Added tests. Fixes #106 and fixes #103
Added tests. Fixes #106 and fixes #103


Former-commit-id: cb170e1d9b0836d265ddb91d3033786ed7c60cc1
openworm/PyOpenWorm,gsarma/PyOpenWorm,kaustubhcs/PyOpenWorm,hnunner/PyOpenWorm,openworm/PyOpenWorm,gsarma/PyOpenWorm,travs/PyOpenWorm