// extensions.rs

// *************************************************************************
// * Copyright (C) 2020 Daniel Mueller (deso@posteo.net)                   *
// *                                                                       *
// * This program is free software: you can redistribute it and/or modify  *
// * it under the terms of the GNU General Public License as published by  *
// * the Free Software Foundation, either version 3 of the License, or     *
// * (at your option) any later version.                                   *
// *                                                                       *
// * This program is distributed in the hope that it will be useful,       *
// * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
// * GNU General Public License for more details.                          *
// *                                                                       *
// * You should have received a copy of the GNU General Public License     *
// * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
// *************************************************************************

use std::env;
use std::fs;
use std::io;

use super::*;

use crate::commands::resolve_extension;
use crate::Error;

#[test]
fn discover_extensions() -> crate::Result<()> {
  let dir1 = tempfile::tempdir()?;
  let dir2 = tempfile::tempdir()?;

  {
    let ext1_path = dir1.path().join("nitrocli-ext1");
    let ext2_path = dir1.path().join("nitrocli-ext2");
    let ext3_path = dir2.path().join("nitrocli-super-1337-extensions111one");
    let _ext1 = fs::File::create(&ext1_path)?;
    let _ext2 = fs::File::create(&ext2_path)?;
    let _ext3 = fs::File::create(&ext3_path)?;

    let path = env::join_paths(&[dir1.path(), dir2.path()]).map_err(|err| err.to_string())?;
    assert_eq!(
      resolve_extension(&path, ffi::OsStr::new("ext1"))?,
      ext1_path
    );
    assert_eq!(
      resolve_extension(&path, ffi::OsStr::new("ext2"))?,
      ext2_path
    );
    assert_eq!(
      resolve_extension(&path, ffi::OsStr::new("super-1337-extensions111one"))?,
      ext3_path
    );

    match resolve_extension(&ffi::OsStr::new(""), ffi::OsStr::new("ext1")) {
      Err(Error::IoError(err)) if err.kind() == io::ErrorKind::NotFound => {
        let expected = io::Error::new(io::ErrorKind::NotFound, "extension nitrocli-ext1 not found");
        assert_eq!(err.to_string(), expected.to_string())
      }
      r => panic!("Unexpected variant found: {:?}", r),
    }
  }
  Ok(())
}