Good To Have: Offline/Online tests

Good to have: Check that when internet goes down part way through certain activities, they fall back to the offline storage.

The issue does not name any files, tests, or activities. Start by locating the offline-storage implementation and the activities that use it, then identify how network loss can be simulated during an operation. Done means tests verify that those activities fall back to offline storage when connectivity is lost partway through.

Written by the indexing model from the issue text.