Currently the function for showing messages in LastFm Importer Modal is present in other components. However this is against React's design principles and makes it difficult to add new code or test the existing code. Refactoring the code so that the content shown by Modal is controlled by the component itself will solve the issue.

For reference this is the code which has to me refactored

https://github.com/metabrainz/listenbrainz-server/blob/master/listenbrainz/webserver/static/js/src/LastFMImporterModal.tsx

https://github.com/metabrainz/listenbrainz-server/blob/master/listenbrainz/webserver/static/js/src/Importer.tsx