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from __future__ import absolute_import
import unittest
import simplejson as json
from simplejson.compat import StringIO
try:
from collections import namedtuple
except ImportError:
class Value(tuple):
def __new__(cls, *args):
return tuple.__new__(cls, args)
def _asdict(self):
return {'value': self[0]}
class Point(tuple):
def __new__(cls, *args):
return tuple.__new__(cls, args)
def _asdict(self):
return {'x': self[0], 'y': self[1]}
else:
Value = namedtuple('Value', ['value'])
Point = namedtuple('Point', ['x', 'y'])
class DuckValue(object):
def __init__(self, *args):
self.value = Value(*args)
def _asdict(self):
return self.value._asdict()
class DuckPoint(object):
def __init__(self, *args):
self.point = Point(*args)
def _asdict(self):
return self.point._asdict()
class DeadDuck(object):
_asdict = None
class DeadDict(dict):
_asdict = None
CONSTRUCTORS = [
lambda v: v,
lambda v: [v],
lambda v: [{'key': v}],
]
class TestNamedTuple(unittest.TestCase):
def test_namedtuple_dumps(self):
for v in [Value(1), Point(1, 2), DuckValue(1), DuckPoint(1, 2)]:
d = v._asdict()
self.assertEqual(d, json.loads(json.dumps(v)))
self.assertEqual(
d,
json.loads(json.dumps(v, namedtuple_as_object=True)))
self.assertEqual(d, json.loads(json.dumps(v, tuple_as_array=False)))
self.assertEqual(
d,
json.loads(json.dumps(v, namedtuple_as_object=True,
tuple_as_array=False)))
def test_namedtuple_dumps_false(self):
for v in [Value(1), Point(1, 2)]:
l = list(v)
self.assertEqual(
l,
json.loads(json.dumps(v, namedtuple_as_object=False)))
self.assertRaises(TypeError, json.dumps, v,
tuple_as_array=False, namedtuple_as_object=False)
def test_namedtuple_dump(self):
for v in [Value(1), Point(1, 2), DuckValue(1), DuckPoint(1, 2)]:
d = v._asdict()
sio = StringIO()
json.dump(v, sio)
self.assertEqual(d, json.loads(sio.getvalue()))
sio = StringIO()
json.dump(v, sio, namedtuple_as_object=True)
self.assertEqual(
d,
json.loads(sio.getvalue()))
sio = StringIO()
json.dump(v, sio, tuple_as_array=False)
self.assertEqual(d, json.loads(sio.getvalue()))
sio = StringIO()
json.dump(v, sio, namedtuple_as_object=True,
tuple_as_array=False)
self.assertEqual(
d,
json.loads(sio.getvalue()))
def test_namedtuple_dump_false(self):
for v in [Value(1), Point(1, 2)]:
l = list(v)
sio = StringIO()
json.dump(v, sio, namedtuple_as_object=False)
self.assertEqual(
l,
json.loads(sio.getvalue()))
self.assertRaises(TypeError, json.dump, v, StringIO(),
tuple_as_array=False, namedtuple_as_object=False)
def test_asdict_not_callable_dump(self):
for f in CONSTRUCTORS:
self.assertRaises(TypeError,
json.dump, f(DeadDuck()), StringIO(), namedtuple_as_object=True)
sio = StringIO()
json.dump(f(DeadDict()), sio, namedtuple_as_object=True)
self.assertEqual(
json.dumps(f({})),
sio.getvalue())
def test_asdict_not_callable_dumps(self):
for f in CONSTRUCTORS:
self.assertRaises(TypeError,
json.dumps, f(DeadDuck()), namedtuple_as_object=True)
self.assertEqual(
json.dumps(f({})),
json.dumps(f(DeadDict()), namedtuple_as_object=True))