68 lines
1.6 KiB
Python
68 lines
1.6 KiB
Python
from unittest import TestCase
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import simplejson as 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 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(y)
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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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