Test for PDO access by nonexistant communication parameter index.

Must raise a KeyError, but currently does not.

Author: acolomb

test/test_pdo.py

@@ -80,6 +80,7 @@ def test_pdo_getitem(self):
         self.assertRaises(KeyError, lambda: node.pdo['DOES NOT EXIST'])
         self.assertRaises(KeyError, lambda: node.pdo[0x1BFF])
         self.assertRaises(KeyError, lambda: node.tpdo[0x1BFF])
+        self.assertRaises(KeyError, lambda: node.pdo[0x15FF])
 
     def test_pdo_iterate(self):
         node = self.node