def test_foo_copy():
s = Skin()
s.foo = []
t = Skin(s.copy())
u = copy.copy(s)
assert s is not t
assert s is not u
assert s.foo.value is t.foo.value
assert s.foo.value is u.foo.value
def test_deepcopy():
s = Skin()
s.foo = []
t = copy.deepcopy(s)
assert s.foo.value is not t.foo.value
