99 lines
2.7 KiB
Python
99 lines
2.7 KiB
Python
from unittest import TestCase
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import json
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class JSONTestObject:
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pass
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class RecursiveJSONEncoder(json.JSONEncoder):
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recurse = False
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def default(self, o):
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if o is JSONTestObject:
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if self.recurse:
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return [JSONTestObject]
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else:
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return 'JSONTestObject'
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return json.JSONEncoder.default(o)
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class EndlessJSONEncoder(json.JSONEncoder):
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def default(self, o):
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"""If check_circular is False, this will keep adding another list."""
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return [o]
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class TestRecursion(TestCase):
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def test_listrecursion(self):
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x = []
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x.append(x)
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try:
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json.dumps(x)
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except ValueError:
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pass
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else:
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self.fail("didn't raise ValueError on list recursion")
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x = []
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y = [x]
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x.append(y)
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try:
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json.dumps(x)
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except ValueError:
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pass
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else:
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self.fail("didn't raise ValueError on alternating list recursion")
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y = []
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x = [y, y]
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# ensure that the marker is cleared
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json.dumps(x)
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def test_dictrecursion(self):
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x = {}
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x["test"] = x
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try:
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json.dumps(x)
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except ValueError:
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pass
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else:
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self.fail("didn't raise ValueError on dict recursion")
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x = {}
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y = {"a": x, "b": x}
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# ensure that the marker is cleared
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json.dumps(x)
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def test_defaultrecursion(self):
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enc = RecursiveJSONEncoder()
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self.assertEqual(enc.encode(JSONTestObject), '"JSONTestObject"')
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enc.recurse = True
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try:
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enc.encode(JSONTestObject)
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except ValueError:
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pass
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else:
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self.fail("didn't raise ValueError on default recursion")
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def test_highly_nested_objects_decoding(self):
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# test that loading highly-nested objects doesn't segfault when C
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# accelerations are used. See #12017
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with self.assertRaises(RuntimeError):
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json.loads('{"a":' * 100000 + '1' + '}' * 100000)
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with self.assertRaises(RuntimeError):
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json.loads('{"a":' * 100000 + '[1]' + '}' * 100000)
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with self.assertRaises(RuntimeError):
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json.loads('[' * 100000 + '1' + ']' * 100000)
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def test_highly_nested_objects_encoding(self):
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# See #12051
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l, d = [], {}
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for x in range(100000):
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l, d = [l], {'k':d}
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with self.assertRaises(RuntimeError):
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json.dumps(l)
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with self.assertRaises(RuntimeError):
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json.dumps(d)
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def test_endless_recursion(self):
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# See #12051
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with self.assertRaises(RuntimeError):
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EndlessJSONEncoder(check_circular=False).encode(5j)
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