Head should throw error on directory (#10)

Author: Kimahriman

src/lib.rs

@@ -301,6 +301,13 @@ impl ObjectStore for HdfsObjectStore {
             .await
             .to_object_store_err()?;
 
+        if status.isdir {
+            return Err(HdfsError::IsADirectoryError(
+                "Head must be called on a file".to_string(),
+            ))
+            .to_object_store_err();
+        }
+
         Ok(ObjectMeta {
             location: location.clone(),
             last_modified: DateTime::<Utc>::from_timestamp(status.modification_time as i64, 0)

tests/test_object_store.rs

@@ -30,6 +30,8 @@ mod test {
         file.write(buf.freeze()).await.unwrap();
         file.close().await.unwrap();
 
+        client.mkdirs("/testdir", 0o755, true).await.unwrap();
+
         let store = HdfsObjectStore::new(Arc::new(client));
 
         test_object_store_head(&store).await?;
@@ -51,6 +53,7 @@ mod test {
         assert_eq!(head.size, TEST_FILE_INTS * 4);
 
         assert!(store.head(&Path::from("/testfile2")).await.is_err());
+        assert!(store.head(&Path::from("/testdir")).await.is_err());
 
         Ok(())
     }