Add js tests
Add js tests

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