added test case for names without _index
added test case for names without _index

senthil10/scilifelab,jun-wan/scilifelab,kate-v-stepanova/scilifelab,kate-v-stepanova/scilifelab,SciLifeLab/scilifelab,senthil10/scilifelab,jun-wan/scilifelab,jun-wan/scilifelab,senthil10/scilifelab,jun-wan/scilifelab,SciLifeLab/scilifelab,senthil10/scilifelab,kate-v-stepanova/scilifelab,kate-v-stepanova/scilifelab,SciLifeLab/scilifelab,SciLifeLab/scilifelab