Maybe adding a check to compare old and new directory name and do only the renaming if they differ.

Thanks for the review. There already is a similar check in the ProcessForm when saving a process that compares old and new process title and only triggers renaming actions if the titles differ:

Ideally this would be checked inside the renaming function itself to cover all use cases but thanks to the check above the renaming function is already skipped when manually saving a single process without changing the title. Should I change this PR to adjust the code accordingly or leave that change to a separate PR?

As the renaming functionality of the FileManagement class from the Kitodo-Filemanagement module for files or directories could be called from everywhere I would add even there a check and doing the renaming of files or directories only if they differ. I think that this additional check should be done in the pull request as the comparing should be simple and easy. If this is more complicated than move it to a separate pull request.

@henning-gerhardt I added a check to skip renaming a directory if the new name equals the old name and a corresponding test. Since the behaviour of renaming files is a little different and does not relate to the changes in this pull request I have not added a similar check, there.