--- a/python/testpyy.py	Wed May 29 22:36:37 2013 +0200
+++ b/python/testpyy.py	Fri May 31 21:06:44 2013 +0200
@@ -48,7 +48,7 @@
         g.start_symbol = 'stmt'
         p = g.genParser()
         # Ambiguous program:
-        tokens = genTokens(['if', 'then','if', 'then', 'ass', 'else', 'ass' ])
+        tokens = genTokens(['if', 'then','if', 'then', 'ass', 'else', 'ass'])
         p.parse(tokens)
 
     def testUndefinedTerminal(self):
@@ -104,6 +104,22 @@
         tokens = genTokens(['id', 'id'])   # i.e. "inc rax"
         p.parse(tokens)
 
+    def test_cb(self):
+        """ Test callback of one rule and order or parameters """
+        self.cb_called = False
+        def cb(a, c, b):
+            self.cb_called = True
+            self.assertEqual(a, 'a')
+            self.assertEqual(b, 'b')
+            self.assertEqual(c, 'c')
+        g = Grammar(['a', 'b', 'c'])
+        g.add_production('goal', ['a', 'c', 'b'], cb)
+        g.start_symbol = 'goal'
+        p = g.genParser()
+        tokens = genTokens(['a', 'c', 'b'])
+        p.parse(tokens)
+        self.assertTrue(self.cb_called)
+
 
 class testExpressionGrammar(unittest.TestCase):
     def setUp(self):