adding test to test for initial sparsity
adding test to test for initial sparsity

Agent007/deepchem,deepchem/deepchem,lilleswing/deepchem,Agent007/deepchem,joegomes/deepchem,miaecle/deepchem,ktaneishi/deepchem,miaecle/deepchem,rbharath/deepchem,joegomes/deepchem,Agent007/deepchem,lilleswing/deepchem,rbharath/deepchem,ktaneishi/deepchem,peastman/deepchem,deepchem/deepchem,miaecle/deepchem,peastman/deepchem,ktaneishi/deepchem,lilleswing/deepchem