This module includes unittests of the Xponge.Assign operators
Test the functions to get assignment
test creating a new rule to assign the Xponge.AtomType of one atom
test convert an Xponge.ResidueType to Xponge.Assign
test creating a new rule to assign the string of one atom
test the basic functions the the helper class _RING
test the function to delete an atom from an Xponge.Assign
test the function to delete a bond from an Xponge.Assign
test the function to find the equal atoms in a molecule
test the function to find the atom type
test the optimization of the molecule using UFF
test the function to save a Xponge.assign