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# stdlib
from typing import Dict, List
# 3rd party
import pytest
from coincidence.selectors import not_pypy
# this package
import sdjson
class JSONTestObject:
pass
def test_listrecursion() -> None:
x: List[List] = []
x.append(x)
try:
sdjson.dumps(x)
except ValueError:
pass
else:
pytest.fail("didn't raise ValueError on list recursion")
x = []
y = [x]
x.append(y)
try:
sdjson.dumps(x)
except ValueError:
pass
else:
pytest.fail("didn't raise ValueError on alternating list recursion")
y = []
x = [y, y]
# ensure that the marker is cleared
sdjson.dumps(x)
def test_dictrecursion() -> None:
x: Dict[str, Dict] = {}
x["test"] = x
try:
sdjson.dumps(x)
except ValueError:
pass
else:
pytest.fail("didn't raise ValueError on dict recursion")
x = {}
y = {'a': x, 'b': x}
# ensure that the marker is cleared
sdjson.dumps(x)
def test_defaultrecursion() -> None:
class RecursiveJSONEncoder(sdjson.JSONEncoder):
recurse = False
def default(self, o: object):
if o is JSONTestObject:
if self.recurse:
return [JSONTestObject]
else:
return "JSONTestObject"
return sdjson.JSONEncoder.default(self, o)
enc = RecursiveJSONEncoder()
assert enc.encode(JSONTestObject) == '"JSONTestObject"'
enc.recurse = True
try:
enc.encode(JSONTestObject)
except ValueError:
pass
else:
pytest.fail("didn't raise ValueError on default recursion")
def test_highly_nested_objects_decoding() -> None:
# test that loading highly-nested objects doesn't segfault when C
# accelerations are used. See #12017
with pytest.raises(RecursionError):
sdjson.loads('{"a":' * 100000 + '1' + '}' * 100000)
with pytest.raises(RecursionError):
sdjson.loads('{"a":' * 100000 + "[1]" + '}' * 100000)
with pytest.raises(RecursionError):
sdjson.loads('[' * 100000 + '1' + ']' * 100000)
@not_pypy("Breaks coverage tracing on PyPy")
def test_highly_nested_objects_encoding() -> None:
# See #12051
l: List[List]
d: Dict[str, Dict]
l, d = [], {}
for x in range(100000):
l, d = [l], {'k': d}
with pytest.raises(RecursionError):
sdjson.dumps(l)
with pytest.raises(RecursionError):
sdjson.dumps(d)
@not_pypy("Breaks coverage tracing on PyPy")
def test_endless_recursion() -> None:
# See #12051
class EndlessJSONEncoder(sdjson.JSONEncoder):
def default(self, o: object) -> List:
"""
If check_circular is False, this will keep adding another list.
"""
return [o]
with pytest.raises(RecursionError):
EndlessJSONEncoder(check_circular=False).encode(5j)
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