clap/tests/builder/help.rs

use super::utils;

use clap::{arg, builder::PossibleValue, error::ErrorKind, Arg, ArgAction, ArgGroup, Command};

fn setup() -> Command<'static> {
    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>...

ARGS:
    <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>...]

ARGS:
    <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] [ARGS] [SUBCOMMAND]

ARGS:
    <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

SUBCOMMANDS:
    subcmd    tests subcommands
    help      Print this message or the help of the given subcommand(s)
";

    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_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 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]

ARGS:
    <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]

ARGS:
    <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] [--] [ARGS]

ARGS:
    <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]

ARGS:
    <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>

ARGS:
    <PATH>    help

OPTIONS:
    -o, --opt <FILE>    tests options
    -h, --help          Print help information
    -V, --version       Print version information

SUBCOMMANDS:
    test    
    help    Print this message or the help of the given subcommand(s)
";

    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>

ARGS:
    <PATH>    help

OPTIONS:
    -f, --flag          testing flags
    -o, --opt <FILE>    tests options
    -h, --help          Print help information
    -V, --version       Print version information

SUBCOMMANDS:
    test    
    help    Print this message or the help of the given subcommand(s)
";

    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]

ARGS:
    <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>...]

ARGS:
    <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>...

ARGS:
    <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 <SUBCOMMAND>

ARGS:
    <TARGET>     some
    <CORPUS>     some
    <ARGS>...    some

OPTIONS:
    -h, --help       Print help information
    -V, --version    Print version information

SUBCOMMANDS:
    test    some
    help    Print this message or the help of the given subcommand(s)
";

    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>

ARGS:
    <TARGET>     some
    <CORPUS>     some
    <ARGS>...    some

OPTIONS:
    -h, --help       Print help information
    -V, --version    Print version information

SUBCOMMANDS:
    test    some
    help    Print this message or the help of the given subcommand(s)
";

    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<'static> {
    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]...

ARGS:
    <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>

ARGS:
    <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]...

ARGS:
    <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]...

ARGS:
    <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 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]

OPTIONS:
    -h, --help    Print help information

SUBCOMMANDS:
    sub     short about sub
    help    Print this message or the help of the given subcommand(s)
";

    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]

ARGS:
    <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 [ARGS]

ARGS:
    <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>

ARGS:
    <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 [ARGS]

ARGS:
    <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>...

ARGS:
    <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>...

ARGS:
    <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>...

ARGS:
    <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>...

ARGS:
    <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]...

ARGS:
    <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())
        .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]...

ARGS:
    <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 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")
    );
}