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clap/tests/builder/help.rs
Ed Page 02d27b5ce3 fix(usage): Make dont_collapse_args_in_usage the default 
The setting was added to resolve #769.  The reason it was optional is out
of concern for applications with a lot of positional arguments.  I think
those cases are rare enough that we should just push people to override
the usage.  Positional arguments are generally important enough, even if
optional, to show.

As a side effect, this fixed some bugs with
`dont_collapse_args_in_usage` where it would repeat an argument in a
smart usage.

As a side effect, smart usage now shows `--` when it should
2022-08-30 16:12:49 -05:00

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use super::utils;
use clap::{arg, builder::PossibleValue, error::ErrorKind, Arg, ArgAction, ArgGroup, Command};
fn setup() -> Command {
Command::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
}
fn empty_args() -> impl IntoIterator<Item = String> {
std::iter::empty()
}
#[test]
fn help_short() {
let m = setup().try_get_matches_from(vec!["myprog", "-h"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind(), ErrorKind::DisplayHelp);
}
#[test]
fn help_long() {
let m = setup().try_get_matches_from(vec!["myprog", "--help"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind(), ErrorKind::DisplayHelp);
}
#[test]
fn help_no_subcommand() {
let m = setup().try_get_matches_from(vec!["myprog", "help"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind(), ErrorKind::UnknownArgument);
}
#[test]
fn help_subcommand() {
let m = setup()
.subcommand(
Command::new("test")
.about("tests things")
.arg(arg!(-v --verbose "with verbosity")),
)
.try_get_matches_from(vec!["myprog", "help"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind(), ErrorKind::DisplayHelp);
}
#[test]
fn help_multi_subcommand_error() {
let cmd = Command::new("ctest").subcommand(
Command::new("subcmd").subcommand(
Command::new("multi")
.about("tests subcommands")
.author("Kevin K. <kbknapp@gmail.com>")
.version("0.1")
.arg(arg!(
-f --flag "tests flags"
))
.arg(
arg!(
-o --option <scoption> "tests options"
)
.required(false)
.num_args(1..)
.action(ArgAction::Append),
),
),
);
let err = cmd
.try_get_matches_from(["ctest", "help", "subcmd", "multi", "foo"])
.unwrap_err();
static EXPECTED: &str = "error: The subcommand 'foo' wasn't recognized
Usage:
ctest subcmd multi [OPTIONS]
For more information try --help
";
utils::assert_eq(EXPECTED, err.to_string());
}
#[test]
fn req_last_arg_usage() {
static LAST_ARG_REQ_MULT: &str = "example 1.0
Usage:
example <FIRST>... -- <SECOND>...
Arguments:
<FIRST>... First
<SECOND>... Second
Options:
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("example")
.version("1.0")
.arg(Arg::new("FIRST").help("First").num_args(1..).required(true))
.arg(
Arg::new("SECOND")
.help("Second")
.num_args(1..)
.required(true)
.last(true),
);
utils::assert_output(cmd, "example --help", LAST_ARG_REQ_MULT, false);
}
#[test]
fn args_with_last_usage() {
static LAST_ARG_USAGE: &str = "flamegraph 0.1
Usage:
flamegraph [OPTIONS] [BINFILE] [-- <ARGS>...]
Arguments:
[BINFILE] The path of the binary to be profiled. for a binary.
[ARGS]... Any arguments you wish to pass to the being profiled.
Options:
-v, --verbose Prints out more stuff.
-t, --timeout <SECONDS> Timeout in seconds.
-f, --frequency <HERTZ> The sampling frequency.
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("flamegraph")
.version("0.1")
.trailing_var_arg(true)
.arg(
Arg::new("verbose")
.help("Prints out more stuff.")
.short('v')
.long("verbose")
.action(ArgAction::SetTrue),
)
.arg(
Arg::new("timeout")
.help("Timeout in seconds.")
.short('t')
.long("timeout")
.value_name("SECONDS"),
)
.arg(
Arg::new("frequency")
.help("The sampling frequency.")
.short('f')
.long("frequency")
.value_name("HERTZ"),
)
.arg(
Arg::new("binary path")
.help("The path of the binary to be profiled. for a binary.")
.value_name("BINFILE"),
)
.arg(
Arg::new("pass through args")
.help("Any arguments you wish to pass to the being profiled.")
.action(ArgAction::Set)
.num_args(1..)
.last(true)
.value_name("ARGS"),
);
utils::assert_output(cmd, "flamegraph --help", LAST_ARG_USAGE, false);
}
#[test]
fn subcommand_short_help() {
let m = utils::complex_app().try_get_matches_from(vec!["clap-test", "subcmd", "-h"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind(), ErrorKind::DisplayHelp);
}
#[test]
fn subcommand_long_help() {
let m = utils::complex_app().try_get_matches_from(vec!["clap-test", "subcmd", "--help"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind(), ErrorKind::DisplayHelp);
}
#[test]
fn subcommand_help_rev() {
let m = utils::complex_app().try_get_matches_from(vec!["clap-test", "help", "subcmd"]);
assert!(m.is_err());
assert_eq!(m.unwrap_err().kind(), ErrorKind::DisplayHelp);
}
#[test]
fn complex_help_output() {
static HELP: &str = "clap-test v1.4.8
Kevin K. <kbknapp@gmail.com>
tests clap library
Usage:
clap-test [OPTIONS] [positional] [positional2] [positional3]... [SUBCOMMAND]
Subcommands:
subcmd tests subcommands
help Print this message or the help of the given subcommand(s)
Arguments:
[positional] tests positionals
[positional2] tests positionals with exclusions
[positional3]... tests specific values [possible values: vi, emacs]
Options:
-o, --option <opt>... tests options
-f, --flag... tests flags
-F tests flags with exclusions
--long-option-2 <option2> tests long options with exclusions
-O, --option3 <option3> specific vals [possible values: fast, slow]
--multvals <one> <two> Tests multiple values, not mult occs
--multvalsmo <one> <two> Tests multiple values, and mult occs
--minvals2 <minvals> <minvals>... Tests 2 min vals
--maxvals3 <maxvals>... Tests 3 max vals
--optvaleq[=<optval>] Tests optional value, require = sign
--optvalnoeq [<optval>] Tests optional value
-h, --help Print help information
-V, --version Print version information
";
utils::assert_output(utils::complex_app(), "clap-test --help", HELP, false);
}
#[test]
fn after_and_before_help_output() {
static AFTER_HELP: &str = "some text that comes before the help
clap-test v1.4.8
tests clap library
Usage:
clap-test
Options:
-h, --help Print help information
-V, --version Print version information
some text that comes after the help
";
let cmd = Command::new("clap-test")
.version("v1.4.8")
.about("tests clap library")
.before_help("some text that comes before the help")
.after_help("some text that comes after the help");
utils::assert_output(cmd.clone(), "clap-test -h", AFTER_HELP, false);
utils::assert_output(cmd, "clap-test --help", AFTER_HELP, false);
}
#[test]
fn after_and_before_long_help_output() {
static AFTER_HELP: &str = "some text that comes before the help
clap-test v1.4.8
tests clap library
Usage:
clap-test
Options:
-h, --help Print help information
-V, --version Print version information
some text that comes after the help
";
static AFTER_LONG_HELP: &str = "some longer text that comes before the help
clap-test v1.4.8
tests clap library
Usage:
clap-test
Options:
-h, --help
Print help information
-V, --version
Print version information
some longer text that comes after the help
";
let cmd = Command::new("clap-test")
.version("v1.4.8")
.about("tests clap library")
.before_help("some text that comes before the help")
.after_help("some text that comes after the help")
.before_long_help("some longer text that comes before the help")
.after_long_help("some longer text that comes after the help");
utils::assert_output(cmd.clone(), "clap-test --help", AFTER_LONG_HELP, false);
utils::assert_output(cmd, "clap-test -h", AFTER_HELP, false);
}
static MULTI_SC_HELP: &str = "ctest-subcmd-multi 0.1
Kevin K. <kbknapp@gmail.com>
tests subcommands
Usage:
ctest subcmd multi [OPTIONS]
Options:
-f, --flag tests flags
-o, --option <scoption>... tests options
-h, --help Print help information
-V, --version Print version information
";
#[test]
fn multi_level_sc_help() {
let cmd = Command::new("ctest").subcommand(
Command::new("subcmd").subcommand(
Command::new("multi")
.about("tests subcommands")
.author("Kevin K. <kbknapp@gmail.com>")
.version("0.1")
.arg(arg!(
-f --flag "tests flags"
))
.arg(
arg!(
-o --option <scoption> "tests options"
)
.required(false)
.num_args(1..)
.action(ArgAction::Append),
),
),
);
utils::assert_output(cmd, "ctest help subcmd multi", MULTI_SC_HELP, false);
}
#[test]
fn no_wrap_default_help() {
static DEFAULT_HELP: &str = "ctest 1.0
Usage:
ctest
Options:
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("ctest").version("1.0").term_width(0);
utils::assert_output(cmd, "ctest --help", DEFAULT_HELP, false);
}
#[test]
#[cfg(feature = "wrap_help")]
fn wrapped_help() {
static WRAPPED_HELP: &str = "test
Usage:
test [OPTIONS]
Options:
-a, --all
Also do versioning for private crates (will not be
published)
--exact
Specify inter dependency version numbers exactly with
`=`
--no-git-commit
Do not commit version changes
--no-git-push
Do not push generated commit and tags to git remote
-h, --help
Print help information
";
let cmd = Command::new("test")
.term_width(67)
.arg(
Arg::new("all")
.short('a')
.long("all")
.action(ArgAction::SetTrue)
.help("Also do versioning for private crates (will not be published)"),
)
.arg(
Arg::new("exact")
.long("exact")
.action(ArgAction::SetTrue)
.help("Specify inter dependency version numbers exactly with `=`"),
)
.arg(
Arg::new("no_git_commit")
.long("no-git-commit")
.action(ArgAction::SetTrue)
.help("Do not commit version changes"),
)
.arg(
Arg::new("no_git_push")
.long("no-git-push")
.action(ArgAction::SetTrue)
.help("Do not push generated commit and tags to git remote"),
);
utils::assert_output(cmd, "test --help", WRAPPED_HELP, false);
}
#[test]
#[cfg(feature = "wrap_help")]
fn unwrapped_help() {
static UNWRAPPED_HELP: &str = "test
Usage:
test [OPTIONS]
Options:
-a, --all Also do versioning for private crates
(will not be published)
--exact Specify inter dependency version numbers
exactly with `=`
--no-git-commit Do not commit version changes
--no-git-push Do not push generated commit and tags to
git remote
-h, --help Print help information
";
let cmd = Command::new("test")
.term_width(68)
.arg(
Arg::new("all")
.short('a')
.long("all")
.action(ArgAction::SetTrue)
.help("Also do versioning for private crates (will not be published)"),
)
.arg(
Arg::new("exact")
.long("exact")
.action(ArgAction::SetTrue)
.help("Specify inter dependency version numbers exactly with `=`"),
)
.arg(
Arg::new("no_git_commit")
.long("no-git-commit")
.action(ArgAction::SetTrue)
.help("Do not commit version changes"),
)
.arg(
Arg::new("no_git_push")
.long("no-git-push")
.action(ArgAction::SetTrue)
.help("Do not push generated commit and tags to git remote"),
);
utils::assert_output(cmd, "test --help", UNWRAPPED_HELP, false);
}
#[test]
#[cfg(all(feature = "wrap_help"))]
fn possible_value_wrapped_help() {
static WRAPPED_HELP: &str = "test
Usage:
test [OPTIONS]
Options:
--possible-values <possible_values>
Possible values:
- short_name:
Long enough help message, barely warrant wrapping
- second:
Short help gets handled the same
--possible-values-with-new-line <possible_values_with_new_line>
Possible values:
- long enough name to trigger new line:
Really long enough help message to clearly warrant
wrapping believe me
- second
--possible-values-without-new-line <possible_values_without_new_line>
Possible values:
- name: Short enough help message with no wrapping
- second: short help
-h, --help
Print help information
";
let cmd = Command::new("test")
.term_width(67)
.arg(
Arg::new("possible_values")
.long("possible-values")
.action(ArgAction::Set)
.value_parser([
PossibleValue::new("short_name")
.help("Long enough help message, barely warrant wrapping"),
PossibleValue::new("second").help("Short help gets handled the same"),
]),
)
.arg(
Arg::new("possible_values_with_new_line")
.long("possible-values-with-new-line")
.action(ArgAction::Set)
.value_parser([
PossibleValue::new("long enough name to trigger new line").help(
"Really long enough help message to clearly warrant wrapping believe me",
),
PossibleValue::new("second"),
]),
)
.arg(
Arg::new("possible_values_without_new_line")
.long("possible-values-without-new-line")
.action(ArgAction::Set)
.value_parser([
PossibleValue::new("name").help("Short enough help message with no wrapping"),
PossibleValue::new("second").help("short help"),
]),
);
utils::assert_output(cmd, "test --help", WRAPPED_HELP, false);
}
#[test]
fn complex_subcommand_help_output() {
static SC_HELP: &str = "clap-test-subcmd 0.1
Kevin K. <kbknapp@gmail.com>
tests subcommands
Usage:
clap-test subcmd [OPTIONS] [scpositional]
Arguments:
[scpositional] tests positionals
Options:
-o, --option <scoption>... tests options
-f, --flag... tests flags
-s, --subcmdarg <subcmdarg> tests other args
-h, --help Print help information
-V, --version Print version information
";
let a = utils::complex_app();
utils::assert_output(a, "clap-test subcmd --help", SC_HELP, false);
}
#[test]
fn issue_626_unicode_cutoff() {
static ISSUE_626_CUTOFF: &str = "ctest 0.1
Usage:
ctest [OPTIONS]
Options:
-c, --cafe <FILE> A coffeehouse, coffee shop, or café is an
establishment which primarily serves hot
coffee, related coffee beverages (e.g., café
latte, cappuccino, espresso), tea, and other
hot beverages. Some coffeehouses also serve
cold beverages such as iced coffee and iced
tea. Many cafés also serve some type of food,
such as light snacks, muffins, or pastries.
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("ctest").version("0.1").term_width(70).arg(
Arg::new("cafe")
.short('c')
.long("cafe")
.value_name("FILE")
.help(
"A coffeehouse, coffee shop, or café is an establishment \
which primarily serves hot coffee, related coffee beverages \
(e.g., café latte, cappuccino, espresso), tea, and other hot \
beverages. Some coffeehouses also serve cold beverages such as \
iced coffee and iced tea. Many cafés also serve some type of \
food, such as light snacks, muffins, or pastries.",
)
.action(ArgAction::Set),
);
utils::assert_output(cmd, "ctest --help", ISSUE_626_CUTOFF, false);
}
static HIDE_POS_VALS: &str = "ctest 0.1
Usage:
ctest [OPTIONS]
Options:
-p, --pos <VAL> Some vals [possible values: fast, slow]
-c, --cafe <FILE> A coffeehouse, coffee shop, or café.
-h, --help Print help information
-V, --version Print version information
";
#[test]
fn hide_possible_vals() {
let cmd = Command::new("ctest")
.version("0.1")
.arg(
Arg::new("pos")
.short('p')
.long("pos")
.value_name("VAL")
.value_parser(["fast", "slow"])
.help("Some vals")
.action(ArgAction::Set),
)
.arg(
Arg::new("cafe")
.short('c')
.long("cafe")
.value_name("FILE")
.hide_possible_values(true)
.value_parser(["fast", "slow"])
.help("A coffeehouse, coffee shop, or café.")
.action(ArgAction::Set),
);
utils::assert_output(cmd, "ctest --help", HIDE_POS_VALS, false);
}
#[test]
fn hide_single_possible_val() {
let cmd = Command::new("ctest")
.version("0.1")
.arg(
Arg::new("pos")
.short('p')
.long("pos")
.value_name("VAL")
.value_parser([
"fast".into(),
"slow".into(),
PossibleValue::new("secret speed").hide(true),
])
.help("Some vals")
.action(ArgAction::Set),
)
.arg(
Arg::new("cafe")
.short('c')
.long("cafe")
.value_name("FILE")
.help("A coffeehouse, coffee shop, or café.")
.action(ArgAction::Set),
);
utils::assert_output(cmd, "ctest --help", HIDE_POS_VALS, false);
}
#[test]
fn possible_vals_with_help() {
static POS_VALS_HELP: &str = "ctest 0.1
Usage:
ctest [OPTIONS]
Options:
-p, --pos <VAL>
Some vals
Possible values:
- fast
- slow: not as fast
-c, --cafe <FILE>
A coffeehouse, coffee shop, or café.
-h, --help
Print help information
-V, --version
Print version information
";
let app = Command::new("ctest")
.version("0.1")
.arg(
Arg::new("pos")
.short('p')
.long("pos")
.value_name("VAL")
.value_parser([
PossibleValue::new("fast"),
PossibleValue::new("slow").help("not as fast"),
PossibleValue::new("secret speed").hide(true),
])
.help("Some vals")
.action(ArgAction::Set),
)
.arg(
Arg::new("cafe")
.short('c')
.long("cafe")
.value_name("FILE")
.help("A coffeehouse, coffee shop, or café.")
.action(ArgAction::Set),
);
utils::assert_output(app, "ctest --help", POS_VALS_HELP, false);
}
#[test]
fn issue_626_panic() {
static ISSUE_626_PANIC: &str = "ctest 0.1
Usage:
ctest [OPTIONS]
Options:
-c, --cafe <FILE>
La culture du café est très développée
dans de nombreux pays à climat chaud
d\'Amérique, d\'Afrique et d\'Asie, dans
des plantations qui sont cultivées pour
les marchés d\'exportation. Le café est
souvent une contribution majeure aux
exportations des régions productrices.
-h, --help
Print help information
-V, --version
Print version information
";
let cmd = Command::new("ctest")
.version("0.1")
.term_width(52)
.arg(Arg::new("cafe")
.short('c')
.long("cafe")
.value_name("FILE")
.help("La culture du café est très développée dans de nombreux pays à climat chaud d'Amérique, \
d'Afrique et d'Asie, dans des plantations qui sont cultivées pour les marchés d'exportation. \
Le café est souvent une contribution majeure aux exportations des régions productrices.")
.action(ArgAction::Set));
utils::assert_output(cmd, "ctest --help", ISSUE_626_PANIC, false);
}
#[test]
fn issue_626_variable_panic() {
for i in 10..320 {
let _ = Command::new("ctest")
.version("0.1")
.term_width(i)
.arg(Arg::new("cafe")
.short('c')
.long("cafe")
.value_name("FILE")
.help("La culture du café est très développée dans de nombreux pays à climat chaud d'Amérique, \
d'Afrique et d'Asie, dans des plantations qui sont cultivées pour les marchés d'exportation. \
Le café est souvent une contribution majeure aux exportations des régions productrices.")
.action(ArgAction::Set))
.try_get_matches_from(vec!["ctest", "--help"]);
}
}
#[test]
fn final_word_wrapping() {
static FINAL_WORD_WRAPPING: &str = "ctest 0.1
Usage:
ctest
Options:
-h, --help
Print help
information
-V, --version
Print
version
information
";
let cmd = Command::new("ctest").version("0.1").term_width(24);
utils::assert_output(cmd, "ctest --help", FINAL_WORD_WRAPPING, false);
}
static WRAPPING_NEWLINE_CHARS: &str = "ctest 0.1
Usage:
ctest [mode]
Arguments:
[mode] x, max, maximum 20 characters, contains
symbols.
l, long Copy-friendly, 14
characters, contains symbols.
m, med, medium Copy-friendly, 8
characters, contains symbols.
Options:
-h, --help Print help information
-V, --version Print version information
";
#[test]
fn wrapping_newline_chars() {
let cmd = Command::new("ctest")
.version("0.1")
.term_width(60)
.arg(Arg::new("mode").help(
"x, max, maximum 20 characters, contains symbols.\n\
l, long Copy-friendly, 14 characters, contains symbols.\n\
m, med, medium Copy-friendly, 8 characters, contains symbols.\n",
));
utils::assert_output(cmd, "ctest --help", WRAPPING_NEWLINE_CHARS, false);
}
#[test]
fn wrapping_newline_variables() {
let cmd = Command::new("ctest")
.version("0.1")
.term_width(60)
.arg(Arg::new("mode").help(
"x, max, maximum 20 characters, contains symbols.{n}\
l, long Copy-friendly, 14 characters, contains symbols.{n}\
m, med, medium Copy-friendly, 8 characters, contains symbols.{n}",
));
utils::assert_output(cmd, "ctest --help", WRAPPING_NEWLINE_CHARS, false);
}
#[test]
fn dont_wrap_urls() {
let cmd = Command::new("Example")
.term_width(30)
.subcommand(Command::new("update").arg(
Arg::new("force-non-host")
.help("Install toolchains that require an emulator. See https://github.com/rust-lang/rustup/wiki/Non-host-toolchains")
.long("force-non-host")
.action(ArgAction::SetTrue))
);
const EXPECTED: &str = "\
Example-update
Usage:
Example update [OPTIONS]
Options:
--force-non-host
Install toolchains
that require an
emulator. See
https://github.com/rust-lang/rustup/wiki/Non-host-toolchains
-h, --help
Print help
information
";
utils::assert_output(cmd, "Example update --help", EXPECTED, false);
}
static OLD_NEWLINE_CHARS: &str = "ctest 0.1
Usage:
ctest [OPTIONS]
Options:
-m Some help with some wrapping
(Defaults to something)
-h, --help Print help information
-V, --version Print version information
";
#[test]
fn old_newline_chars() {
let cmd = Command::new("ctest").version("0.1").arg(
Arg::new("mode")
.short('m')
.action(ArgAction::SetTrue)
.help("Some help with some wrapping\n(Defaults to something)"),
);
utils::assert_output(cmd, "ctest --help", OLD_NEWLINE_CHARS, false);
}
#[test]
fn old_newline_variables() {
let cmd = Command::new("ctest").version("0.1").arg(
Arg::new("mode")
.short('m')
.action(ArgAction::SetTrue)
.help("Some help with some wrapping{n}(Defaults to something)"),
);
utils::assert_output(cmd, "ctest --help", OLD_NEWLINE_CHARS, false);
}
#[test]
fn issue_688_hide_pos_vals() {
static ISSUE_688: &str = "ctest 0.1
Usage:
ctest [OPTIONS]
Options:
--filter <filter> Sets the filter, or sampling method, to use for interpolation when resizing the particle
images. The default is Linear (Bilinear). [possible values: Nearest, Linear, Cubic,
Gaussian, Lanczos3]
-h, --help Print help information
-V, --version Print version information
";
let filter_values = ["Nearest", "Linear", "Cubic", "Gaussian", "Lanczos3"];
let app1 = Command::new("ctest")
.version("0.1")
.term_width(120)
.hide_possible_values(true)
.arg(Arg::new("filter")
.help("Sets the filter, or sampling method, to use for interpolation when resizing the particle \
images. The default is Linear (Bilinear). [possible values: Nearest, Linear, Cubic, Gaussian, Lanczos3]")
.long("filter")
.value_parser(filter_values)
.action(ArgAction::Set));
utils::assert_output(app1, "ctest --help", ISSUE_688, false);
let app2 = Command::new("ctest")
.version("0.1")
.term_width(120)
.arg(Arg::new("filter")
.help("Sets the filter, or sampling method, to use for interpolation when resizing the particle \
images. The default is Linear (Bilinear).")
.long("filter")
.value_parser(filter_values)
.action(ArgAction::Set));
utils::assert_output(app2, "ctest --help", ISSUE_688, false);
let app3 = Command::new("ctest")
.version("0.1")
.term_width(120)
.arg(Arg::new("filter")
.help("Sets the filter, or sampling method, to use for interpolation when resizing the particle \
images. The default is Linear (Bilinear). [possible values: Nearest, Linear, Cubic, Gaussian, Lanczos3]")
.long("filter")
.action(ArgAction::Set));
utils::assert_output(app3, "ctest --help", ISSUE_688, false);
}
#[test]
fn issue_702_multiple_values() {
static ISSUE_702: &str = "myapp 1.0
foo
bar
Usage:
myapp [OPTIONS] [arg1] [arg2]...
Arguments:
[arg1] some option
[arg2]... some option
Options:
-s, --some <some> some option
-o, --other <other> some other option
-l, --label <label>... a label
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("myapp")
.version("1.0")
.author("foo")
.about("bar")
.arg(Arg::new("arg1").help("some option"))
.arg(
Arg::new("arg2")
.action(ArgAction::Set)
.num_args(1..)
.help("some option"),
)
.arg(
Arg::new("some")
.help("some option")
.short('s')
.long("some")
.action(ArgAction::Set),
)
.arg(
Arg::new("other")
.help("some other option")
.short('o')
.long("other")
.action(ArgAction::Set),
)
.arg(
Arg::new("label")
.help("a label")
.short('l')
.long("label")
.num_args(1..)
.action(ArgAction::Set),
);
utils::assert_output(cmd, "myapp --help", ISSUE_702, false);
}
#[test]
fn long_about() {
static LONG_ABOUT: &str = "myapp 1.0
foo
something really really long, with
multiple lines of text
that should be displayed
Usage:
myapp [arg1]
Arguments:
[arg1]
some option
Options:
-h, --help
Print help information
-V, --version
Print version information
";
let cmd = Command::new("myapp")
.version("1.0")
.author("foo")
.about("bar")
.long_about(
"something really really long, with\nmultiple lines of text\nthat should be displayed",
)
.arg(Arg::new("arg1").help("some option"));
utils::assert_output(cmd, "myapp --help", LONG_ABOUT, false);
}
static RIPGREP_USAGE: &str = "ripgrep 0.5
Usage:
rg [OPTIONS] <pattern> [<path> ...]
rg [OPTIONS] [-e PATTERN | -f FILE ]... [<path> ...]
rg [OPTIONS] --files [<path> ...]
rg [OPTIONS] --type-list
Options:
-h, --help Print help information
-V, --version Print version information
";
#[test]
fn ripgrep_usage() {
let cmd = Command::new("ripgrep").version("0.5").override_usage(
"rg [OPTIONS] <pattern> [<path> ...]
rg [OPTIONS] [-e PATTERN | -f FILE ]... [<path> ...]
rg [OPTIONS] --files [<path> ...]
rg [OPTIONS] --type-list",
);
utils::assert_output(cmd, "rg --help", RIPGREP_USAGE, false);
}
#[test]
fn ripgrep_usage_using_templates() {
let cmd = Command::new("ripgrep")
.version("0.5")
.override_usage(
"
rg [OPTIONS] <pattern> [<path> ...]
rg [OPTIONS] [-e PATTERN | -f FILE ]... [<path> ...]
rg [OPTIONS] --files [<path> ...]
rg [OPTIONS] --type-list",
)
.help_template(
"\
{bin} {version}
Usage:{usage}
Options:
{options}",
);
utils::assert_output(cmd, "rg --help", RIPGREP_USAGE, false);
}
#[test]
fn sc_negates_reqs() {
static SC_NEGATES_REQS: &str = "prog 1.0
Usage:
prog --opt <FILE> [PATH]
prog [PATH] <SUBCOMMAND>
Subcommands:
test
help Print this message or the help of the given subcommand(s)
Arguments:
[PATH] help
Options:
-o, --opt <FILE> tests options
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("prog")
.version("1.0")
.subcommand_negates_reqs(true)
.arg(arg!(-o --opt <FILE> "tests options"))
.arg(Arg::new("PATH").help("help"))
.subcommand(Command::new("test"));
utils::assert_output(cmd, "prog --help", SC_NEGATES_REQS, false);
}
#[test]
fn hide_args() {
static HIDDEN_ARGS: &str = "prog 1.0
Usage:
prog [OPTIONS]
Options:
-f, --flag testing flags
-o, --opt <FILE> tests options
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("prog")
.version("1.0")
.arg(arg!(-f --flag "testing flags"))
.arg(arg!(-o --opt <FILE> "tests options").required(false))
.arg(Arg::new("pos").hide(true));
utils::assert_output(cmd, "prog --help", HIDDEN_ARGS, false);
}
#[test]
fn args_negate_sc() {
static ARGS_NEGATE_SC: &str = "prog 1.0
Usage:
prog [OPTIONS] [PATH]
prog <SUBCOMMAND>
Subcommands:
test
help Print this message or the help of the given subcommand(s)
Arguments:
[PATH] help
Options:
-f, --flag testing flags
-o, --opt <FILE> tests options
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("prog")
.version("1.0")
.args_conflicts_with_subcommands(true)
.arg(arg!(-f --flag "testing flags"))
.arg(arg!(-o --opt <FILE> "tests options").required(false))
.arg(Arg::new("PATH").help("help"))
.subcommand(Command::new("test"));
utils::assert_output(cmd, "prog --help", ARGS_NEGATE_SC, false);
}
#[test]
fn issue_1046_hide_scs() {
static ISSUE_1046_HIDDEN_SCS: &str = "prog 1.0
Usage:
prog [OPTIONS] [PATH]
Arguments:
[PATH] some
Options:
-f, --flag testing flags
-o, --opt <FILE> tests options
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("prog")
.version("1.0")
.arg(arg!(-f --flag "testing flags"))
.arg(arg!(-o --opt <FILE> "tests options").required(false))
.arg(Arg::new("PATH").help("some"))
.subcommand(Command::new("test").hide(true));
utils::assert_output(cmd, "prog --help", ISSUE_1046_HIDDEN_SCS, false);
}
#[test]
fn issue_777_wrap_all_things() {
static ISSUE_777: &str = "A cmd with a crazy very long long
long name hahaha 1.0
Some Very Long Name and crazy long
email <email@server.com>
Show how the about text is not
wrapped
Usage:
ctest
Options:
-h, --help
Print help information
-V, --version
Print version
information
";
let cmd = Command::new("A cmd with a crazy very long long long name hahaha")
.version("1.0")
.author("Some Very Long Name and crazy long email <email@server.com>")
.about("Show how the about text is not wrapped")
.term_width(35);
utils::assert_output(cmd, "ctest --help", ISSUE_777, false);
}
static OVERRIDE_HELP_SHORT: &str = "test 0.1
Usage:
test
Options:
-H, --help Print help information
-V, --version Print version information
";
#[test]
fn override_help_short() {
let cmd = Command::new("test")
.version("0.1")
.arg(arg!(-H --help "Print help information").action(ArgAction::Help))
.disable_help_flag(true);
utils::assert_output(cmd.clone(), "test --help", OVERRIDE_HELP_SHORT, false);
utils::assert_output(cmd, "test -H", OVERRIDE_HELP_SHORT, false);
}
static OVERRIDE_HELP_LONG: &str = "test 0.1
Usage:
test [OPTIONS]
Options:
-h, --hell Print help information
-V, --version Print version information
";
#[test]
fn override_help_long() {
let cmd = Command::new("test")
.version("0.1")
.arg(arg!(-h --hell "Print help information").action(ArgAction::Help))
.disable_help_flag(true);
utils::assert_output(cmd.clone(), "test --hell", OVERRIDE_HELP_LONG, false);
utils::assert_output(cmd, "test -h", OVERRIDE_HELP_LONG, false);
}
static OVERRIDE_HELP_ABOUT: &str = "test 0.1
Usage:
test
Options:
-h, --help Print custom help information
-V, --version Print version information
";
#[test]
fn override_help_about() {
let cmd = Command::new("test")
.version("0.1")
.arg(arg!(-h --help "Print custom help information").action(ArgAction::Help))
.disable_help_flag(true);
utils::assert_output(cmd.clone(), "test --help", OVERRIDE_HELP_ABOUT, false);
utils::assert_output(cmd, "test -h", OVERRIDE_HELP_ABOUT, false);
}
#[test]
#[cfg(debug_assertions)]
#[should_panic = "Command conflict: Argument names must be unique, but 'help' is in use by more than one argument or group (call `cmd.disable_help_flag(true)` to remove the auto-generated `--help`)"]
fn arg_id_conflict_with_help() {
Command::new("conflict")
.arg(Arg::new("help").short('?').action(ArgAction::SetTrue))
.build();
}
#[test]
#[cfg(debug_assertions)]
#[should_panic = "Command conflict: Short option names must be unique for each argument, but '-h' is in use by both 'home' and 'help' (call `cmd.disable_help_flag(true)` to remove the auto-generated `--help`)"]
fn arg_short_conflict_with_help() {
Command::new("conflict")
.arg(Arg::new("home").short('h').action(ArgAction::SetTrue))
.build();
}
#[test]
#[cfg(debug_assertions)]
#[should_panic = "Command conflict: Long option names must be unique for each argument, but '--help' is in use by both 'custom-help' and 'help' (call `cmd.disable_help_flag(true)` to remove the auto-generated `--help`)"]
fn arg_long_conflict_with_help() {
Command::new("conflict")
.arg(
Arg::new("custom-help")
.long("help")
.action(ArgAction::SetTrue),
)
.build();
}
#[test]
fn last_arg_mult_usage() {
static LAST_ARG: &str = "last 0.1
Usage:
last <TARGET> [CORPUS] [-- <ARGS>...]
Arguments:
<TARGET> some
[CORPUS] some
[ARGS]... some
Options:
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("last")
.version("0.1")
.arg(Arg::new("TARGET").required(true).help("some"))
.arg(Arg::new("CORPUS").help("some"))
.arg(
Arg::new("ARGS")
.action(ArgAction::Set)
.num_args(1..)
.last(true)
.help("some"),
);
utils::assert_output(cmd, "last --help", LAST_ARG, false);
}
#[test]
fn last_arg_mult_usage_req() {
static LAST_ARG_REQ: &str = "last 0.1
Usage:
last <TARGET> [CORPUS] -- <ARGS>...
Arguments:
<TARGET> some
[CORPUS] some
<ARGS>... some
Options:
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("last")
.version("0.1")
.arg(Arg::new("TARGET").required(true).help("some"))
.arg(Arg::new("CORPUS").help("some"))
.arg(
Arg::new("ARGS")
.action(ArgAction::Set)
.num_args(1..)
.last(true)
.required(true)
.help("some"),
);
utils::assert_output(cmd, "last --help", LAST_ARG_REQ, false);
}
#[test]
fn last_arg_mult_usage_req_with_sc() {
static LAST_ARG_REQ_SC: &str = "last 0.1
Usage:
last <TARGET> [CORPUS] -- <ARGS>...
last [TARGET] [CORPUS] <SUBCOMMAND>
Subcommands:
test some
help Print this message or the help of the given subcommand(s)
Arguments:
<TARGET> some
[CORPUS] some
<ARGS>... some
Options:
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("last")
.version("0.1")
.subcommand_negates_reqs(true)
.arg(Arg::new("TARGET").required(true).help("some"))
.arg(Arg::new("CORPUS").help("some"))
.arg(
Arg::new("ARGS")
.action(ArgAction::Set)
.num_args(1..)
.last(true)
.required(true)
.help("some"),
)
.subcommand(Command::new("test").about("some"));
utils::assert_output(cmd, "last --help", LAST_ARG_REQ_SC, false);
}
#[test]
fn last_arg_mult_usage_with_sc() {
static LAST_ARG_SC: &str = "last 0.1
Usage:
last <TARGET> [CORPUS] [-- <ARGS>...]
last <SUBCOMMAND>
Subcommands:
test some
help Print this message or the help of the given subcommand(s)
Arguments:
<TARGET> some
[CORPUS] some
[ARGS]... some
Options:
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("last")
.version("0.1")
.args_conflicts_with_subcommands(true)
.arg(Arg::new("TARGET").required(true).help("some"))
.arg(Arg::new("CORPUS").help("some"))
.arg(
Arg::new("ARGS")
.action(ArgAction::Set)
.num_args(1..)
.last(true)
.help("some"),
)
.subcommand(Command::new("test").about("some"));
utils::assert_output(cmd, "last --help", LAST_ARG_SC, false);
}
static HIDE_DEFAULT_VAL: &str = "default 0.1
Usage:
default [OPTIONS]
Options:
--arg <argument> Pass an argument to the program. [default: default-argument]
-h, --help Print help information
-V, --version Print version information
";
#[test]
fn hide_default_val() {
let app1 = Command::new("default").version("0.1").term_width(120).arg(
Arg::new("argument")
.help("Pass an argument to the program. [default: default-argument]")
.long("arg")
.default_value("default-argument")
.hide_default_value(true),
);
utils::assert_output(app1, "default --help", HIDE_DEFAULT_VAL, false);
let app2 = Command::new("default").version("0.1").term_width(120).arg(
Arg::new("argument")
.help("Pass an argument to the program.")
.long("arg")
.default_value("default-argument"),
);
utils::assert_output(app2, "default --help", HIDE_DEFAULT_VAL, false);
}
#[test]
fn escaped_whitespace_values() {
static ESCAPED_DEFAULT_VAL: &str = "default 0.1
Usage:
default [OPTIONS]
Options:
--arg <argument> Pass an argument to the program. [default: \"\\n\"] [possible values: normal, \" \", \"\\n\", \"\\t\",
other]
-h, --help Print help information
-V, --version Print version information
";
let app1 = Command::new("default").version("0.1").term_width(120).arg(
Arg::new("argument")
.help("Pass an argument to the program.")
.long("arg")
.default_value("\n")
.value_parser(["normal", " ", "\n", "\t", "other"]),
);
utils::assert_output(app1, "default --help", ESCAPED_DEFAULT_VAL, false);
}
fn issue_1112_setup() -> Command {
Command::new("test")
.version("1.3")
.disable_help_flag(true)
.arg(
Arg::new("help1")
.long("help")
.short('h')
.help("some help")
.action(ArgAction::SetTrue),
)
.subcommand(
Command::new("foo").arg(
Arg::new("help1")
.long("help")
.short('h')
.help("some help")
.action(ArgAction::SetTrue),
),
)
}
#[test]
fn prefer_user_help_long_1112() {
let m = issue_1112_setup().try_get_matches_from(vec!["test", "--help"]);
assert!(m.is_ok(), "{}", m.unwrap_err());
let m = m.unwrap();
assert!(*m.get_one::<bool>("help1").expect("defaulted by clap"));
}
#[test]
fn prefer_user_help_short_1112() {
let m = issue_1112_setup().try_get_matches_from(vec!["test", "-h"]);
assert!(m.is_ok(), "{}", m.unwrap_err());
let m = m.unwrap();
assert!(*m.get_one::<bool>("help1").expect("defaulted by clap"));
}
#[test]
fn prefer_user_subcmd_help_long_1112() {
let m = issue_1112_setup().try_get_matches_from(vec!["test", "foo", "--help"]);
assert!(m.is_ok(), "{}", m.unwrap_err());
let m = m.unwrap();
assert!(*m
.subcommand_matches("foo")
.unwrap()
.get_one::<bool>("help1")
.expect("defaulted by clap"));
}
#[test]
fn prefer_user_subcmd_help_short_1112() {
let m = issue_1112_setup().try_get_matches_from(vec!["test", "foo", "-h"]);
assert!(m.is_ok(), "{}", m.unwrap_err());
let m = m.unwrap();
assert!(m
.subcommand_matches("foo")
.unwrap()
.get_one::<bool>("help1")
.expect("defaulted by clap"));
}
#[test]
fn issue_1052_require_delim_help() {
static REQUIRE_DELIM_HELP: &str = "test 1.3
Kevin K.
tests stuff
Usage:
test --fake <some> <val>
Options:
-f, --fake <some> <val> some help
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("test")
.author("Kevin K.")
.about("tests stuff")
.version("1.3")
.arg(
arg!(-f --fake <s> "some help")
.required(true)
.value_names(["some", "val"])
.action(ArgAction::Set)
.value_delimiter(':'),
);
utils::assert_output(cmd, "test --help", REQUIRE_DELIM_HELP, false);
}
#[test]
fn custom_headers_headers() {
static CUSTOM_HELP_SECTION: &str = "blorp 1.4
Will M.
does stuff
Usage:
test [OPTIONS] --fake <some> <val>
Options:
-f, --fake <some> <val> some help
-h, --help Print help information
-V, --version Print version information
NETWORKING:
-n, --no-proxy Do not use system proxy settings
--port
";
let cmd = Command::new("blorp")
.author("Will M.")
.about("does stuff")
.version("1.4")
.arg(
arg!(-f --fake <s> "some help")
.required(true)
.value_names(["some", "val"])
.action(ArgAction::Set)
.value_delimiter(':'),
)
.next_help_heading(Some("NETWORKING"))
.arg(
Arg::new("no-proxy")
.short('n')
.long("no-proxy")
.action(ArgAction::SetTrue)
.help("Do not use system proxy settings"),
)
.args([Arg::new("port").long("port").action(ArgAction::SetTrue)]);
utils::assert_output(cmd, "test --help", CUSTOM_HELP_SECTION, false);
}
static MULTIPLE_CUSTOM_HELP_SECTIONS: &str = "blorp 1.4
Will M.
does stuff
Usage:
test [OPTIONS] --fake <some> <val> --birthday-song <song> --birthday-song-volume <volume>
Options:
-f, --fake <some> <val> some help
--style <style> Choose musical style to play the song
-s, --speed <SPEED> How fast? [possible values: fast, slow]
-h, --help Print help information
-V, --version Print version information
NETWORKING:
-n, --no-proxy Do not use system proxy settings
-a, --server-addr Set server address
OVERRIDE SPECIAL:
-b, --birthday-song <song> Change which song is played for birthdays
SPECIAL:
-v, --birthday-song-volume <volume> Change the volume of the birthday song
";
#[test]
fn multiple_custom_help_headers() {
let cmd = Command::new("blorp")
.author("Will M.")
.about("does stuff")
.version("1.4")
.arg(
arg!(-f --fake <s> "some help")
.required(true)
.value_names(["some", "val"])
.action(ArgAction::Set)
.value_delimiter(':'),
)
.next_help_heading(Some("NETWORKING"))
.arg(
Arg::new("no-proxy")
.short('n')
.long("no-proxy")
.action(ArgAction::SetTrue)
.help("Do not use system proxy settings"),
)
.next_help_heading(Some("SPECIAL"))
.arg(
arg!(-b --"birthday-song" <song> "Change which song is played for birthdays")
.help_heading(Some("OVERRIDE SPECIAL")),
)
.arg(
arg!(--style <style> "Choose musical style to play the song")
.required(false)
.help_heading(None),
)
.arg(arg!(
-v --"birthday-song-volume" <volume> "Change the volume of the birthday song"
))
.next_help_heading(None)
.arg(
Arg::new("server-addr")
.short('a')
.long("server-addr")
.action(ArgAction::SetTrue)
.help("Set server address")
.help_heading(Some("NETWORKING")),
)
.arg(
Arg::new("speed")
.long("speed")
.short('s')
.value_name("SPEED")
.value_parser(["fast", "slow"])
.help("How fast?")
.action(ArgAction::Set),
);
utils::assert_output(cmd, "test --help", MULTIPLE_CUSTOM_HELP_SECTIONS, false);
}
static CUSTOM_HELP_SECTION_HIDDEN_ARGS: &str = "blorp 1.4
Will M.
does stuff
Usage:
test [OPTIONS] --song <song> --song-volume <volume>
Options:
-h, --help Print help information
-V, --version Print version information
OVERRIDE SPECIAL:
-b, --song <song> Change which song is played for birthdays
SPECIAL:
-v, --song-volume <volume> Change the volume of the birthday song
";
#[test]
fn custom_help_headers_hide_args() {
let cmd = Command::new("blorp")
.author("Will M.")
.about("does stuff")
.version("1.4")
.next_help_heading(Some("NETWORKING"))
.arg(
Arg::new("no-proxy")
.short('n')
.long("no-proxy")
.help("Do not use system proxy settings")
.hide_short_help(true),
)
.next_help_heading(Some("SPECIAL"))
.arg(
arg!(-b --song <song> "Change which song is played for birthdays")
.help_heading(Some("OVERRIDE SPECIAL")),
)
.arg(arg!(
-v --"song-volume" <volume> "Change the volume of the birthday song"
))
.next_help_heading(None)
.arg(
Arg::new("server-addr")
.short('a')
.long("server-addr")
.help("Set server address")
.help_heading(Some("NETWORKING"))
.hide_short_help(true),
);
utils::assert_output(cmd, "test -h", CUSTOM_HELP_SECTION_HIDDEN_ARGS, false);
}
static ISSUE_897: &str = "ctest-foo 0.1
Long about foo
Usage:
ctest foo
Options:
-h, --help
Print help information
-V, --version
Print version information
";
#[test]
fn show_long_about_issue_897() {
let cmd = Command::new("ctest").version("0.1").subcommand(
Command::new("foo")
.version("0.1")
.about("About foo")
.long_about("Long about foo"),
);
utils::assert_output(cmd, "ctest foo --help", ISSUE_897, false);
}
static ISSUE_897_SHORT: &str = "ctest-foo 0.1
About foo
Usage:
ctest foo
Options:
-h, --help Print help information
-V, --version Print version information
";
#[test]
fn show_short_about_issue_897() {
let cmd = Command::new("ctest").version("0.1").subcommand(
Command::new("foo")
.version("0.1")
.about("About foo")
.long_about("Long about foo"),
);
utils::assert_output(cmd, "ctest foo -h", ISSUE_897_SHORT, false);
}
#[test]
fn issue_1364_no_short_options() {
static ISSUE_1364: &str = "demo
Usage:
demo [OPTIONS] [FILES]...
Arguments:
[FILES]...
Options:
-f
-h, --help Print help information
";
let cmd = Command::new("demo")
.arg(Arg::new("foo").short('f').action(ArgAction::SetTrue))
.arg(
Arg::new("baz")
.short('z')
.value_name("BAZ")
.hide_short_help(true),
)
.arg(
Arg::new("files")
.value_name("FILES")
.action(ArgAction::Set)
.num_args(1..),
);
utils::assert_output(cmd, "demo -h", ISSUE_1364, false);
}
#[rustfmt::skip]
#[test]
fn issue_1487() {
static ISSUE_1487: &str = "test
Usage:
ctest <arg1|arg2>
Arguments:
[arg1]
[arg2]
Options:
-h, --help Print help information
";
let cmd = Command::new("test")
.arg(Arg::new("arg1")
.group("group1"))
.arg(Arg::new("arg2")
.group("group1"))
.group(ArgGroup::new("group1")
.args(["arg1", "arg2"])
.required(true));
utils::assert_output(cmd, "ctest -h", ISSUE_1487, false);
}
#[cfg(debug_assertions)]
#[test]
#[should_panic = "Command::help_expected is enabled for the Command"]
fn help_required_but_not_given() {
Command::new("myapp")
.help_expected(true)
.arg(Arg::new("foo"))
.try_get_matches_from(empty_args())
.unwrap();
}
#[cfg(debug_assertions)]
#[test]
#[should_panic = "Command::help_expected is enabled for the Command"]
fn help_required_but_not_given_settings_after_args() {
Command::new("myapp")
.arg(Arg::new("foo"))
.help_expected(true)
.try_get_matches_from(empty_args())
.unwrap();
}
#[cfg(debug_assertions)]
#[test]
#[should_panic = "Command::help_expected is enabled for the Command"]
fn help_required_but_not_given_for_one_of_two_arguments() {
Command::new("myapp")
.help_expected(true)
.arg(Arg::new("foo"))
.arg(Arg::new("bar").help("It does bar stuff"))
.try_get_matches_from(empty_args())
.unwrap();
}
#[test]
#[should_panic = "List of such arguments: delete"]
fn help_required_globally() {
Command::new("myapp")
.help_expected(true)
.arg(Arg::new("foo").help("It does foo stuff"))
.subcommand(
Command::new("bar")
.arg(Arg::new("create").help("creates bar"))
.arg(Arg::new("delete")),
)
.try_get_matches_from(empty_args())
.unwrap();
}
#[cfg(debug_assertions)]
#[test]
#[should_panic = "Command::help_expected is enabled for the Command"]
fn help_required_globally_but_not_given_for_subcommand() {
Command::new("myapp")
.help_expected(true)
.arg(Arg::new("foo").help("It does foo stuff"))
.subcommand(
Command::new("bar")
.arg(Arg::new("create").help("creates bar"))
.arg(Arg::new("delete")),
)
.try_get_matches_from(empty_args())
.unwrap();
}
#[test]
fn help_required_and_given_for_subcommand() {
Command::new("myapp")
.help_expected(true)
.arg(Arg::new("foo").help("It does foo stuff"))
.subcommand(
Command::new("bar")
.arg(Arg::new("create").help("creates bar"))
.arg(Arg::new("delete").help("deletes bar")),
)
.try_get_matches_from(empty_args())
.unwrap();
}
#[test]
fn help_required_and_given() {
Command::new("myapp")
.help_expected(true)
.arg(Arg::new("foo").help("It does foo stuff"))
.try_get_matches_from(empty_args())
.unwrap();
}
#[test]
fn help_required_and_no_args() {
Command::new("myapp")
.help_expected(true)
.try_get_matches_from(empty_args())
.unwrap();
}
#[test]
fn issue_1642_long_help_spacing() {
static ISSUE_1642: &str = "prog
Usage:
prog [OPTIONS]
Options:
--config
The config file used by the myprog must be in JSON format
with only valid keys and may not contain other nonsense
that cannot be read by this program. Obviously I'm going on
and on, so I'll stop now.
-h, --help
Print help information
";
let cmd = Command::new("prog").arg(
Arg::new("cfg")
.long("config")
.action(ArgAction::SetTrue)
.long_help(
"The config file used by the myprog must be in JSON format
with only valid keys and may not contain other nonsense
that cannot be read by this program. Obviously I'm going on
and on, so I'll stop now.",
),
);
utils::assert_output(cmd, "prog --help", ISSUE_1642, false);
}
const AFTER_HELP_NO_ARGS: &str = "myapp 1.0
Usage:
myapp
This is after help.
";
#[test]
fn after_help_no_args() {
let mut cmd = Command::new("myapp")
.version("1.0")
.disable_help_flag(true)
.disable_version_flag(true)
.after_help("This is after help.");
let help = {
let mut output = Vec::new();
cmd.write_help(&mut output).unwrap();
String::from_utf8(output).unwrap()
};
assert_eq!(help, AFTER_HELP_NO_ARGS);
}
#[test]
fn help_subcmd_help() {
static HELP_SUBCMD_HELP: &str = "myapp-help
Print this message or the help of the given subcommand(s)
Usage:
myapp help [SUBCOMMAND]...
Arguments:
[SUBCOMMAND]... The subcommand whose help message to display
";
let cmd = Command::new("myapp")
.subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
utils::assert_output(cmd.clone(), "myapp help help", HELP_SUBCMD_HELP, false);
}
#[test]
fn subcmd_help_subcmd_help() {
static SUBCMD_HELP_SUBCMD_HELP: &str = "myapp-subcmd-help
Print this message or the help of the given subcommand(s)
Usage:
myapp subcmd help [SUBCOMMAND]...
Arguments:
[SUBCOMMAND]... The subcommand whose help message to display
";
let cmd = Command::new("myapp")
.subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
utils::assert_output(
cmd.clone(),
"myapp subcmd help help",
SUBCMD_HELP_SUBCMD_HELP,
false,
);
}
#[test]
fn global_args_should_show_on_toplevel_help_message() {
static HELP: &str = "myapp\x20
Usage:
myapp [OPTIONS] [SUBCOMMAND]
Subcommands:
subcmd\x20\x20\x20\x20
help Print this message or the help of the given subcommand(s)
Options:
-g, --some-global <someglobal>\x20\x20\x20\x20
-h, --help Print help information
";
let cmd = Command::new("myapp")
.arg(
Arg::new("someglobal")
.short('g')
.long("some-global")
.global(true),
)
.subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
utils::assert_output(cmd, "myapp help", HELP, false);
}
#[test]
fn global_args_should_not_show_on_help_message_for_help_help() {
static HELP_HELP: &str = "myapp-help\x20
Print this message or the help of the given subcommand(s)
Usage:
myapp help [SUBCOMMAND]...
Arguments:
[SUBCOMMAND]... The subcommand whose help message to display
";
let cmd = Command::new("myapp")
.arg(
Arg::new("someglobal")
.short('g')
.long("some-global")
.global(true),
)
.subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
utils::assert_output(cmd, "myapp help help", HELP_HELP, false);
}
#[test]
fn global_args_should_show_on_help_message_for_subcommand() {
static HELP_SUBCMD: &str = "myapp-subcmd\x20
Usage:
myapp subcmd [OPTIONS] [SUBCOMMAND]
Subcommands:
multi\x20\x20\x20\x20
help Print this message or the help of the given subcommand(s)
Options:
-g, --some-global <someglobal>\x20\x20\x20\x20
-h, --help Print help information
";
let cmd = Command::new("myapp")
.arg(
Arg::new("someglobal")
.short('g')
.long("some-global")
.global(true),
)
.subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
utils::assert_output(cmd, "myapp help subcmd", HELP_SUBCMD, false);
}
#[test]
fn global_args_should_show_on_help_message_for_nested_subcommand() {
static HELP_SUB_SUBCMD: &str = "myapp-subcmd-multi 1.0
Usage:
myapp subcmd multi [OPTIONS]
Options:
-g, --some-global <someglobal>\x20\x20\x20\x20
-h, --help Print help information
-V, --version Print version information
";
let cmd = Command::new("myapp")
.arg(
Arg::new("someglobal")
.short('g')
.long("some-global")
.global(true),
)
.subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
utils::assert_output(cmd, "myapp help subcmd multi", HELP_SUB_SUBCMD, false);
}
#[test]
fn option_usage_order() {
static OPTION_USAGE_ORDER: &str = "order
Usage:
order [OPTIONS]
Options:
-a
-B
-b
-s
--select_file
--select_folder
-x
-h, --help Print help information
";
let cmd = Command::new("order").args([
Arg::new("a").short('a').action(ArgAction::SetTrue),
Arg::new("B").short('B').action(ArgAction::SetTrue),
Arg::new("b").short('b').action(ArgAction::SetTrue),
Arg::new("save").short('s').action(ArgAction::SetTrue),
Arg::new("select_file")
.long("select_file")
.action(ArgAction::SetTrue),
Arg::new("select_folder")
.long("select_folder")
.action(ArgAction::SetTrue),
Arg::new("x").short('x').action(ArgAction::SetTrue),
]);
utils::assert_output(cmd, "order --help", OPTION_USAGE_ORDER, false);
}
#[test]
fn prefer_about_over_long_about_in_subcommands_list() {
static ABOUT_IN_SUBCOMMANDS_LIST: &str = "about-in-subcommands-list
Usage:
about-in-subcommands-list [SUBCOMMAND]
Subcommands:
sub short about sub
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help information
";
let cmd = Command::new("about-in-subcommands-list").subcommand(
Command::new("sub")
.long_about("long about sub")
.about("short about sub"),
);
utils::assert_output(
cmd,
"about-in-subcommands-list --help",
ABOUT_IN_SUBCOMMANDS_LIST,
false,
);
}
#[test]
fn issue_1794_usage() {
static USAGE_WITH_GROUP: &str = "hello
Usage:
deno <pos1|--option1> [pos2]
Arguments:
[pos1]
[pos2]
Options:
--option1
-h, --help Print help information
";
let cmd = clap::Command::new("hello")
.bin_name("deno")
.arg(
Arg::new("option1")
.long("option1")
.action(ArgAction::SetTrue),
)
.arg(Arg::new("pos1").action(ArgAction::Set))
.group(
ArgGroup::new("arg1")
.args(["pos1", "option1"])
.required(true),
)
.arg(Arg::new("pos2").action(ArgAction::Set));
utils::assert_output(cmd, "deno --help", USAGE_WITH_GROUP, false);
}
static CUSTOM_HEADING_POS: &str = "test 1.4
Usage:
test [gear] [speed]
Arguments:
[gear] Which gear
Options:
-h, --help Print help information
-V, --version Print version information
NETWORKING:
[speed] How fast
";
#[test]
fn custom_heading_pos() {
let cmd = Command::new("test")
.version("1.4")
.arg(Arg::new("gear").help("Which gear"))
.next_help_heading(Some("NETWORKING"))
.arg(Arg::new("speed").help("How fast"));
utils::assert_output(cmd, "test --help", CUSTOM_HEADING_POS, false);
}
static ONLY_CUSTOM_HEADING_OPTS_NO_ARGS: &str = "test 1.4
Usage:
test [OPTIONS]
NETWORKING:
-s, --speed <SPEED> How fast
";
#[test]
fn only_custom_heading_opts_no_args() {
let cmd = Command::new("test")
.version("1.4")
.disable_version_flag(true)
.disable_help_flag(true)
.arg(arg!(--help).action(ArgAction::Help).hide(true))
.next_help_heading(Some("NETWORKING"))
.arg(arg!(-s --speed <SPEED> "How fast").required(false));
utils::assert_output(cmd, "test --help", ONLY_CUSTOM_HEADING_OPTS_NO_ARGS, false);
}
static ONLY_CUSTOM_HEADING_POS_NO_ARGS: &str = "test 1.4
Usage:
test [speed]
NETWORKING:
[speed] How fast
";
#[test]
fn only_custom_heading_pos_no_args() {
let cmd = Command::new("test")
.version("1.4")
.disable_version_flag(true)
.disable_help_flag(true)
.arg(arg!(--help).action(ArgAction::Help).hide(true))
.next_help_heading(Some("NETWORKING"))
.arg(Arg::new("speed").help("How fast"));
utils::assert_output(cmd, "test --help", ONLY_CUSTOM_HEADING_POS_NO_ARGS, false);
}
#[test]
fn issue_2508_number_of_values_with_single_value_name() {
let cmd = Command::new("my_app")
.arg(Arg::new("some_arg").long("some_arg").num_args(2))
.arg(
Arg::new("some_arg_issue")
.long("some_arg_issue")
.num_args(2)
.value_name("ARG"),
);
utils::assert_output(
cmd,
"my_app --help",
"my_app
Usage:
my_app [OPTIONS]
Options:
--some_arg <some_arg> <some_arg>
--some_arg_issue <ARG> <ARG>
-h, --help Print help information
",
false,
);
}
#[test]
fn missing_positional_final_required() {
let cmd = Command::new("test")
.allow_missing_positional(true)
.arg(Arg::new("arg1"))
.arg(Arg::new("arg2").required(true));
utils::assert_output(
cmd,
"test --help",
"test
Usage:
test [arg1] <arg2>
Arguments:
[arg1]
<arg2>
Options:
-h, --help Print help information
",
false,
);
}
#[test]
fn missing_positional_final_multiple() {
let cmd = Command::new("test")
.allow_missing_positional(true)
.arg(Arg::new("foo"))
.arg(Arg::new("bar"))
.arg(Arg::new("baz").action(ArgAction::Set).num_args(1..));
utils::assert_output(
cmd,
"test --help",
"test
Usage:
test [foo] [bar] [baz]...
Arguments:
[foo]
[bar]
[baz]...
Options:
-h, --help Print help information
",
false,
);
}
#[test]
fn positional_multiple_values_is_dotted() {
let cmd = Command::new("test").arg(
Arg::new("foo")
.required(true)
.action(ArgAction::Set)
.num_args(1..),
);
utils::assert_output(
cmd,
"test --help",
"test
Usage:
test <foo>...
Arguments:
<foo>...
Options:
-h, --help Print help information
",
false,
);
let cmd = Command::new("test").arg(
Arg::new("foo")
.required(true)
.action(ArgAction::Set)
.value_name("BAR")
.num_args(1..),
);
utils::assert_output(
cmd,
"test --help",
"test
Usage:
test <BAR>...
Arguments:
<BAR>...
Options:
-h, --help Print help information
",
false,
);
}
#[test]
fn positional_multiple_occurrences_is_dotted() {
let cmd = Command::new("test").arg(
Arg::new("foo")
.required(true)
.action(ArgAction::Set)
.num_args(1..)
.action(ArgAction::Append),
);
utils::assert_output(
cmd,
"test --help",
"test
Usage:
test <foo>...
Arguments:
<foo>...
Options:
-h, --help Print help information
",
false,
);
let cmd = Command::new("test").arg(
Arg::new("foo")
.required(true)
.action(ArgAction::Set)
.value_name("BAR")
.num_args(1..)
.action(ArgAction::Append),
);
utils::assert_output(
cmd,
"test --help",
"test
Usage:
test <BAR>...
Arguments:
<BAR>...
Options:
-h, --help Print help information
",
false,
);
}
#[test]
fn too_few_value_names_is_dotted() {
let cmd = Command::new("test").arg(
Arg::new("foo")
.long("foo")
.required(true)
.action(ArgAction::Set)
.num_args(3)
.value_names(["one", "two"]),
);
utils::assert_output(
cmd,
"test --help",
"test
Usage:
test --foo <one> <two>...
Options:
--foo <one> <two>...
-h, --help Print help information
",
false,
);
}
#[test]
#[should_panic = "Argument foo: Too many value names (2) compared to `num_args` (1)"]
fn too_many_value_names_panics() {
Command::new("test")
.arg(
Arg::new("foo")
.long("foo")
.required(true)
.action(ArgAction::Set)
.num_args(1)
.value_names(["one", "two"]),
)
.debug_assert()
}
#[test]
fn disabled_help_flag() {
let res = Command::new("foo")
.subcommand(Command::new("sub"))
.disable_help_flag(true)
.try_get_matches_from("foo a".split(' '));
assert!(res.is_err());
let err = res.unwrap_err();
assert_eq!(err.kind(), ErrorKind::InvalidSubcommand);
}
#[test]
fn disabled_help_flag_and_subcommand() {
let res = Command::new("foo")
.subcommand(Command::new("sub"))
.disable_help_flag(true)
.disable_help_subcommand(true)
.try_get_matches_from("foo help".split(' '));
assert!(res.is_err());
let err = res.unwrap_err();
assert_eq!(err.kind(), ErrorKind::InvalidSubcommand);
assert!(
err.to_string().ends_with('\n'),
"Errors should have a trailing newline, got {:?}",
err.to_string()
);
}
#[test]
fn override_help_subcommand() {
let cmd = Command::new("bar")
.subcommand(Command::new("help").arg(Arg::new("arg").action(ArgAction::Set)))
.subcommand(Command::new("not_help").arg(Arg::new("arg").action(ArgAction::Set)))
.disable_help_subcommand(true);
let matches = cmd.try_get_matches_from(&["bar", "help", "foo"]).unwrap();
assert_eq!(
matches
.subcommand_matches("help")
.unwrap()
.get_one::<String>("arg")
.map(|v| v.as_str()),
Some("foo")
);
}
#[test]
fn override_help_flag_using_long() {
let cmd = Command::new("foo")
.subcommand(Command::new("help").long_flag("help"))
.disable_help_flag(true)
.disable_help_subcommand(true);
let matches = cmd.try_get_matches_from(&["foo", "--help"]).unwrap();
assert!(matches.subcommand_matches("help").is_some());
}
#[test]
fn override_help_flag_using_short() {
let cmd = Command::new("foo")
.disable_help_flag(true)
.disable_help_subcommand(true)
.subcommand(Command::new("help").short_flag('h'));
let matches = cmd.try_get_matches_from(&["foo", "-h"]).unwrap();
assert!(matches.subcommand_matches("help").is_some());
}
#[test]
fn subcommand_help_doesnt_have_useless_help_flag() {
// The main care-about is that the docs and behavior match. Since the `help` subcommand
// currently ignores the `--help` flag, the output shouldn't have it.
let cmd = Command::new("example").subcommand(Command::new("test").about("Subcommand"));
utils::assert_output(
cmd,
"example help help",
"example-help
Print this message or the help of the given subcommand(s)
Usage:
example help [SUBCOMMAND]...
Arguments:
[SUBCOMMAND]... The subcommand whose help message to display
",
false,
);
}
#[test]
fn disable_help_flag_affects_help_subcommand() {
let mut cmd = Command::new("test_app")
.disable_help_flag(true)
.subcommand(Command::new("test").about("Subcommand"));
cmd.build();
let args = cmd
.find_subcommand("help")
.unwrap()
.get_arguments()
.map(|a| a.get_id().as_str())
.collect::<Vec<_>>();
assert!(
!args.contains(&"help"),
"`help` should not be present: {:?}",
args
);
}
#[test]
fn dont_propagate_version_to_help_subcommand() {
let cmd = clap::Command::new("example")
.version("1.0")
.propagate_version(true)
.subcommand(clap::Command::new("subcommand"));
utils::assert_output(
cmd.clone(),
"example help help",
"example-help
Print this message or the help of the given subcommand(s)
Usage:
example help [SUBCOMMAND]...
Arguments:
[SUBCOMMAND]... The subcommand whose help message to display
",
false,
);
cmd.debug_assert();
}
#[test]
fn help_without_short() {
let mut cmd = clap::Command::new("test")
.arg(arg!(-h --hex <NUM>))
.arg(arg!(--help).action(ArgAction::Help))
.disable_help_flag(true);
cmd.build();
let help = cmd.get_arguments().find(|a| a.get_id() == "help").unwrap();
assert_eq!(help.get_short(), None);
let m = cmd.try_get_matches_from(["test", "-h", "0x100"]).unwrap();
assert_eq!(
m.get_one::<String>("hex").map(|v| v.as_str()),
Some("0x100")
);
}
#[test]
fn parent_cmd_req_in_usage_with_help_flag() {
static EXPECTED: &str = "parent-test
some
Usage:
parent <TARGET> <ARGS> test
Options:
-h, --help Print help information
";
let cmd = Command::new("parent")
.version("0.1")
.arg(Arg::new("TARGET").required(true).help("some"))
.arg(
Arg::new("ARGS")
.action(ArgAction::Set)
.required(true)
.help("some"),
)
.subcommand(Command::new("test").about("some"));
utils::assert_output(cmd, "parent test --help", EXPECTED, false);
}
#[test]
fn parent_cmd_req_in_usage_with_help_subcommand() {
static EXPECTED: &str = "parent-test
some
Usage:
parent <TARGET> <ARGS> test
Options:
-h, --help Print help information
";
let cmd = Command::new("parent")
.version("0.1")
.arg(Arg::new("TARGET").required(true).help("some"))
.arg(
Arg::new("ARGS")
.action(ArgAction::Set)
.required(true)
.help("some"),
)
.subcommand(Command::new("test").about("some"));
utils::assert_output(cmd, "parent help test", EXPECTED, false);
}
#[test]
fn parent_cmd_req_in_usage_with_render_help() {
static EXPECTED: &str = "parent-test
some
Usage:
parent <TARGET> <ARGS> test
Options:
-h, --help Print help information
";
let mut cmd = Command::new("parent")
.version("0.1")
.arg(Arg::new("TARGET").required(true).help("some"))
.arg(
Arg::new("ARGS")
.action(ArgAction::Set)
.required(true)
.help("some"),
)
.subcommand(Command::new("test").about("some"));
cmd.build();
let subcmd = cmd.find_subcommand_mut("test").unwrap();
let mut buf = Vec::new();
subcmd.write_help(&mut buf).unwrap();
utils::assert_eq(EXPECTED, String::from_utf8(buf).unwrap());
}
#[test]
fn parent_cmd_req_ignored_when_negates_reqs() {
static MULTI_SC_HELP: &str = "ctest-subcmd
Usage:
ctest subcmd
Options:
-h, --help Print help information
";
let cmd = Command::new("ctest")
.arg(arg!(<input>))
.subcommand_negates_reqs(true)
.subcommand(Command::new("subcmd"));
utils::assert_output(cmd, "ctest subcmd --help", MULTI_SC_HELP, false);
}
#[test]
fn parent_cmd_req_ignored_when_conflicts() {
static MULTI_SC_HELP: &str = "ctest-subcmd
Usage:
ctest subcmd
Options:
-h, --help Print help information
";
let cmd = Command::new("ctest")
.arg(arg!(<input>))
.args_conflicts_with_subcommands(true)
.subcommand(Command::new("subcmd"));
utils::assert_output(cmd, "ctest subcmd --help", MULTI_SC_HELP, false);
}
#[test]
fn no_wrap_help() {
let cmd = Command::new("ctest")
.term_width(0)
.override_help(MULTI_SC_HELP);
utils::assert_output(cmd, "ctest --help", &format!("{}\n", MULTI_SC_HELP), false);
}
#[test]
fn display_name_default() {
let mut cmd = Command::new("app").bin_name("app.exe");
cmd.build();
assert_eq!(cmd.get_display_name(), None);
}
#[test]
fn display_name_explicit() {
let mut cmd = Command::new("app")
.bin_name("app.exe")
.display_name("app.display");
cmd.build();
assert_eq!(cmd.get_display_name(), Some("app.display"));
}
#[test]
fn display_name_subcommand_default() {
let mut cmd = Command::new("parent").subcommand(Command::new("child").bin_name("child.exe"));
cmd.build();
assert_eq!(
cmd.find_subcommand("child").unwrap().get_display_name(),
Some("parent-child")
);
}
#[test]
fn display_name_subcommand_explicit() {
let mut cmd = Command::new("parent").subcommand(
Command::new("child")
.bin_name("child.exe")
.display_name("child.display"),
);
cmd.build();
assert_eq!(
cmd.find_subcommand("child").unwrap().get_display_name(),
Some("child.display")
);
}
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