libcli 0.3.9

A collection of utilities to help making command line based programs
Documentation 
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#[cfg(test)]
mod tests {
    use libcli::args;

    #[test]
    fn parse_0() {
        let specs = [
            args::OptionSpec::new(
                '\0',
                "(unnamed)",
                "Unnamed arguments",
                true,
                args::OptionPolicy::AtLeast(1),
            ),
            args::OptionSpec::new(
                'r',
                "recursive",
                "Searches recursive",
                false,
                args::OptionPolicy::Exact(0),
            ),
            args::OptionSpec::new(
                'o',
                "output",
                "Specifies output file",
                true,
                args::OptionPolicy::Finalize(),
            ),
            args::OptionSpec::new(
                'v',
                "verbose",
                "Shows verbose output",
                false,
                args::OptionPolicy::Exact(1),
            ),
            args::OptionSpec::new(
                'n',
                "number",
                "The number of iterations to perform",
                false,
                args::OptionPolicy::Exact(1),
            ),
        ];

        let args = [
            "./test",
            "myfile.txt",
            "-r",
            "-vn",
            "3",
            "--output",
            "output.txt",
        ];

        println!(
            "Usage:\n{}",
            args::Config::generate_usage(&specs, false, true)
        );

        let config = args::Config::new(&args[..], &specs).unwrap_or_else(|err| panic!(err));

        assert_eq!(
            *config
                .option("output")
                .expect("Didn't parse --output option"),
            ["output.txt".to_string()],
        );
        assert_eq!(
            *config
                .option("number")
                .expect("Didn't parse --number option"),
            ["3".to_string()],
        );

        println!("r: {:?}", config.option("recursive"));
    }

    #[test]
    #[should_panic]
    fn parse_too_few() {
        let specs = [args::OptionSpec::new(
            '\0',
            "(unnamed)",
            "Files to search",
            true,
            args::OptionPolicy::AtLeast(2),
        )];

        let args = ["./test"];

        args::Config::new(&args[..], &specs).unwrap_or_else(|err| panic!(err));
    }

    #[test]
    #[should_panic]
    fn parse_too_many() {
        let specs = [args::OptionSpec::new(
            '\0',
            "(unnamed)",
            "File to search",
            true,
            args::OptionPolicy::AtMost(1),
        )];

        let args = ["./test", "file1", "file2"];
        args::Config::new(&args[..], &specs).unwrap_or_else(|err| panic!(err));
    }

    #[test]
    #[should_panic]
    fn parse_dup() {
        let specs = [
            args::OptionSpec::new(
                '\0',
                "(unnamed)",
                "Unnamed",
                true,
                args::OptionPolicy::AtLeast(1),
            ),
            args::OptionSpec::new(
                'o',
                "output",
                "Specifies the output file",
                true,
                args::OptionPolicy::Exact(1),
            ),
        ];

        let args = ["./test", "-o", "file1", "-o", "file2"];
        args::Config::new(&args[..], &specs).unwrap_or_else(|err| panic!(err));
    }

    #[test]
    fn parse_dup_switch() {
        let specs = [
            args::OptionSpec::new(
                '\0',
                "(unnamed)",
                "Unnamed",
                true,
                args::OptionPolicy::AtLeast(1),
            ),
            args::OptionSpec::new(
                'o',
                "output",
                "Specifies the output file",
                true,
                args::OptionPolicy::Exact(1),
            ),
            args::OptionSpec::new(
                'v',
                "verbose",
                "Show verbose output",
                true,
                args::OptionPolicy::Exact(0),
            ),
        ];

        let args = ["./test", "foo", "-vo", "file1", "-v"];
        args::Config::new(&args[..], &specs).unwrap_or_else(|err| panic!(err));
    }
}