def METHOD_NAME(self, join):
    for wire in self.all_wires:
        new_wire = offset_wire(wire, 0.0, label="new", join=join)
        assert np.isclose(wire.length, new_wire.length)
        assert new_wire.label == "new"
    for wire in self.all_wires:
        new_wire = offset_wire(wire, 0.0, label="new")
        assert np.isclose(wire.length, new_wire.length)
        assert new_wire.label == "new"