preftool-clap-derive 0.1.0

use clap::App;
use preftool_clap::ClapConfigExt;
use preftool_clap_derive::ClapConfig;

#[derive(ClapConfig)]
pub struct Server {
  #[preftool_clap(help = "Server host")]
  host: String,

  #[preftool_clap(help = "Server port")]
  port: usize,

  #[preftool_clap(help = "Server certificate (enables TLS)")]
  cert: Option<String>,
}

#[derive(ClapConfig)]
pub struct Settings {
  server: Server,
}

#[test]
fn sets_host() {
  let args = vec!["test", "--server-host=localhost"];
  let result = Settings::from_cli_args(App::new("test"), args).unwrap();

  assert_eq!(result.len(), 1);
  assert_eq!(result.get("server:host").unwrap(), "localhost");
  assert_eq!(result.get("server:port"), None);
}

#[test]
fn sets_port() {
  let args = vec!["test", "--server-port", "8080"];
  let result = Settings::from_cli_args(App::new("test"), args).unwrap();

  assert_eq!(result.len(), 1);
  assert_eq!(result.get("server:port").unwrap(), "8080");
  assert_eq!(result.get("server:host"), None);
}

#[test]
fn sets_both() {
  let args = vec!["test", "--server-port", "8080", "--server-host=otherhost"];
  let result = Settings::from_cli_args(App::new("test"), args).unwrap();

  assert_eq!(result.len(), 2);
  assert_eq!(result.get("server:port").unwrap(), "8080");
  assert_eq!(result.get("server:host").unwrap(), "otherhost");
}