def test_get_cls_from_str(self):
self.assertEqual(str, get_cls_from_str('str', {}, None))
self.assertEqual(int, get_cls_from_str('int', {}, None))
self.assertEqual(list, get_cls_from_str('list', {}, None))
class C:
pass
jsons.announce_class(C, 'NonExisting')
self.assertEqual(C, get_cls_from_str('NonExisting', {}, StateHolder))
def test_load_object_without_type_hints_verbose(self):
class A:
def __init__(self, x):
self.x = x
class B:
def __init__(self, a: A):
self.a = a
class C:
def __init__(self, b: B):
self.b = b
dumped1 = {
'b': {
'a': {
'x': 42
}
},
'-meta': {
'classes': {
'/': 'jsons.C',
'/b': 'jsons.B',
'/b/a': 'jsons.A'
}
}
}
# Place the classes where they can be found.
jsons.A = A
jsons.B = B
jsons.C = C
loaded = jsons.load(dumped1)
# Clean it up again...
del jsons.A
del jsons.B
del jsons.C
self.assertEqual(42, loaded.b.a.x)
# Now let's test what happens when we try to load an unknown class.
dumped2 = {'x': 100, '-meta': {'classes': {'/': 'custom_class'}}}
with self.assertRaises(UnknownClassError):
jsons.load(dumped2)
try:
jsons.load(dumped2)
except UnknownClassError as err:
self.assertEqual('custom_class', err.target_name)
# Now announce the class and try again; it should work now.
jsons.announce_class(A, 'custom_class')
loaded2 = jsons.load(dumped2)
self.assertEqual(100, loaded2.x)
def _do_serialize(
obj: object,
cls: type,
attributes: Dict[str, Optional[type]],
kwargs: dict,
key_transformer: Optional[Callable[[str], str]] = None,
strip_nulls: bool = False,
strip_privates: bool = False,
strip_properties: bool = False,
strip_class_variables: bool = False,
strip_attr: Union[str, MutableSequence[str], Tuple[str]] = None,
strict: bool = False,
fork_inst: Optional[type] = StateHolder) -> Dict[str, object]:
result = dict()
is_attrs_cls = getattr(cls, '__attrs_attrs__', None) is not None
make_attributes_public = is_attrs_cls and not strip_privates
for attr_name, cls_ in attributes.items():
attr = getattr(obj, attr_name)
attr_type = cls_ or type(attr)
announce_class(attr_type, fork_inst=fork_inst)
serializer = get_serializer(attr_type, fork_inst)
try:
dumped_elem = serializer(
attr,
cls=cls_,
key_transformer=key_transformer,
strip_nulls=strip_nulls,
strip_privates=strip_privates,
strip_properties=strip_properties,
strip_class_variables=strip_class_variables,
strip_attr=strip_attr,
**kwargs)
_store_cls_info(dumped_elem, attr, kwargs)
except Exception as err:
if strict:
raise SerializationError(message=err.args[0]) from err
else:
fork_inst._warn(
'Failed to dump attribute "{}" of object of '
'type "{}". Reason: {}. Ignoring the '
'attribute.'.format(attr, get_class_name(cls),
err.args[0]),
'attribute-not-serialized')
break
if make_attributes_public:
attr_name = attr_name.lstrip('_')
_add_dumped_elem(result, attr_name, dumped_elem, strip_nulls,
key_transformer)
return result
def test_load_object_verbose(self):
class BarBase:
pass
class BarA(BarBase):
def __init__(self, a: int):
self.a = a
class BarB(BarBase):
def __init__(self, b: int):
self.b = b
class Foo(BarBase):
def __init__(self, bar: BarBase):
self.bar = bar
jsons.announce_class(Foo)
jsons.announce_class(BarA)
jsons.announce_class(BarB)
jsons.announce_class(BarBase)
foo = Foo(bar=BarA(a=5))
dumped = jsons.dump(foo, verbose=True)
loaded = jsons.load(dumped)
self.assertTrue(isinstance(loaded, Foo))
self.assertTrue(isinstance(loaded.bar, BarA))
def test_dump_object_verbose(self):
class A:
def __init__(self, x):
self.x = x
class B:
def __init__(self, a: A):
self.a = a
class C:
def __init__(self, b: B):
self.b = b
c = C(B(A(42)))
dumped = jsons.dump(c, verbose=jsons.Verbosity.WITH_CLASS_INFO)
expectation = {
'classes': {
'/': 'tests.test_object.C',
'/b': 'tests.test_object.B',
'/b/a': 'tests.test_object.A'
}
}
self.assertDictEqual(expectation, dumped['-meta'])
# Now customize the name of the B class.
jsons.announce_class(B, 'custom_name')
expectation2 = {
'classes': {
'/': 'tests.test_object.C',
'/b': 'custom_name',
'/b/a': 'tests.test_object.A'
}
}
dumped2 = jsons.dump(c, verbose=jsons.Verbosity.WITH_CLASS_INFO)
self.assertDictEqual(expectation2, dumped2['-meta'])
dumped3 = jsons.dump(c, verbose=jsons.Verbosity.WITH_NOTHING)
self.assertDictEqual({'b': {'a': {'x': 42}}}, dumped3)
dumped4 = jsons.dump(c, verbose=jsons.Verbosity.WITH_DUMP_TIME)
self.assertTrue('dump_time' in dumped4['-meta'])
self.assertTrue('classes' not in dumped4['-meta'])
dumped5 = jsons.dump(c, verbose=jsons.Verbosity.WITH_EVERYTHING)
self.assertTrue('dump_time' in dumped5['-meta'])
self.assertTrue('classes' in dumped5['-meta'])
def test_dump_load_list_verbose(self):
class Parent:
pass
class Child(Parent):
pass
class Store:
def __init__(self, c2s: List[Parent]):
self.c2s = c2s
jsons.announce_class(Parent)
jsons.announce_class(Child)
jsons.announce_class(Store)
s = Store([Child()])
dumped = jsons.dump(s, verbose=True)
loaded = jsons.load(dumped)
self.assertEqual(Child, type(loaded.c2s[0]))