def METHOD_NAME(self):
    atom1 = Atom(
        name="atom1", position=[0, 0, 0], atom_type=AtomType(name="A")
    )
    atom2 = Atom(
        name="atom2", position=[1, 0, 0], atom_type=AtomType(name="B")
    )
    atom3 = Atom(
        name="atom3", position=[1, 1, 0], atom_type=AtomType(name="C")
    )
    angtype = AngleType(
        member_types=[
            atom1.atom_type.name,
            atom2.atom_type.name,
            atom3.atom_type.name,
        ]
    )
    ang = Angle(
        connection_members=[atom1, atom2, atom3], angle_type=angtype
    )
    assert "A" in ang.angle_type.member_types
    assert "B" in ang.angle_type.member_types
    assert "C" in ang.angle_type.member_types