Convert tests for api
Convert tests for api

ellisonbg/nbgrader,modulexcite/nbgrader,jupyter/nbgrader,EdwardJKim/nbgrader,ellisonbg/nbgrader,dementrock/nbgrader,jhamrick/nbgrader,jhamrick/nbgrader,jhamrick/nbgrader,EdwardJKim/nbgrader,jupyter/nbgrader,alope107/nbgrader,MatKallada/nbgrader,jupyter/nbgrader,ellisonbg/nbgrader,EdwardJKim/nbgrader,modulexcite/nbgrader,MatKallada/nbgrader,jupyter/nbgrader,EdwardJKim/nbgrader,dementrock/nbgrader,jupyter/nbgrader,jhamrick/nbgrader,ellisonbg/nbgrader,alope107/nbgrader