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# Copyright 2014 Microsoft Corporation
#
# 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.
#
# Requires Python 2.4+ and Openssl 1.0+
#
import mock
import azurelinuxagent.common.dhcp as dhcp
import azurelinuxagent.common.osutil.default as osutil
from tests.tools import *
class TestDHCP(AgentTestCase):
def test_wireserver_route_exists(self):
# setup
dhcp_handler = dhcp.get_dhcp_handler()
self.assertTrue(dhcp_handler.endpoint is None)
self.assertTrue(dhcp_handler.routes is None)
self.assertTrue(dhcp_handler.gateway is None)
# execute
routing_table = "\
Iface Destination Gateway Flags RefCnt Use Metric " \
"Mask MTU Window IRTT \n\
eth0 00000000 10813FA8 0003 0 0 5 " \
"00000000 0 0 0 \n\
eth0 00345B0A 00000000 0001 0 0 5 " \
"00000000 0 0 0 \n\
lo 00000000 01345B0A 0003 0 0 1 " \
"00FCFFFF 0 0 0 \n"
with patch("os.path.exists", return_value=True):
mo = mock.mock_open(read_data=routing_table)
with patch(open_patch(), mo):
self.assertTrue(dhcp_handler.wireserver_route_exists)
# test
self.assertTrue(dhcp_handler.endpoint is not None)
self.assertTrue(dhcp_handler.routes is None)
self.assertTrue(dhcp_handler.gateway is None)
def test_wireserver_route_not_exists(self):
# setup
dhcp_handler = dhcp.get_dhcp_handler()
self.assertTrue(dhcp_handler.endpoint is None)
self.assertTrue(dhcp_handler.routes is None)
self.assertTrue(dhcp_handler.gateway is None)
# execute
self.assertFalse(dhcp_handler.wireserver_route_exists)
# test
self.assertTrue(dhcp_handler.endpoint is None)
self.assertTrue(dhcp_handler.routes is None)
self.assertTrue(dhcp_handler.gateway is None)
def test_dhcp_cache_exists(self):
dhcp_handler = dhcp.get_dhcp_handler()
dhcp_handler.osutil = osutil.DefaultOSUtil()
with patch.object(osutil.DefaultOSUtil, 'get_dhcp_lease_endpoint',
return_value=None):
self.assertFalse(dhcp_handler.dhcp_cache_exists)
self.assertEqual(dhcp_handler.endpoint, None)
with patch.object(osutil.DefaultOSUtil, 'get_dhcp_lease_endpoint',
return_value="foo"):
self.assertTrue(dhcp_handler.dhcp_cache_exists)
self.assertEqual(dhcp_handler.endpoint, "foo")
def test_dhcp_skip_cache(self):
handler = dhcp.get_dhcp_handler()
handler.osutil = osutil.DefaultOSUtil()
with patch('os.path.exists', return_value=False):
with patch.object(osutil.DefaultOSUtil, 'get_dhcp_lease_endpoint')\
as patch_dhcp_cache:
with patch.object(dhcp.DhcpHandler, 'send_dhcp_req') \
as patch_dhcp_send:
endpoint = 'foo'
patch_dhcp_cache.return_value = endpoint
# endpoint comes from cache
self.assertFalse(handler.skip_cache)
handler.run()
self.assertTrue(patch_dhcp_cache.call_count == 1)
self.assertTrue(patch_dhcp_send.call_count == 0)
self.assertTrue(handler.endpoint == endpoint)
# reset
handler.skip_cache = True
handler.endpoint = None
# endpoint comes from dhcp request
self.assertTrue(handler.skip_cache)
handler.run()
self.assertTrue(patch_dhcp_cache.call_count == 1)
self.assertTrue(patch_dhcp_send.call_count == 1)
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