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use clap::Parser;
/// Minimal SafariBooks port (cookies only).
#[derive(Parser, Debug, PartialEq)]
#[command(version)]
pub struct Args {
/// Book digits ID from the O'Reilly URL.
pub bookid: String,
/// Do not delete the log file on success.
#[arg(long = "preserve-log")]
pub preserve_log: bool,
}
#[cfg(test)]
mod tests {
use super::Args;
use clap::{CommandFactory, Parser};
#[test]
fn parses_positional_bookid_only() {
// safaribooks-rs 9781491958698
let args = Args::try_parse_from(["safaribooks-rs", "9781491958698"]).unwrap();
assert_eq!(args.bookid, "9781491958698");
assert!(!args.preserve_log);
}
#[test]
fn parses_with_preserve_log_flag() {
// safaribooks-rs --preserve-log 9781491958698
let args =
Args::try_parse_from(["safaribooks-rs", "--preserve-log", "9781491958698"]).unwrap();
assert_eq!(args.bookid, "9781491958698");
assert!(args.preserve_log);
}
#[test]
fn error_when_missing_bookid() {
// safaribooks-rs --preserve-log
let err = Args::try_parse_from(["safaribooks-rs", "--preserve-log"]).unwrap_err();
let msg = err.to_string();
// clap’s message should indicate the missing required argument
assert!(msg.contains("<BOOKID>"));
}
#[test]
fn error_on_unknown_flag() {
// safaribooks-rs --kindle 9781491958698
let err =
Args::try_parse_from(["safaribooks-rs", "--kindle", "9781491958698"]).unwrap_err();
let msg = err.to_string().to_lowercase();
assert!(msg.contains("unexpected argument '--kindle' found"));
}
#[test]
fn help_and_version_are_available() {
// `--help` and `--version` are auto-provided by clap
let help = Args::command().render_help().to_string();
assert!(help.contains("Usage:"));
assert!(help.contains("<BOOKID>"));
assert!(help.contains("--preserve-log"));
let version = Args::command().render_version();
assert!(!version.trim().is_empty());
}
}
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