Add test with catastrophic backtracking

colander/tests/test_colander.py

@@ -648,6 +648,20 @@ def test_it_failure(self):
 
         self.assertRaises(Invalid, self._callFUT, val)
 
+    def test_add_sample_dos(self):
+        # In the old regex this would cause a catastrophic backtracking that
+        # would cause the regex engine to go into an infinite loop.
+        val = "http://www.mysite.com/(tttttttttttttttttttttt.jpg"
+
+        result = self._callFUT(val)
+        self.assertEqual(result, None)
+
+    def test_website_no_scheme(self):
+        val = "www.mysite.com"
+
+        result = self._callFUT(val)
+        self.assertEqual(result, None)
+
 
 class TestUUID(unittest.TestCase):
     def _callFUT(self, val):