extern crate clap; use clap::{App, ArgGroup, ClapErrorType}; #[test] fn required_group_missing_arg() { let result = App::new("group") .args_from_usage("-f, --flag 'some flag' -c, --color 'some other flag'") .arg_group(ArgGroup::with_name("req") .add_all(&["flag", "color"]) .required(true)) .get_matches_from_safe(vec![""]); assert!(result.is_err()); let err = result.err().unwrap(); assert_eq!(err.error_type, ClapErrorType::MissingRequiredArgument); } #[test] fn group_single_value() { let m = App::new("group") .args_from_usage("-f, --flag 'some flag' -c, --color [color] 'some option'") .arg_group(ArgGroup::with_name("grp") .add_all(&["flag", "color"])) .get_matches_from(vec!["", "-c", "blue"]); assert!(m.is_present("grp")); assert_eq!(m.value_of("grp").unwrap(), "blue"); } #[test] fn group_single_flag() { let m = App::new("group") .args_from_usage("-f, --flag 'some flag' -c, --color [color] 'some option'") .arg_group(ArgGroup::with_name("grp") .add_all(&["flag", "color"])) .get_matches_from(vec!["", "-f"]); assert!(m.is_present("grp")); assert!(m.value_of("grp").is_none()); } #[test] fn group_empty() { let m = App::new("group") .args_from_usage("-f, --flag 'some flag' -c, --color [color] 'some option'") .arg_group(ArgGroup::with_name("grp") .add_all(&["flag", "color"])) .get_matches_from(vec![""]); assert!(!m.is_present("grp")); assert!(m.value_of("grp").is_none()); } #[test] fn group_reqired_flags_empty() { let result = App::new("group") .args_from_usage("-f, --flag 'some flag' -c, --color 'some option'") .arg_group(ArgGroup::with_name("grp") .required(true) .add_all(&["flag", "color"])) .get_matches_from_safe(vec![""]); assert!(result.is_err()); let err = result.err().unwrap(); assert_eq!(err.error_type, ClapErrorType::MissingRequiredArgument); } #[test] fn group_multi_value_single_arg() { let m = App::new("group") .args_from_usage("-f, --flag 'some flag' -c, --color [color]... 'some option'") .arg_group(ArgGroup::with_name("grp") .add_all(&["flag", "color"])) .get_matches_from(vec!["", "-c", "blue", "red", "green"]); assert!(m.is_present("grp")); assert_eq!(m.values_of("grp").unwrap(), &["blue", "red", "green"]); }