clap/tests/help.rs

117 lines
3.1 KiB
Rust
Raw Normal View History

extern crate clap;
use clap::{App, SubCommand, ErrorKind, Arg};
#[test]
fn help_short() {
let m = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.get_matches_from_safe(vec!["myprog", "-h"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind, ErrorKind::HelpDisplayed);
}
#[test]
fn help_long() {
let m = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.get_matches_from_safe(vec!["myprog", "--help"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind, ErrorKind::HelpDisplayed);
}
#[test]
fn help_no_subcommand() {
let m = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.get_matches_from_safe(vec!["myprog", "help"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind, ErrorKind::UnknownArgument);
}
#[test]
fn help_subcommand() {
let m = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.subcommand(SubCommand::with_name("test")
.about("tests things")
.arg_from_usage("-v --verbose 'with verbosity'"))
.get_matches_from_safe(vec!["myprog", "help"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind, ErrorKind::HelpDisplayed);
}
#[test]
fn print_app_help() {
let mut app = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.args_from_usage("-f, --flag 'some flag'
--option [opt] 'some option'");
// We call a get_matches method to cause --help and --version to be built
let _ = app.get_matches_from_safe_borrow(vec![""]);
// Now we check the output of print_help()
let mut help = vec![];
app.write_help(&mut help).ok().expect("failed to print help");
assert_eq!(&*String::from_utf8_lossy(&*help), &*String::from("test 1.3\n\
Kevin K.
tests stuff
USAGE:
\ttest [FLAGS] [OPTIONS]
FLAGS:
-f, --flag some flag
-h, --help Prints help information
-V, --version Prints version information
OPTIONS:
--option <opt> some option\n"));
}
#[test]
fn possible_values() {
let mut app = App::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.args(&[Arg::from_usage("-o, --opt [opt] 'some option'").possible_values(&["one", "two"]),
Arg::from_usage("[arg1] 'some pos arg'").possible_values(&["three", "four"])]);
// We call a get_matches method to cause --help and --version to be built
let _ = app.get_matches_from_safe_borrow(vec![""]);
// Now we check the output of print_help()
let mut help = vec![];
app.write_help(&mut help).expect("failed to print help");
assert_eq!(&*String::from_utf8_lossy(&*help), &*String::from("test 1.3\n\
Kevin K.
tests stuff
USAGE:
\ttest [FLAGS] [OPTIONS] [ARGS]
FLAGS:
-h, --help Prints help information
-V, --version Prints version information
OPTIONS:
-o, --opt <opt> some option [values: one, two]
ARGS:
arg1 some pos arg [values: three, four]\n"));
}