initial
diff --git a/simplejson/tests/test_recursion.py b/simplejson/tests/test_recursion.py
new file mode 100644
index 0000000..97422a6
--- /dev/null
+++ b/simplejson/tests/test_recursion.py
@@ -0,0 +1,67 @@
+from unittest import TestCase
+
+import simplejson as json
+
+class JSONTestObject:
+ pass
+
+
+class RecursiveJSONEncoder(json.JSONEncoder):
+ recurse = False
+ def default(self, o):
+ if o is JSONTestObject:
+ if self.recurse:
+ return [JSONTestObject]
+ else:
+ return 'JSONTestObject'
+ return json.JSONEncoder.default(o)
+
+
+class TestRecursion(TestCase):
+ def test_listrecursion(self):
+ x = []
+ x.append(x)
+ try:
+ json.dumps(x)
+ except ValueError:
+ pass
+ else:
+ self.fail("didn't raise ValueError on list recursion")
+ x = []
+ y = [x]
+ x.append(y)
+ try:
+ json.dumps(x)
+ except ValueError:
+ pass
+ else:
+ self.fail("didn't raise ValueError on alternating list recursion")
+ y = []
+ x = [y, y]
+ # ensure that the marker is cleared
+ json.dumps(x)
+
+ def test_dictrecursion(self):
+ x = {}
+ x["test"] = x
+ try:
+ json.dumps(x)
+ except ValueError:
+ pass
+ else:
+ self.fail("didn't raise ValueError on dict recursion")
+ x = {}
+ y = {"a": x, "b": x}
+ # ensure that the marker is cleared
+ json.dumps(x)
+
+ def test_defaultrecursion(self):
+ enc = RecursiveJSONEncoder()
+ self.assertEquals(enc.encode(JSONTestObject), '"JSONTestObject"')
+ enc.recurse = True
+ try:
+ enc.encode(JSONTestObject)
+ except ValueError:
+ pass
+ else:
+ self.fail("didn't raise ValueError on default recursion")