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import decimal
from hashlib import md5
from warnings import warn
import pytest
from helper import SkippableTest
import jsonpickle
class Thing:
def __init__(self, name):
self.name = name
self.child = None
class A:
def __init__(self):
self.id = md5(str(id(self)).encode()).hexdigest()[:5] # unique enough hash
class BSlots:
__slots__ = ["a2", "a1", "a3"]
def __init__(self):
self.a2 = A() # set attribs not in alphabetical order
self.a1 = A()
self.a3 = self.a1 # create a reference
SAMPLE_DATA = {'things': [Thing('data')]}
class BackendBase(SkippableTest):
def _is_installed(self, backend):
if not jsonpickle.util.is_installed(backend):
return self.skip('%s not available; please install' % backend)
def set_backend(self, *args):
backend = args[0]
self._is_installed(backend)
jsonpickle.load_backend(*args)
jsonpickle.set_preferred_backend(backend)
def set_preferred_backend(self, backend):
self._is_installed(backend)
jsonpickle.set_preferred_backend(backend)
def tearDown(self):
# always reset to default backend
jsonpickle.set_preferred_backend('json')
def assert_roundtrip(self, json_input):
expect = SAMPLE_DATA
actual = jsonpickle.decode(json_input)
assert expect['things'][0].name == actual['things'][0].name
assert expect['things'][0].child == actual['things'][0].child
pickled = jsonpickle.encode(SAMPLE_DATA)
actual = jsonpickle.decode(pickled)
assert expect['things'][0].name == actual['things'][0].name
assert expect['things'][0].child == actual['things'][0].child
def test_None_dict_key(self):
"""Ensure that backends produce the same result for None dict keys"""
data = {None: None}
expect = {'null': None}
pickle = jsonpickle.encode(data)
actual = jsonpickle.decode(pickle)
assert expect == actual
def test_encode_with_indent_and_separators(self):
obj = {
'a': 1,
'b': 2,
}
expect = '{\n' ' "a": 1,\n' ' "b": 2\n' '}'
actual = jsonpickle.encode(obj, indent=4, separators=(',', ': '))
assert expect == actual
class JsonTestCase(BackendBase):
def setUp(self):
self.set_preferred_backend('json')
def test_backend(self):
expected_pickled = (
'{"things": [{'
'"py/object": "backend_test.Thing", '
'"name": "data", '
'"child": null} '
']}'
)
self.assert_roundtrip(expected_pickled)
class SimpleJsonTestCase(BackendBase):
def setUp(self):
self.set_preferred_backend('simplejson')
def test_backend(self):
expected_pickled = (
'{"things": [{'
'"py/object": "backend_test.Thing", '
'"name": "data", '
'"child": null}'
']}'
)
self.assert_roundtrip(expected_pickled)
def test_decimal(self):
# Default behavior: Decimal is preserved
obj = decimal.Decimal(0.5)
as_json = jsonpickle.dumps(obj)
clone = jsonpickle.loads(as_json)
assert isinstance(clone, decimal.Decimal)
assert obj == clone
# Custom behavior: we want to use simplejson's Decimal support.
jsonpickle.set_encoder_options('simplejson', use_decimal=True, sort_keys=True)
jsonpickle.set_decoder_options('simplejson', use_decimal=True)
# use_decimal mode allows Decimal objects to pass-through to simplejson.
# The end result is we get a simple '0.5' value as our json string.
as_json = jsonpickle.dumps(obj, unpicklable=True, use_decimal=True)
assert as_json == '0.5'
# But when loading we get back a Decimal.
clone = jsonpickle.loads(as_json)
assert isinstance(clone, decimal.Decimal)
# side-effect: floats become decimals too!
obj = 0.5
as_json = jsonpickle.dumps(obj)
clone = jsonpickle.loads(as_json)
assert isinstance(clone, decimal.Decimal)
# options are persisted unless we disable them
jsonpickle.set_encoder_options('simplejson', use_decimal=False)
jsonpickle.set_decoder_options('simplejson', use_decimal=False)
def test_sort_keys(self):
jsonpickle.set_encoder_options('simplejson', sort_keys=True)
b = BSlots()
with pytest.raises(TypeError):
jsonpickle.encode(b, keys=True, warn=True)
# return encoder options to default
jsonpickle.set_encoder_options('simplejson', sort_keys=False)
def has_module(module):
try:
__import__(module)
except ImportError:
warn(module + ' module not available for testing, ' 'consider installing')
return False
return True
class UJsonTestCase(BackendBase):
def setUp(self):
self.set_preferred_backend('ujson')
def test_backend(self):
expected_pickled = (
'{"things":[{'
r'"py\/object":"backend_test.Thing",'
'"name":"data","child":null}'
']}'
)
self.assert_roundtrip(expected_pickled)
class YamlTestCase(BackendBase):
def setUp(self):
self.set_preferred_backend('yaml')
def test_backend(self):
expected_pickled = (
'things:\n'
' - py/object: backend_test.Thing\n'
' name: data\n'
' child: null\n'
)
self.assert_roundtrip(expected_pickled)
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