test_vsctl: Wait for loading OVS kernel module

If the OVS kernel module is loaded at first time, it might take
a few seconds.
This patch add a sleep before sending OVSDB requests.

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

.travis.yml

@@ -16,7 +16,6 @@ sudo: required  # Required to enable Docker service
 
 install:
   - docker build -t ut_mininet ryu/tests/docker/mininet/
-  - CID=`docker run --privileged -t -d ut_mininet`; docker rm -f $CID  # Test container
   - pip install tox coveralls
 
 script:

ryu/tests/unit/lib/ovs/test_vsctl.py

@@ -21,6 +21,7 @@ import unittest
 from nose.tools import eq_
 from nose.tools import ok_
 
+from ryu.lib.hub import sleep
 from ryu.lib.ovs import vsctl
 
 
@@ -89,6 +90,11 @@ class TestVSCtl(unittest.TestCase):
         cls.container_mn = cls._docker_run(DOCKER_IMAGE_MININET)
         cls.container_mn_ip = cls._docker_inspect_ip_addr(cls.container_mn)
 
+        # Note: Wait for loading the OVS kernel module.
+        # If the OVS kernel module is loaded at first time, it might take
+        # a few seconds.
+        sleep(5)
+
         cls._docker_exec_mn(
             'ovs-vsctl set-manager %s' % OVSDB_MANAGER_ADDR)