Add comments to test traffic.

Author: acolomb

test/test_sdo.py

@@ -90,16 +90,16 @@ def test_expedited_upload(self):
 
         # UNSIGNED8 without padded data part (see issue #5)
         self.data = [
-            (TX, b'\x40\x00\x14\x02\x00\x00\x00\x00'),
-            (RX, b'\x4f\x00\x14\x02\xfe')
+            (TX, b'\x40\x00\x14\x02\x00\x00\x00\x00'),  # SDO upload 0x1400:02
+            (RX, b'\x4f\x00\x14\x02\xfe'),              # expedited, size=1
         ]
         trans_type = self.network[2].sdo[0x1400]['Transmission type RPDO 1'].raw
         self.assertEqual(trans_type, 254)
 
         # Same with padding to a full SDO frame
         self.data = [
-            (TX, b'\x40\x00\x14\x02\x00\x00\x00\x00'),
-            (RX, b'\x42\x00\x14\x02\xfe\x00\x00\x00')
+            (TX, b'\x40\x00\x14\x02\x00\x00\x00\x00'),  # SDO upload 0x1400:02
+            (RX, b'\x42\x00\x14\x02\xfe\x00\x00\x00'),  # expedited, no size indicated
         ]
         trans_type = self.network[2].sdo[0x1400]['Transmission type RPDO 1'].raw
         self.assertEqual(trans_type, 254)