def test_parent_lookup_from_parent_tree():
"""
Based on real case.
"""
value = PrimitiveStrObject("value")
o1 = Object()
o2 = Object()
o3 = o2.clone()
o4 = Object()
o5 = Object()
o1.scope_parent = o2
o2.scope_parent = o3
o2.meta_add_parent("*", o5)
o3.scope_parent = o4
o3.meta_add_parent("*", o5)
o4.scope_parent = o5
o4.meta_add_slot("value", value)
assert o1.get_slot("value") is None
assert o1.parent_lookup("value") is value
def test_meta_add_parent_cloned_objects_use_same_map():
o = Object()
o.meta_add_parent("a", PrimitiveStrObject("value"))
x = o.clone()
assert "a" in o.parent_slot_keys
assert o.map == x.map
def test_meta_add_parent_structural_change_creates_new_map_add():
o = Object()
o.meta_add_parent("a", PrimitiveStrObject("value"))
x = o.clone()
assert o.map == x.map
x.meta_add_parent("*", PrimitiveStrObject("another"))
assert o.map != x.map
assert o != x
def test_meta_add_parent_cloned_objects_dont_change_when_parent_is_changed():
o = Object()
o.meta_add_parent("a", PrimitiveStrObject("value"))
x = o.clone()
assert o.map == x.map
x.meta_add_parent("a", PrimitiveStrObject("another"))
assert o.map == x.map
assert o != x
def test_meta_add_parent_structural_change_creates_new_map_remove():
o = Object()
o.meta_add_parent("a", PrimitiveStrObject("value"))
x = o.clone()
assert o.map == x.map
x.meta_remove_parent("a")
assert o.map != x.map
assert o != x
assert "a" in o.parent_slot_keys
def test_clone():
o = Object()
o.meta_add_slot("test", Object())
# clones share same map
clone = o.clone()
assert clone.map is o.map
assert clone._slot_values == o._slot_values
# clones with updated slot value share same map
clone.set_slot("test", Object())
assert clone.map is o.map
assert clone._slot_values != o._slot_values
# clones with different structure don't share maps
clone.meta_add_slot("another", Object())
assert clone.map is not o.map
assert clone._slot_values != o._slot_values
