test: fix TypeError: non-ordered lists cannot be accessed by index

Signed-off-by: Joachim Wiberg <[email protected]>

Author: troglobit

test/case/infix_firewall/wan-dmz-lan/test.py

@@ -181,7 +181,8 @@ def debug(msg):
         assert wan_zone["action"] == "drop"
         assert wan_if in wan_zone["interface"]
         assert len(wan_zone["port-forward"]) == 1
-        pf = wan_zone["port-forward"][0]
+        # Access port-forward by iterating over the keyed list
+        pf = next(iter(wan_zone["port-forward"]))
         assert pf["lower"] == 8080
         assert pf["to"]["addr"] == DMZ_SERVER_IP
         assert pf["to"]["port"] == 80