def test_points_from_instructions():
wire = Wire()
wire.extend_points_from_instructions("U2")
assert wire.points == [(0, 0), (0, 1), (0, 2)]
wire = Wire()
wire.extend_points_from_instructions("U2,R2")
assert wire.points == [(0, 0), (0, 1), (0, 2), (1, 2), (2, 2)]
