Iterator interface had inappropriate self args.

lib/python/ZPublisher/Iterators.py

@@ -14,13 +14,13 @@ class IStreamIterator(Interface):
     but it has a chance of going insane if it happens to be loading 
     or storing something in the other thread at the same time.                      """
 
-    def next(self):
+    def next():
         """
         Return a sequence of bytes out of the bytestream, or raise
         StopIeration if we've reached the end of the bytestream.
         """
 
-    def __len__(self):
+    def __len__():
         """
         Return an integer representing the length of the object
         in bytes.

lib/python/ZPublisher/tests/testIterators.py

+import unittest
+from Interface.Verify import verifyClass
+from ZPublisher.Iterators import IStreamIterator, filestream_iterator
+
+class TestFileStreamIterator(unittest.TestCase):
+    def testInterface(self):
+        verifyClass(IStreamIterator, filestream_iterator)
+
+def test_suite():
+    suite = unittest.TestSuite()
+    suite.addTest( unittest.makeSuite( TestFileStreamIterator ) )
+    return suite
+
+def main():
+    unittest.main(defaultTest='test_suite')
+
+if __name__ == '__main__':
+    main()