def test_meta_remove_slot_shift_map_pointers():
first = PrimitiveStrObject("first")
second = PrimitiveStrObject("second")
third = PrimitiveStrObject("third")
o = Object()
assert not o._slot_values
o.meta_add_slot("first", first)
o.meta_add_slot("second", second)
o.meta_add_slot("third", third)
assert o.get_slot("first") is first
assert o.get_slot("second") is second
assert o.get_slot("third") is third
o.meta_remove_slot("first")
assert len(o._slot_values) == 2
assert len(o.map._slots) == 2
assert o.map._slots["second"] == 0
assert o.map._slots["third"] == 1
assert o.get_slot("first") is None
assert o.get_slot("second") == second
assert o.get_slot("third") == third
def test_meta_remove_slot():
o = Object()
assert not o._slot_values
o.meta_add_slot("test", Object())
assert o._slot_values
assert "test" in o.map._slots
o.meta_remove_slot("test")
assert not o._slot_values
assert "test" not in o.map._slots
def test_meta_remove_missing_slot():
o = Object()
o.meta_add_slot("test", Object())
assert not o.meta_remove_slot("x")
