117 lines
4.2 KiB
Python
117 lines
4.2 KiB
Python
# Copyright 2020 Red Hat, Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import random
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from unittest import mock
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from octavia.amphorae.backends.utils import network_namespace
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from octavia.tests.common import utils as test_utils
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import octavia.tests.unit.base as base
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class TestNetworkNamespace(base.TestCase):
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def setUp(self):
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super().setUp()
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@mock.patch('ctypes.get_errno')
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@mock.patch('ctypes.CDLL')
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def test_error_handler(self, mock_cdll, mock_get_errno):
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FAKE_NETNS = 'fake-netns'
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netns = network_namespace.NetworkNamespace(FAKE_NETNS)
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# Test result 0
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netns._error_handler(0, None, None)
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mock_get_errno.assert_not_called()
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# Test result -1
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mock_get_errno.reset_mock()
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self.assertRaises(OSError, netns._error_handler, -1, None, None)
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mock_get_errno.assert_called_once_with()
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@mock.patch('os.getpid')
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@mock.patch('ctypes.CDLL')
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def test_init(self, mock_cdll, mock_getpid):
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FAKE_NETNS = 'fake-netns'
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FAKE_PID = random.randrange(100000)
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mock_cdll_obj = mock.MagicMock()
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mock_cdll.return_value = mock_cdll_obj
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mock_getpid.return_value = FAKE_PID
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expected_current_netns = '/proc/{pid}/ns/net'.format(pid=FAKE_PID)
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expected_target_netns = '/var/run/netns/{netns}'.format(
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netns=FAKE_NETNS)
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netns = network_namespace.NetworkNamespace(FAKE_NETNS)
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self.assertEqual(expected_current_netns, netns.current_netns)
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self.assertEqual(expected_target_netns, netns.target_netns)
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self.assertEqual(mock_cdll_obj.setns, netns.set_netns)
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self.assertEqual(netns.set_netns.errcheck, netns._error_handler)
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@mock.patch('os.getpid')
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@mock.patch('ctypes.CDLL')
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def test_enter(self, mock_cdll, mock_getpid):
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CLONE_NEWNET = 0x40000000
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FAKE_NETNS = 'fake-netns'
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FAKE_PID = random.randrange(100000)
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current_netns_fd = random.randrange(100000)
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target_netns_fd = random.randrange(100000)
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mock_getpid.return_value = FAKE_PID
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mock_cdll_obj = mock.MagicMock()
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mock_cdll.return_value = mock_cdll_obj
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expected_current_netns = '/proc/{pid}/ns/net'.format(pid=FAKE_PID)
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expected_target_netns = '/var/run/netns/{netns}'.format(
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netns=FAKE_NETNS)
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netns = network_namespace.NetworkNamespace(FAKE_NETNS)
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current_mock_open = self.useFixture(
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test_utils.OpenFixture(expected_current_netns)).mock_open
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current_mock_open.return_value = current_netns_fd
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target_mock_open = self.useFixture(
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test_utils.OpenFixture(expected_target_netns)).mock_open
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handle = target_mock_open()
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handle.fileno.return_value = target_netns_fd
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netns.__enter__()
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self.assertEqual(current_netns_fd, netns.current_netns_fd)
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netns.set_netns.assert_called_once_with(target_netns_fd, CLONE_NEWNET)
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@mock.patch('os.getpid')
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@mock.patch('ctypes.CDLL')
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def test_exit(self, mock_cdll, mock_getpid):
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CLONE_NEWNET = 0x40000000
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FAKE_NETNS = 'fake-netns'
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FAKE_PID = random.randrange(100000)
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current_netns_fileno = random.randrange(100000)
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mock_getpid.return_value = FAKE_PID
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mock_cdll_obj = mock.MagicMock()
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mock_cdll.return_value = mock_cdll_obj
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mock_current_netns_fd = mock.MagicMock()
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mock_current_netns_fd.fileno.return_value = current_netns_fileno
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netns = network_namespace.NetworkNamespace(FAKE_NETNS)
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netns.current_netns_fd = mock_current_netns_fd
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netns.__exit__()
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netns.set_netns.assert_called_once_with(current_netns_fileno,
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CLONE_NEWNET)
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mock_current_netns_fd.close.assert_called_once_with()
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