libsbml.Reaction.addReactant C# (CSharp) Method

        public int addReactant(Species species)
        {
            int ret = libsbmlPINVOKE.Reaction_addReactant__SWIG_4(swigCPtr, Species.getCPtr(species));
            return ret;
        }

 public void test_Reaction_addReactant4()
 {
     Reaction m = new  Reaction(2,2);
       SpeciesReference p = null;
       int i = m.addReactant(p);
       assertTrue( i == libsbml.LIBSBML_OPERATION_FAILED );
       assertTrue( m.getNumReactants() == 0 );
       m = null;
 }