OpenStack Networking (Neutron)
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# Copyright 2014 Cisco Systems, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import random
from neutron.agent.linux import ovs_lib
from neutron.agent.linux import utils
from neutron.common import constants as n_const
from neutron.tests.functional import base as functional_base
BR_PREFIX = 'test-br'
class BaseLinuxTestCase(functional_base.BaseSudoTestCase):
def check_command(self, cmd, error_text, skip_msg, root_helper=None):
try:
utils.execute(cmd, root_helper=root_helper)
except RuntimeError as e:
if error_text in str(e) and not self.fail_on_missing_deps:
self.skipTest(skip_msg)
raise
def get_rand_name(self, max_length, prefix='test'):
name = prefix + str(random.randint(1, 0x7fffffff))
return name[:max_length]
def create_resource(self, name_prefix, creation_func, *args, **kwargs):
"""Create a new resource that does not already exist.
:param name_prefix: The prefix for a randomly generated name
:param creation_func: A function taking the name of the resource
to be created as it's first argument. An error is assumed
to indicate a name collision.
:param *args *kwargs: These will be passed to the create function.
"""
while True:
name = self.get_rand_name(n_const.DEVICE_NAME_MAX_LEN, name_prefix)
try:
return creation_func(name, *args, **kwargs)
except RuntimeError:
continue
class BaseOVSLinuxTestCase(BaseLinuxTestCase):
def setUp(self):
super(BaseOVSLinuxTestCase, self).setUp()
self.ovs = ovs_lib.BaseOVS(self.root_helper)
def create_ovs_bridge(self, br_prefix=BR_PREFIX):
br = self.create_resource(br_prefix, self.ovs.add_bridge)
self.addCleanup(br.destroy)
return br