mirror of
https://github.com/clearlinux/WALinuxAgent.git
synced 2026-09-03 04:11:51 +00:00
Hans Krijger
028a77f3b4
* fix bug in cache lookup logic; allow skipping the cache in failure mode * code review feedback
108 lines
4.3 KiB
Python
108 lines
4.3 KiB
Python
# Copyright 2014 Microsoft Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Requires Python 2.4+ and Openssl 1.0+
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#
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import mock
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import azurelinuxagent.common.dhcp as dhcp
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import azurelinuxagent.common.osutil.default as osutil
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from tests.tools import *
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class TestDHCP(AgentTestCase):
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def test_wireserver_route_exists(self):
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# setup
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dhcp_handler = dhcp.get_dhcp_handler()
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self.assertTrue(dhcp_handler.endpoint is None)
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self.assertTrue(dhcp_handler.routes is None)
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self.assertTrue(dhcp_handler.gateway is None)
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# execute
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routing_table = "\
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Iface Destination Gateway Flags RefCnt Use Metric " \
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"Mask MTU Window IRTT \n\
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eth0 00000000 10813FA8 0003 0 0 5 " \
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"00000000 0 0 0 \n\
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eth0 00345B0A 00000000 0001 0 0 5 " \
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"00000000 0 0 0 \n\
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lo 00000000 01345B0A 0003 0 0 1 " \
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"00FCFFFF 0 0 0 \n"
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with patch("os.path.exists", return_value=True):
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mo = mock.mock_open(read_data=routing_table)
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with patch(open_patch(), mo):
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self.assertTrue(dhcp_handler.wireserver_route_exists)
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# test
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self.assertTrue(dhcp_handler.endpoint is not None)
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self.assertTrue(dhcp_handler.routes is None)
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self.assertTrue(dhcp_handler.gateway is None)
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def test_wireserver_route_not_exists(self):
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# setup
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dhcp_handler = dhcp.get_dhcp_handler()
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self.assertTrue(dhcp_handler.endpoint is None)
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self.assertTrue(dhcp_handler.routes is None)
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self.assertTrue(dhcp_handler.gateway is None)
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# execute
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self.assertFalse(dhcp_handler.wireserver_route_exists)
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# test
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self.assertTrue(dhcp_handler.endpoint is None)
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self.assertTrue(dhcp_handler.routes is None)
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self.assertTrue(dhcp_handler.gateway is None)
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def test_dhcp_cache_exists(self):
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dhcp_handler = dhcp.get_dhcp_handler()
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dhcp_handler.osutil = osutil.DefaultOSUtil()
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with patch.object(osutil.DefaultOSUtil, 'get_dhcp_lease_endpoint',
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return_value=None):
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self.assertFalse(dhcp_handler.dhcp_cache_exists)
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self.assertEqual(dhcp_handler.endpoint, None)
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with patch.object(osutil.DefaultOSUtil, 'get_dhcp_lease_endpoint',
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return_value="foo"):
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self.assertTrue(dhcp_handler.dhcp_cache_exists)
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self.assertEqual(dhcp_handler.endpoint, "foo")
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def test_dhcp_skip_cache(self):
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handler = dhcp.get_dhcp_handler()
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handler.osutil = osutil.DefaultOSUtil()
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with patch('os.path.exists', return_value=False):
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with patch.object(osutil.DefaultOSUtil, 'get_dhcp_lease_endpoint')\
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as patch_dhcp_cache:
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with patch.object(dhcp.DhcpHandler, 'send_dhcp_req') \
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as patch_dhcp_send:
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endpoint = 'foo'
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patch_dhcp_cache.return_value = endpoint
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# endpoint comes from cache
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self.assertFalse(handler.skip_cache)
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handler.run()
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self.assertTrue(patch_dhcp_cache.call_count == 1)
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self.assertTrue(patch_dhcp_send.call_count == 0)
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self.assertTrue(handler.endpoint == endpoint)
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# reset
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handler.skip_cache = True
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handler.endpoint = None
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# endpoint comes from dhcp request
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self.assertTrue(handler.skip_cache)
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handler.run()
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self.assertTrue(patch_dhcp_cache.call_count == 1)
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self.assertTrue(patch_dhcp_send.call_count == 1)
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