From 69362215b2fbaf7617c989ef2538d01ad8130db2 Mon Sep 17 00:00:00 2001
From: Vincent Bernat <vincent@bernat.ch>
Date: Wed, 20 Nov 2019 11:33:51 +0100
Subject: [PATCH] tests: add a test with different MTU interfaces

See #365.
---
 tests/integration/fixtures/network.py | 10 +++++++---
 tests/integration/test_basic.py       | 14 ++++++++++++++
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/tests/integration/fixtures/network.py b/tests/integration/fixtures/network.py
index f867ea5a..c4be4802 100644
--- a/tests/integration/fixtures/network.py
+++ b/tests/integration/fixtures/network.py
@@ -27,10 +27,10 @@ class LinksFactory(object):
         self.ns = Namespace('net')
         self.count = 0
 
-    def __call__(self, *args):
-        return self.veth(*args)
+    def __call__(self, *args, **kwargs):
+        return self.veth(*args, **kwargs)
 
-    def veth(self, ns1, ns2, sleep=0):
+    def veth(self, ns1, ns2, sleep=0, mtu=1500):
         """Create a veth pair between two namespaces."""
         with self.ns:
             # First, create a link
@@ -50,6 +50,10 @@ class LinksFactory(object):
             ipr.link('set', index=idx[1],
                      address=int_to_mac(self.count + 2))
 
+            # Set MTU
+            ipr.link('set', index=idx[0], mtu=mtu)
+            ipr.link('set', index=idx[1], mtu=mtu)
+
             # Then, move each to the target namespace
             ipr.link('set', index=idx[0], net_ns_fd=ns1.fd('net'))
             ipr.link('set', index=idx[1], net_ns_fd=ns2.fd('net'))
diff --git a/tests/integration/test_basic.py b/tests/integration/test_basic.py
index 89d98756..cb4b91d6 100644
--- a/tests/integration/test_basic.py
+++ b/tests/integration/test_basic.py
@@ -73,6 +73,7 @@ def test_one_interface(lldpd1, lldpd, lldpcli, namespaces):
                        "lldp.eth0.port.descr": "eth0",
                        "lldp.eth0.ttl.ttl": "120"}
 
+
 @pytest.mark.parametrize("interfaces", (5, 10, 20))
 def test_several_interfaces(lldpd, lldpcli, links, namespaces, interfaces):
     for i in range(2, interfaces + 1):
@@ -89,6 +90,19 @@ def test_several_interfaces(lldpd, lldpcli, links, namespaces, interfaces):
                 '00:00:00:00:00:{num:02x}'.format(num=(i - 2)*2 + 1)
 
 
+def test_different_mtu(lldpd, lldpcli, links, namespaces):
+    links(namespaces(1), namespaces(2), mtu=1500)
+    links(namespaces(1), namespaces(2), mtu=9000)
+    with namespaces(1):
+        lldpd()
+    with namespaces(2):
+        lldpd()
+    with namespaces(1):
+        out = lldpcli("-f", "keyvalue", "show", "interfaces")
+        assert out['lldp.eth0.chassis.mac'] == '00:00:00:00:00:01'
+        assert out['lldp.eth2.chassis.mac'] == '00:00:00:00:00:01'
+
+
 def test_overrided_description(lldpd1, lldpd, lldpcli, namespaces):
     with namespaces(2):
         lldpd("-S", "Modified description")
-- 
2.39.2