!(m.is_present("flag"));
assert!(m.is_present("color"));
}
#[test]
fn multiple_flags_in_single() {
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let m = Command::new("multe_flags")
.args(&[
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arg!(-f --flag "some flag"),
arg!(-c --color "some other flag"),
arg!(-d --debug "another other flag"),
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])
.try_get_matches_from(vec!["", "-fcd"])
.unwrap();
assert!(m.is_present("flag"));
assert!(m.is_present("color"));
assert!(m.is_present("debug"));
}
#[test]
fn issue_1284_argument_in_flag_style() {
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let cmd = Command::new("mycat")
.arg(Arg::new("filename"))
.arg(Arg::new("a-flag").long("a-flag"));
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let m = cmd
.clone()
.try_get_matches_from(vec!["", "--", "--another-flag"])
.unwrap();
assert_eq!(
m.get_one::<String>("filename").map(|v| v.as_str()),
Some("--another-flag")
);
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let m = cmd
.clone()
.try_get_matches_from(vec!["", "--a-flag"])
.unwrap();
assert!(m.is_present("a-flag"));
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let m = cmd
.clone()
.try_get_matches_from(vec!["", "--", "--a-flag"])
.unwrap();
assert_eq!(
m.get_one::<String>("filename").map(|v| v.as_str()),
Some("--a-flag")
);
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utils::assert_output(cmd, "mycat --another-flag", USE_FLAG_AS_ARGUMENT, true);
}
#[test]
fn issue_2308_multiple_dashes() {
static MULTIPLE_DASHES: &str =
"error: Found argument '-----' which wasn't expected, or isn't valid in this context
If you tried to supply `-----` as a value rather than a flag, use `-- -----`
USAGE:
test <arg>
For more information try --help
";
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let cmd = Command::new("test").arg(Arg::new("arg").takes_value(true).required(true));
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utils::assert_output(cmd, "test -----", MULTIPLE_DASHES, true);
}
#[test]
#[cfg(not(feature = "unstable-v4"))]
fn leading_dash_stripped() {
let cmd = Command::new("mycat").arg(Arg::new("filename").long("--filename"));
let matches = cmd.try_get_matches_from(["mycat", "--filename"]).unwrap();
assert!(matches.is_present("filename"));
}
#[test]
#[cfg(feature = "unstable-v4")]
#[cfg(debug_assertions)]
#[should_panic = "Argument filename: long \"--filename\" must not start with a `-`, that will be handled by the parser"]
fn leading_dash_stripped() {
let cmd = Command::new("mycat").arg(Arg::new("filename").long("--filename"));
cmd.debug_assert();
}