make tests more elegant
make tests more elegant

pratyakshs/pgmpy,pratyakshs/pgmpy,palashahuja/pgmpy,abinashpanda/pgmpy,anaviltripathi/pgmpy,liquidmetal/pgmpy,sandeepkrjha/pgmpy,ankurankan/pgmpy,abinashpanda/pgmpy,jhonatanoliveira/pgmpy,anaviltripathi/pgmpy,kris-singh/pgmpy,sandeepkrjha/pgmpy,ankurankan/pgmpy,pgmpy/pgmpy,liquidmetal/pgmpy,yashu-seth/pgmpy,kris-singh/pgmpy,jhonatanoliveira/pgmpy,yashu-seth/pgmpy,pgmpy/pgmpy,palashahuja/pgmpy,khalibartan/pgmpy,khalibartan/pgmpy