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#!/usr/bin/python
# Copyright 2016 Google Inc. All Rights Reserved.
#
# 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.
"""Unittest for ip_forwarding_utils.py module."""
from google_compute_engine.ip_forwarding import ip_forwarding_utils
from google_compute_engine.test_compat import builtin
from google_compute_engine.test_compat import mock
from google_compute_engine.test_compat import unittest
def _CreateMockProcess(returncode, stdout, stderr):
mock_process = mock.Mock()
mock_process.returncode = returncode
mock_process.communicate.return_value = (stdout, stderr)
return mock_process
class IpForwardingUtilsTest(unittest.TestCase):
def setUp(self):
self.mock_logger = mock.Mock()
self.options = {'hello': 'world'}
with mock.patch(
'google_compute_engine.ip_forwarding.ip_forwarding_utils'
'.subprocess') as mock_subprocess:
mock_subprocess.Popen.return_value = _CreateMockProcess(
0, b'out', b'')
self.mock_utils = ip_forwarding_utils.IpForwardingUtils(
self.mock_logger)
self.mock_utils.proto_id = 'proto'
def testCreateRouteOptions(self):
# Default options.
expected_options = {
'proto': 'proto',
'scope': 'host',
}
self.assertEqual(self.mock_utils._CreateRouteOptions(), expected_options)
# Update dictionary when arguments are specified.
expected_options = {
'proto': 'proto',
'scope': 'host',
'num': 1,
'string': 'hello world',
}
self.assertEqual(
self.mock_utils._CreateRouteOptions(num=1, string='hello world'),
expected_options)
# Update the default options.
expected_options = {
'proto': 'test 1',
'scope': 'test 2',
}
self.assertEqual(
self.mock_utils._CreateRouteOptions(proto='test 1', scope='test 2'),
expected_options)
@mock.patch('google_compute_engine.ip_forwarding.ip_forwarding_utils.subprocess')
def testRunIpRoute(self, mock_subprocess):
mock_process = _CreateMockProcess(0, b'out', b'')
mock_subprocess.Popen.return_value = mock_process
args = ['foo', 'bar']
options = {'one': 'two'}
self.assertEqual(
self.mock_utils._RunIpRoute(args=args, options=options), 'out')
command = ['ip', 'route', 'foo', 'bar', 'one', 'two']
mock_subprocess.Popen.assert_called_once_with(
command, stdout=mock_subprocess.PIPE, stderr=mock_subprocess.PIPE)
mock_process.communicate.assert_called_once_with()
self.mock_logger.warning.assert_not_called()
@mock.patch('google_compute_engine.ip_forwarding.ip_forwarding_utils.subprocess')
def testRunIpRouteReturnCode(self, mock_subprocess):
mock_process = _CreateMockProcess(1, b'out', b'error\n')
mock_subprocess.Popen.return_value = mock_process
self.assertEqual(
self.mock_utils._RunIpRoute(args=['foo', 'bar'], options=self.options),
'')
command = ['ip', 'route', 'foo', 'bar', 'hello', 'world']
self.mock_logger.warning.assert_called_once_with(mock.ANY, command, b'error')
@mock.patch('google_compute_engine.ip_forwarding.ip_forwarding_utils.subprocess')
def testRunIpRouteException(self, mock_subprocess):
mock_subprocess.Popen.side_effect = OSError('Test Error')
self.assertEqual(
self.mock_utils._RunIpRoute(args=['foo', 'bar'], options=self.options),
'')
command = ['ip', 'route', 'foo', 'bar', 'hello', 'world']
self.mock_logger.warning.assert_called_once_with(
mock.ANY, command, 'Test Error')
def testParseForwardedIps(self):
self.assertEqual(self.mock_utils.ParseForwardedIps(None), [])
self.assertEqual(self.mock_utils.ParseForwardedIps([]), [])
self.assertEqual(self.mock_utils.ParseForwardedIps([None]), [])
self.assertEqual(self.mock_utils.ParseForwardedIps(['invalid']), [])
self.assertEqual(self.mock_utils.ParseForwardedIps(['1a1a1a1']), [])
self.assertEqual(self.mock_utils.ParseForwardedIps(['1.1.1.1.1']), [])
self.assertEqual(self.mock_utils.ParseForwardedIps(['1111.1.1.1']), [])
self.assertEqual(self.mock_utils.ParseForwardedIps(['1.1.1.1111']), [])
expected_calls = [
mock.call.warning(mock.ANY, None),
mock.call.warning(mock.ANY, 'invalid'),
mock.call.warning(mock.ANY, '1a1a1a1'),
mock.call.warning(mock.ANY, '1.1.1.1.1'),
mock.call.warning(mock.ANY, '1111.1.1.1'),
mock.call.warning(mock.ANY, '1.1.1.1111'),
]
self.assertEqual(self.mock_logger.mock_calls, expected_calls)
def testParseForwardedIpsComplex(self):
forwarded_ips = {
'{{}}\n\"hello\"\n!@#$%^&*()\n\n': False,
'1111.1.1.1': False,
'1.1.1.1': True,
'hello': False,
'123.123.123.123': True,
'1.1.1.': False,
'1.1.1.a': False,
None: False,
'1.0.0.0': True,
}
input_ips = forwarded_ips.keys()
valid_ips = [ip for ip, valid in forwarded_ips.items() if valid]
invalid_ips = [ip for ip, valid in forwarded_ips.items() if not valid]
self.assertEqual(self.mock_utils.ParseForwardedIps(input_ips), valid_ips)
expected_calls = [mock.call.warning(mock.ANY, ip) for ip in invalid_ips]
self.assertEqual(self.mock_logger.mock_calls, expected_calls)
def testGetForwardedIps(self):
mock_options = mock.Mock()
mock_options.return_value = self.options
mock_run = mock.Mock()
mock_run.return_value = 'a\nb\n'
mock_parse = mock.Mock()
mock_parse.return_value = ['Test']
self.mock_utils._CreateRouteOptions = mock_options
self.mock_utils._RunIpRoute = mock_run
self.mock_utils.ParseForwardedIps = mock_parse
self.assertEqual(self.mock_utils.GetForwardedIps('interface'), ['Test'])
mock_options.assert_called_once_with(dev='interface')
mock_run.assert_called_once_with(
args=['ls', 'table', 'local', 'type', 'local'], options=self.options)
mock_parse.assert_called_once_with(['a', 'b'])
def testAddForwardedIp(self):
mock_options = mock.Mock()
mock_options.return_value = self.options
mock_run = mock.Mock()
self.mock_utils._CreateRouteOptions = mock_options
self.mock_utils._RunIpRoute = mock_run
self.mock_utils.AddForwardedIp('1.1.1.1', 'interface')
mock_options.assert_called_once_with(dev='interface')
mock_run.assert_called_once_with(
args=['add', 'to', 'local', '1.1.1.1/32'], options=self.options)
def testRemoveForwardedIp(self):
mock_options = mock.Mock()
mock_options.return_value = self.options
mock_run = mock.Mock()
self.mock_utils._CreateRouteOptions = mock_options
self.mock_utils._RunIpRoute = mock_run
self.mock_utils.RemoveForwardedIp('1.1.1.1', 'interface')
mock_options.assert_called_once_with(dev='interface')
mock_run.assert_called_once_with(
args=['delete', 'to', 'local', '1.1.1.1/32'], options=self.options)
if __name__ == '__main__':
unittest.main()
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