1 files changed, 65 insertions, 0 deletions
diff --git a/src/tests/extensions.rs b/src/tests/extensions.rs
new file mode 100644
index 0000000..9e70181
--- /dev/null
+++ b/src/tests/extensions.rs
@@ -0,0 +1,65 @@
+// 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(())
+}