1 files changed, 108 insertions, 0 deletions
diff --git a/lib/python2.7/json/tests/test_recursion.py b/lib/python2.7/json/tests/test_recursion.py
new file mode 100644
index 0000000..b5221e5
--- /dev/null
+++ b/lib/python2.7/json/tests/test_recursion.py
@@ -0,0 +1,108 @@
+from json.tests import PyTest, CTest
+
+
+class JSONTestObject:
+    pass
+
+
+class TestRecursion(object):
+    def test_listrecursion(self):
+        x = []
+        x.append(x)
+        try:
+            self.dumps(x)
+        except ValueError:
+            pass
+        else:
+            self.fail("didn't raise ValueError on list recursion")
+        x = []
+        y = [x]
+        x.append(y)
+        try:
+            self.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
+        self.dumps(x)
+
+    def test_dictrecursion(self):
+        x = {}
+        x["test"] = x
+        try:
+            self.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
+        self.dumps(x)
+
+    def test_defaultrecursion(self):
+        class RecursiveJSONEncoder(self.json.JSONEncoder):
+            recurse = False
+            def default(self, o):
+                if o is JSONTestObject:
+                    if self.recurse:
+                        return [JSONTestObject]
+                    else:
+                        return 'JSONTestObject'
+                return pyjson.JSONEncoder.default(o)
+
+        enc = RecursiveJSONEncoder()
+        self.assertEqual(enc.encode(JSONTestObject), '"JSONTestObject"')
+        enc.recurse = True
+        try:
+            enc.encode(JSONTestObject)
+        except ValueError:
+            pass
+        else:
+            self.fail("didn't raise ValueError on default recursion")
+
+
+    def test_highly_nested_objects_decoding(self):
+        # test that loading highly-nested objects doesn't segfault when C
+        # accelerations are used. See #12017
+        # str
+        with self.assertRaises(RuntimeError):
+            self.loads('{"a":' * 100000 + '1' + '}' * 100000)
+        with self.assertRaises(RuntimeError):
+            self.loads('{"a":' * 100000 + '[1]' + '}' * 100000)
+        with self.assertRaises(RuntimeError):
+            self.loads('[' * 100000 + '1' + ']' * 100000)
+        # unicode
+        with self.assertRaises(RuntimeError):
+            self.loads(u'{"a":' * 100000 + u'1' + u'}' * 100000)
+        with self.assertRaises(RuntimeError):
+            self.loads(u'{"a":' * 100000 + u'[1]' + u'}' * 100000)
+        with self.assertRaises(RuntimeError):
+            self.loads(u'[' * 100000 + u'1' + u']' * 100000)
+
+    def test_highly_nested_objects_encoding(self):
+        # See #12051
+        l, d = [], {}
+        for x in xrange(100000):
+            l, d = [l], {'k':d}
+        with self.assertRaises(RuntimeError):
+            self.dumps(l)
+        with self.assertRaises(RuntimeError):
+            self.dumps(d)
+
+    def test_endless_recursion(self):
+        # See #12051
+        class EndlessJSONEncoder(self.json.JSONEncoder):
+            def default(self, o):
+                """If check_circular is False, this will keep adding another list."""
+                return [o]
+
+        with self.assertRaises(RuntimeError):
+            EndlessJSONEncoder(check_circular=False).encode(5j)
+
+
+class TestPyRecursion(TestRecursion, PyTest): pass
+class TestCRecursion(TestRecursion, CTest): pass