test-network: add a test case for FQ

test/test-network/conf/25-qdisc-fq.network

@@ -0,0 +1,10 @@
+[Match]
+Name=dummy98
+
+[Network]
+IPv6AcceptRA=no
+Address=10.1.2.3/16
+
+[TrafficControlQueueingDiscipline]
+Parent=root
+FairQueueTrafficPolicingPacketLimit=1000

test/test-network/systemd-networkd-tests.py

@@ -1509,6 +1509,7 @@ class NetworkdNetworkTests(unittest.TestCase, Utilities):
         '25-neighbor-ip-dummy.network',
         '25-neighbor-ip.network',
         '25-nexthop.network',
+        '25-qdisc-fq.network',
         '25-qdisc-netem-and-fqcodel.network',
         '25-qdisc-tbf-and-sfq.network',
         '25-route-ipv6-src.network',
@@ -2102,6 +2103,17 @@ class NetworkdNetworkTests(unittest.TestCase, Utilities):
         self.assertRegex(output, 'qdisc sfq')
         self.assertRegex(output, 'perturb 5sec')
 
+    def test_qdisc2(self):
+        copy_unit_to_networkd_unit_path('25-qdisc-fq.network', '12-dummy.netdev')
+        start_networkd()
+
+        self.wait_online(['dummy98:routable'])
+
+        output = check_output('tc qdisc show dev dummy98')
+        print(output)
+        self.assertRegex(output, 'qdisc fq')
+        self.assertRegex(output, 'limit 1000p')
+
 class NetworkdStateFileTests(unittest.TestCase, Utilities):
     links = [
         'dummy98',