def test_nested_dataclass_caches_both_classes(self):
json_dataclass_with_dataclass = '{"dc_with_list": {"xs": [1]}}'
_ = DataClassWithDataClass.from_json(json_dataclass_with_dataclass)
assert _get_type_hints_cache._Cache__currsize == 2
# supported generic called for List[int] and int
assert _is_supported_generic_cache._Cache__currsize == 2
# for the dataclasses
assert _user_overrides_cache._Cache__currsize == 2
# force cache_hit
_ = DataClassWithDataClass.from_json(json_dataclass_with_dataclass)
assert _get_type_hints_cache._Cache__currsize == 2
assert _is_supported_generic_cache._Cache__currsize == 2
assert _user_overrides_cache._Cache__currsize == 2
def test_error_when_nonoptional_field_is_missing(self):
with pytest.raises(KeyError):
actual = DataClassWithDataClass.from_json('{"dc_with_list": {}}')
expected = DataClassWithDataClass(DataClassWithList(None))
assert (actual == expected)
def test_warns_when_required_field_is_none(self):
with pytest.warns(RuntimeWarning, match='`NoneType` object'):
assert (DataClassWithDataClass.from_json('{"dc_with_list": null}')
== DataClassWithDataClass(None))
def test_warns_when_nonoptional_field_is_missing_with_infer_missing(self):
with pytest.warns(RuntimeWarning, match='Missing value'):
actual = DataClassWithDataClass.from_json('{"dc_with_list": {}}',
infer_missing=True)
expected = DataClassWithDataClass(DataClassWithList(None))
assert (actual == expected)
def test_nested_dataclass(self):
assert (DataClassWithDataClass.from_json(
'{"dc_with_list": {"xs": [1]}}') == DataClassWithDataClass(
DataClassWithList([1])))
def test_warns_when_required_field_is_none(self):
with pytest.warns(RuntimeWarning, match='None value'):
assert (DataClassWithDataClass.from_json('{"xs": null}') ==
DataClassWithDataClass(None))