def test_from_jsondata_unsupported_class():
class UnsupportedClass(object):
pass
with raises(ValueError) as excinfo:
from_jsondata(UnsupportedClass, {'some': 'test'})
assert str(excinfo.value).startswith('Unable to generate instance of ')
def test_from_jsondata_additional_fields():
NamedTupleA = NamedTuple('NamedTupleA', [
('a', str),
('b', datetime),
])
with raises(ValueError) as excinfo:
from_jsondata(NamedTupleA, {'a': 'test', 'b': None, 'c': None})
assert str(excinfo.value).startswith('Unable to generate instance of ')
def test_from_jsondata_ambiguous_union_type():
NamedTupleA = NamedTuple('NamedTupleA', [
('a', int),
])
OtherNamedTupleA = NamedTuple('NamedTupleA', [
('b', int),
])
NamedTupleC = NamedTuple('NamedTupleC', [
('c', Union[NamedTupleA, OtherNamedTupleA]),
])
with raises(ValueError) as excinfo:
from_jsondata(NamedTupleC, {'c': {'type': 'NamedTupleA'}})
assert str(excinfo.value).startswith('Multiple matching types for ')
def test_from_jsondata_missing_union_type():
NamedTupleA = NamedTuple('NamedTupleA', [
('a', int),
])
NamedTupleB = NamedTuple('NamedTupleB', [
('b', int),
])
NamedTupleC = NamedTuple('NamedTupleC', [
('c', Union[NamedTupleA, NamedTupleB]),
])
with raises(ValueError) as excinfo:
from_jsondata(NamedTupleC, {'c': {'type': 'NonExistingType'}})
assert str(excinfo.value).startswith('Unable to find type ')
def test_jsondata_empty():
NamedTupleEmpty = NamedTuple('NamedTupleEmpty', [])
class NamedTupleEmptySubClass(NamedTupleEmpty):
def submethod(self):
return True
value = NamedTupleEmptySubClass()
jsondata = {}
assert to_jsondata(value) == jsondata
generated_value = from_jsondata(NamedTupleEmptySubClass, jsondata)
assert isinstance(generated_value, NamedTupleEmptySubClass)
assert generated_value == value
def test_nonobject_from_jsondata_int():
assert from_jsondata(int, 2) == 2
def test_nonobject_from_jsondata_list():
assert from_jsondata(List[int], [1, 2, 3]) == [1, 2, 3]
def test_jsondata_roundtrip():
NamedTupleEmpty = NamedTuple('NamedTupleEmpty', [])
NamedTupleA = NamedTuple('NamedTupleA', [
('a', str),
])
NamedTupleB = NamedTuple('NamedTupleB', [
('a', int),
('b', bool),
])
NamedTupleC = NamedTuple('NamedTupleC', [
('a', int),
('b', bool),
('c', int),
('d', str),
('e', float),
('f', datetime),
('g', datetime),
('h', NamedTupleA),
('i', Union[NamedTupleA, NamedTupleB]),
('j', List[Union[NamedTupleA, NamedTupleB]]),
('k', NamedTupleEmpty),
('l', Union[NamedTupleEmpty, NamedTupleA, NamedTupleB]),
('m', timedelta),
('n', date),
('o', Dict[str, date]),
('p', datetime),
])
class NamedTupleCSubClass(NamedTupleC):
def submethod(self):
return True
value = NamedTupleCSubClass(
a=1,
b=True,
c=123456789012345678901234567890,
d='test\u00a7',
e=1.4,
f=datetime(2016, 7, 1, 18, 0, 28, 123456),
g=None,
h=NamedTupleA(a='sub', ),
i=NamedTupleA(a='sub in union', ),
j=[
NamedTupleA(a='sub in list of union', ),
NamedTupleB(
a=2,
b=False,
),
],
k=NamedTupleEmpty(),
l=NamedTupleEmpty(),
m=timedelta(minutes=10, microseconds=3),
n=date(2017, 1, 2),
o={
'2': date(2016, 1, 2),
'4': date(2016, 3, 4),
},
p=datetime(2017, 3, 6, 15, 1, 31, 0),
)
jsondata = {
'a':
1,
'b':
True,
'c':
123456789012345678901234567890,
'd':
'test\u00a7',
'e':
1.4,
'f':
'2016-07-01T18:00:28.123456Z',
'g':
None,
'h': {
'a': 'sub',
},
'i': {
'type': 'NamedTupleA',
'a': 'sub in union',
},
'j': [
{
'type': 'NamedTupleA',
'a': 'sub in list of union',
},
{
'type': 'NamedTupleB',
'a': 2,
'b': False,
},
],
'k': {},
'l': {
'type': 'NamedTupleEmpty',
},
'm':
600.000003,
'n':
'2017-01-02',
'o': {
'2': '2016-01-02',
'4': '2016-03-04',
},
'p':
'2017-03-06T15:01:31Z',
}
assert to_jsondata(value) == jsondata
generated_value = from_jsondata(NamedTupleCSubClass, jsondata)
assert isinstance(generated_value, NamedTupleCSubClass)
assert generated_value == value
def test_from_jsondata_unsupported_dict_key_type():
with raises(ValueError) as excinfo:
from_jsondata(Dict[int, str], {'some': 'test'})
assert str(excinfo.value) == 'Invalid key type for JSON object: int'
def test_from_jsondata_unsupported_nontype():
UnsupportedNonType = 42
with raises(ValueError) as excinfo:
from_jsondata(UnsupportedNonType, {'some': 'test'})
assert str(excinfo.value).startswith('Unable to generate instance of ')
def test_from_jsondata_unsupported_type_list():
with raises(ValueError) as excinfo:
from_jsondata(list, {})
assert str(excinfo.value).startswith('Unable to generate instance of ')