Ensure drops don't close unrelated objects

Author: mulimoen

src/hl/file.rs

@@ -516,6 +516,7 @@ pub mod tests {
                 assert!(crate::handle::refcount(fileid).is_err());
                 assert!(crate::handle::refcount(groupid).is_err());
                 assert!(!group.is_valid());
+                drop(group);
             });
         });
     }

src/hl/group.rs

@@ -229,6 +229,9 @@ pub mod tests {
             h5lock!({
                 file.close().unwrap();
                 assert_eq!(format!("{:?}", a), "<HDF5 group: invalid id>");
+                drop(a);
+                drop(ab);
+                drop(abc);
             })
         })
     }

src/hl/object.rs

@@ -114,11 +114,14 @@ pub mod tests {
         obj.decref();
         assert_eq!(obj.refcount(), 1);
         obj.decref();
-        obj.decref();
-        assert_eq!(obj.refcount(), 0);
-        assert!(!obj.is_valid());
-        assert!(!is_valid_user_id(obj.id()));
-        assert!(!is_valid_id(obj.id()));
+        h5lock!({
+            obj.decref();
+            assert_eq!(obj.refcount(), 0);
+            assert!(!obj.is_valid());
+            assert!(!is_valid_user_id(obj.id()));
+            assert!(!is_valid_id(obj.id()));
+            drop(obj);
+        });
     }
 
     #[test]
@@ -156,6 +159,8 @@ pub mod tests {
             obj.decref();
             assert!(!obj.is_valid());
             assert!(!obj2.is_valid());
+            drop(obj);
+            drop(obj2);
         });
     }
 }