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import pickle
import re
import pytest
import env
from pybind11_tests import pickling as m
def test_pickle_simple_callable():
assert m.simple_callable() == 20220426
if env.PYPY:
serialized = pickle.dumps(m.simple_callable)
deserialized = pickle.loads(serialized)
assert deserialized() == 20220426
else:
# To document broken behavior: currently it fails universally with
# all C Python versions.
with pytest.raises(TypeError) as excinfo:
pickle.dumps(m.simple_callable)
assert re.search("can.*t pickle .*PyCapsule.* object", str(excinfo.value))
@pytest.mark.parametrize("cls_name", ["Pickleable", "PickleableNew"])
def test_roundtrip(cls_name):
cls = getattr(m, cls_name)
p = cls("test_value")
p.setExtra1(15)
p.setExtra2(48)
data = pickle.dumps(p, 2) # Must use pickle protocol >= 2
p2 = pickle.loads(data)
assert p2.value() == p.value()
assert p2.extra1() == p.extra1()
assert p2.extra2() == p.extra2()
@pytest.mark.xfail("env.PYPY")
@pytest.mark.parametrize("cls_name", ["PickleableWithDict", "PickleableWithDictNew"])
def test_roundtrip_with_dict(cls_name):
cls = getattr(m, cls_name)
p = cls("test_value")
p.extra = 15
p.dynamic = "Attribute"
data = pickle.dumps(p, pickle.HIGHEST_PROTOCOL)
p2 = pickle.loads(data)
assert p2.value == p.value
assert p2.extra == p.extra
assert p2.dynamic == p.dynamic
def test_enum_pickle():
from pybind11_tests import enums as e
data = pickle.dumps(e.EOne, 2)
assert e.EOne == pickle.loads(data)
#
# exercise_trampoline
#
class SimplePyDerived(m.SimpleBase):
pass
def test_roundtrip_simple_py_derived():
p = SimplePyDerived()
p.num = 202
p.stored_in_dict = 303
data = pickle.dumps(p, pickle.HIGHEST_PROTOCOL)
p2 = pickle.loads(data)
assert isinstance(p2, SimplePyDerived)
assert p2.num == 202
assert p2.stored_in_dict == 303
def test_roundtrip_simple_cpp_derived():
p = m.make_SimpleCppDerivedAsBase()
assert m.check_dynamic_cast_SimpleCppDerived(p)
p.num = 404
if not env.PYPY:
# To ensure that this unit test is not accidentally invalidated.
with pytest.raises(AttributeError):
# Mimics the `setstate` C++ implementation.
setattr(p, "__dict__", {}) # noqa: B010
data = pickle.dumps(p, pickle.HIGHEST_PROTOCOL)
p2 = pickle.loads(data)
assert isinstance(p2, m.SimpleBase)
assert p2.num == 404
# Issue #3062: pickleable base C++ classes can incur object slicing
# if derived typeid is not registered with pybind11
assert not m.check_dynamic_cast_SimpleCppDerived(p2)
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