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import simplejson
def test_listrecursion():
x = []
x.append(x)
try:
simplejson.dumps(x)
except ValueError:
pass
else:
assert False, "didn't raise ValueError on list recursion"
x = []
y = [x]
x.append(y)
try:
simplejson.dumps(x)
except ValueError:
pass
else:
assert False, "didn't raise ValueError on alternating list recursion"
y = []
x = [y, y]
# ensure that the marker is cleared
simplejson.dumps(x)
def test_dictrecursion():
x = {}
x["test"] = x
try:
simplejson.dumps(x)
except ValueError:
pass
else:
assert False, "didn't raise ValueError on dict recursion"
x = {}
y = {"a": x, "b": x}
# ensure that the marker is cleared
simplejson.dumps(x)
class TestObject:
pass
class RecursiveJSONEncoder(simplejson.JSONEncoder):
recurse = False
def default(self, o):
if o is TestObject:
if self.recurse:
return [TestObject]
else:
return 'TestObject'
simplejson.JSONEncoder.default(o)
def test_defaultrecursion():
enc = RecursiveJSONEncoder()
assert enc.encode(TestObject) == '"TestObject"'
enc.recurse = True
try:
enc.encode(TestObject)
except ValueError:
pass
else:
assert False, "didn't raise ValueError on default recursion"
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