### Problem <!-- For a bug report, please copy and paste any error messages from the application or command-line here. For a feature request, please state how the new functionality could benefit the community. --> It is created from https://github.com/diffpy/diffpy.apps/pull/7#issuecomment-4209126875. We need more tests to cover the functionality of the existing code. ### Proposed solution
Problem
It is created from #7 (comment).
We need more tests to cover the functionality of the existing code.
Proposed solution