expect(mutation_response['errors']).toeq(['Only epics and epic_issues are supported.'])
expect(graphql_errors.first['message']).toinclude("\"#{variables[:moved][:id]}\" does not represent an instance of EpicTreeSorting")
expect(graphql_errors.first['message']).toinclude("\"#{variables[:moved][:adjacent_reference_id]}\" does not represent an instance of EpicTreeSorting")