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# Copyright 2014 OpenStack Foundation
#
# 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.
from io import StringIO
import socket
import time
import mock
import six
import testtools
from tempest_lib.common import ssh
from tempest_lib import exceptions
from tempest_lib.tests import base
class TestSshClient(base.TestCase):
SELECT_POLLIN = 1
@mock.patch('paramiko.RSAKey.from_private_key')
@mock.patch('six.StringIO')
def test_pkey_calls_paramiko_RSAKey(self, cs_mock, rsa_mock):
cs_mock.return_value = mock.sentinel.csio
pkey = 'mykey'
ssh.Client('localhost', 'root', pkey=pkey)
rsa_mock.assert_called_once_with(mock.sentinel.csio)
cs_mock.assert_called_once_with('mykey')
rsa_mock.reset_mock()
cs_mock.reset_mock()
pkey = mock.sentinel.pkey
# Shouldn't call out to load a file from RSAKey, since
# a sentinel isn't a basestring...
ssh.Client('localhost', 'root', pkey=pkey)
self.assertEqual(0, rsa_mock.call_count)
self.assertEqual(0, cs_mock.call_count)
def _set_ssh_connection_mocks(self):
client_mock = mock.MagicMock()
client_mock.connect.return_value = True
return (self.patch('paramiko.SSHClient'),
self.patch('paramiko.AutoAddPolicy'),
client_mock)
def test_get_ssh_connection(self):
c_mock, aa_mock, client_mock = self._set_ssh_connection_mocks()
s_mock = self.patch('time.sleep')
c_mock.return_value = client_mock
aa_mock.return_value = mock.sentinel.aa
# Test normal case for successful connection on first try
client = ssh.Client('localhost', 'root', timeout=2)
client._get_ssh_connection(sleep=1)
aa_mock.assert_called_once_with()
client_mock.set_missing_host_key_policy.assert_called_once_with(
mock.sentinel.aa)
expected_connect = [mock.call(
'localhost',
username='root',
pkey=None,
key_filename=None,
look_for_keys=False,
timeout=10.0,
password=None
)]
self.assertEqual(expected_connect, client_mock.connect.mock_calls)
self.assertEqual(0, s_mock.call_count)
def test_get_ssh_connection_two_attemps(self):
c_mock, aa_mock, client_mock = self._set_ssh_connection_mocks()
c_mock.return_value = client_mock
client_mock.connect.side_effect = [
socket.error,
mock.MagicMock()
]
client = ssh.Client('localhost', 'root', timeout=1)
start_time = int(time.time())
client._get_ssh_connection(sleep=1)
end_time = int(time.time())
self.assertLess((end_time - start_time), 4)
self.assertGreater((end_time - start_time), 1)
def test_get_ssh_connection_timeout(self):
c_mock, aa_mock, client_mock = self._set_ssh_connection_mocks()
c_mock.return_value = client_mock
client_mock.connect.side_effect = [
socket.error,
socket.error,
socket.error,
]
client = ssh.Client('localhost', 'root', timeout=2)
start_time = int(time.time())
with testtools.ExpectedException(exceptions.SSHTimeout):
client._get_ssh_connection()
end_time = int(time.time())
self.assertLess((end_time - start_time), 5)
self.assertGreaterEqual((end_time - start_time), 2)
@mock.patch('select.POLLIN', SELECT_POLLIN, create=True)
def test_timeout_in_exec_command(self):
chan_mock, poll_mock, _ = self._set_mocks_for_select([0, 0, 0], True)
# Test for a timeout condition immediately raised
client = ssh.Client('localhost', 'root', timeout=2)
with testtools.ExpectedException(exceptions.TimeoutException):
client.exec_command("test")
chan_mock.fileno.assert_called_once_with()
chan_mock.exec_command.assert_called_once_with("test")
chan_mock.shutdown_write.assert_called_once_with()
poll_mock.register.assert_called_once_with(
chan_mock, self.SELECT_POLLIN)
poll_mock.poll.assert_called_once_with(10)
@mock.patch('select.POLLIN', SELECT_POLLIN, create=True)
def test_exec_command(self):
chan_mock, poll_mock, select_mock = (
self._set_mocks_for_select([[1, 0, 0]], True))
closed_prop = mock.PropertyMock(return_value=True)
type(chan_mock).closed = closed_prop
chan_mock.recv_exit_status.return_value = 0
chan_mock.recv.return_value = b''
chan_mock.recv_stderr.return_value = b''
client = ssh.Client('localhost', 'root', timeout=2)
client.exec_command("test")
chan_mock.fileno.assert_called_once_with()
chan_mock.exec_command.assert_called_once_with("test")
chan_mock.shutdown_write.assert_called_once_with()
select_mock.assert_called_once_with()
poll_mock.register.assert_called_once_with(
chan_mock, self.SELECT_POLLIN)
poll_mock.poll.assert_called_once_with(10)
chan_mock.recv_ready.assert_called_once_with()
chan_mock.recv.assert_called_once_with(1024)
chan_mock.recv_stderr_ready.assert_called_once_with()
chan_mock.recv_stderr.assert_called_once_with(1024)
chan_mock.recv_exit_status.assert_called_once_with()
closed_prop.assert_called_once_with()
def _set_mocks_for_select(self, poll_data, ito_value=False):
gsc_mock = self.patch('tempest_lib.common.ssh.Client.'
'_get_ssh_connection')
ito_mock = self.patch('tempest_lib.common.ssh.Client._is_timed_out')
csp_mock = self.patch(
'tempest_lib.common.ssh.Client._can_system_poll')
csp_mock.return_value = True
select_mock = self.patch('select.poll', create=True)
client_mock = mock.MagicMock()
tran_mock = mock.MagicMock()
chan_mock = mock.MagicMock()
poll_mock = mock.MagicMock()
select_mock.return_value = poll_mock
gsc_mock.return_value = client_mock
ito_mock.return_value = ito_value
client_mock.get_transport.return_value = tran_mock
tran_mock.open_session.return_value = chan_mock
if isinstance(poll_data[0], list):
poll_mock.poll.side_effect = poll_data
else:
poll_mock.poll.return_value = poll_data
return chan_mock, poll_mock, select_mock
_utf8_string = six.unichr(1071)
_utf8_bytes = _utf8_string.encode("utf-8")
@mock.patch('select.POLLIN', SELECT_POLLIN, create=True)
def test_exec_good_command_output(self):
chan_mock, poll_mock, _ = self._set_mocks_for_select([1, 0, 0])
closed_prop = mock.PropertyMock(return_value=True)
type(chan_mock).closed = closed_prop
chan_mock.recv_exit_status.return_value = 0
chan_mock.recv.side_effect = [self._utf8_bytes[0:1],
self._utf8_bytes[1:], b'R', b'']
chan_mock.recv_stderr.return_value = b''
client = ssh.Client('localhost', 'root', timeout=2)
out_data = client.exec_command("test")
self.assertEqual(self._utf8_string + 'R', out_data)
@mock.patch('select.POLLIN', SELECT_POLLIN, create=True)
def test_exec_bad_command_output(self):
chan_mock, poll_mock, _ = self._set_mocks_for_select([1, 0, 0])
closed_prop = mock.PropertyMock(return_value=True)
type(chan_mock).closed = closed_prop
chan_mock.recv_exit_status.return_value = 1
chan_mock.recv.return_value = b''
chan_mock.recv_stderr.side_effect = [b'R', self._utf8_bytes[0:1],
self._utf8_bytes[1:], b'']
client = ssh.Client('localhost', 'root', timeout=2)
exc = self.assertRaises(exceptions.SSHExecCommandFailed,
client.exec_command, "test")
self.assertIn('R' + self._utf8_string, six.text_type(exc))
def test_exec_command_no_select(self):
gsc_mock = self.patch('tempest_lib.common.ssh.Client.'
'_get_ssh_connection')
csp_mock = self.patch(
'tempest_lib.common.ssh.Client._can_system_poll')
csp_mock.return_value = False
select_mock = self.patch('select.poll', create=True)
client_mock = mock.MagicMock()
tran_mock = mock.MagicMock()
chan_mock = mock.MagicMock()
# Test for proper reading of STDOUT and STDERROR
gsc_mock.return_value = client_mock
client_mock.get_transport.return_value = tran_mock
tran_mock.open_session.return_value = chan_mock
chan_mock.recv_exit_status.return_value = 0
std_out_mock = mock.MagicMock(StringIO)
std_err_mock = mock.MagicMock(StringIO)
chan_mock.makefile.return_value = std_out_mock
chan_mock.makefile_stderr.return_value = std_err_mock
client = ssh.Client('localhost', 'root', timeout=2)
client.exec_command("test")
chan_mock.makefile.assert_called_once_with('rb', 1024)
chan_mock.makefile_stderr.assert_called_once_with('rb', 1024)
std_out_mock.read.assert_called_once_with()
std_err_mock.read.assert_called_once_with()
self.assertFalse(select_mock.called)
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