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# -*- coding: utf-8 -*-
# Copyright (C) 2010, 2011 Sebastian Wiesner <lunaryorn@googlemail.com>
# This library is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation; either version 2.1 of the License, or (at your
# option) any later version.
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
# for more details.
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
from __future__ import (print_function, division, unicode_literals,
absolute_import)
import sys
import socket
import errno
from select import select
import pytest
import mock
from pyudev import Monitor, Device
# many tests just consist of some monkey patching to test, that the Monitor
# class actually calls out to udev, correctly passing arguments and handling
# return value. Actual udev calls are difficult to test, as return values
# and side effects are dynamic and environment-dependent. It isn't
# necessary anyway, libudev can just assumed to be correct.
def _assert_from_netlink_called(context, *args):
new_from_netlink = 'udev_monitor_new_from_netlink'
with pytest.patch_libudev(new_from_netlink) as new_from_netlink:
source = args[0].encode('ascii') if args else b'udev'
new_from_netlink.return_value = mock.sentinel.pointer
monitor = Monitor.from_netlink(context, *args)
new_from_netlink.assert_called_with(context, source)
assert isinstance(new_from_netlink.call_args[0][1], bytes)
assert monitor._as_parameter_ is mock.sentinel.pointer
class TestMonitor(object):
def test_from_netlink_invalid_source(self, context):
with pytest.raises(ValueError) as exc_info:
Monitor.from_netlink(context, source='invalid_source')
message = ('Invalid source: {0!r}. Must be one of "udev" '
'or "kernel"'.format('invalid_source'))
assert str(exc_info.value) == message
def test_from_netlink_source_udev(self, context):
monitor = Monitor.from_netlink(context)
assert monitor._as_parameter_
monitor = Monitor.from_netlink(context, source='udev')
assert monitor._as_parameter_
def test_from_netlink_source_udev_mock(self, context):
_assert_from_netlink_called(context)
_assert_from_netlink_called(context, 'udev')
def test_from_netlink_source_kernel(self, context):
monitor = Monitor.from_netlink(context, source='kernel')
assert monitor._as_parameter_
def test_from_netlink_source_kernel_mock(self, context):
_assert_from_netlink_called(context, 'kernel')
def test_from_socket(self, context, socket_path):
monitor = Monitor.from_socket(context, str(socket_path))
assert monitor._as_parameter_
def test_from_socket_mock(self, context, socket_path):
socket_path = str(socket_path)
new_from_socket = 'udev_monitor_new_from_socket'
with pytest.patch_libudev(new_from_socket) as new_from_socket:
new_from_socket.return_value = mock.sentinel.pointer
monitor = Monitor.from_socket(context, socket_path)
new_from_socket.assert_called_with(
context, socket_path.encode(sys.getfilesystemencoding()))
assert monitor._as_parameter_ is mock.sentinel.pointer
Monitor.from_socket(context, 'foobar')
new_from_socket.assert_called_with(context, b'foobar')
assert isinstance(new_from_socket.call_args[0][1], bytes)
def test_fileno(self, monitor):
# we can't do more than check that no exception is thrown
monitor.fileno()
def test_fileno_mock(self, monitor):
get_fd = 'udev_monitor_get_fd'
with pytest.patch_libudev(get_fd) as get_fd:
get_fd.return_value = mock.sentinel.fileno
assert monitor.fileno() is mock.sentinel.fileno
get_fd.assert_called_with(monitor)
def test_filter_by_no_subsystem(self, monitor):
with pytest.raises(AttributeError):
monitor.filter_by(None)
def test_filter_by_subsystem_no_dev_type(self, monitor):
monitor.filter_by(b'input')
monitor.filter_by('input')
def test_filter_by_subsystem_no_dev_type_mock(self, monitor):
add_match = 'udev_monitor_filter_add_match_subsystem_devtype'
with pytest.patch_libudev(add_match) as add_match:
add_match.return_value = 0
monitor.filter_by(b'input')
add_match.assert_called_with(monitor, b'input', None)
monitor.filter_by('input')
add_match.assert_called_with(monitor, b'input', None)
assert isinstance(add_match.call_args[0][1], bytes)
def test_filter_by_subsystem_dev_type(self, monitor):
monitor.filter_by('input', b'usb_interface')
monitor.filter_by('input', 'usb_interface')
def test_filter_by_subsystem_dev_type_mock(self, monitor):
add_match = 'udev_monitor_filter_add_match_subsystem_devtype'
with pytest.patch_libudev(add_match) as add_match:
add_match.return_value = 0
monitor.filter_by(b'input', b'usb_interface')
add_match.assert_called_with(monitor, b'input', b'usb_interface')
monitor.filter_by('input', 'usb_interface')
add_match.assert_called_with(monitor, b'input', b'usb_interface')
assert isinstance(add_match.call_args[0][2], bytes)
@pytest.need_udev_version('>= 154')
def test_filter_by_tag(self, monitor):
monitor.filter_by_tag('spam')
@pytest.need_udev_version('>= 154')
def test_pytest_filter_by_tag_mock(self, monitor):
match_tag = 'udev_monitor_filter_add_match_tag'
with pytest.patch_libudev(match_tag) as match_tag:
match_tag.return_value = 0
monitor.filter_by_tag(b'spam')
match_tag.assert_called_with(monitor, b'spam')
monitor.filter_by_tag('eggs')
match_tag.assert_called_with(monitor, b'eggs')
assert isinstance(match_tag.call_args[0][1], bytes)
def test_enable_receiving_netlink_kernel_source(self, context):
monitor = Monitor.from_netlink(context, source='kernel')
monitor.enable_receiving()
def test_enable_receiving_socket(self, context, socket_path):
monitor = Monitor.from_socket(context, str(socket_path))
monitor.enable_receiving()
def test_enable_receiving_bound_socket(self, context, socket_path):
sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
# cause an error by binding the socket, thus testing error handling in
# this method
sock.bind(str(socket_path))
monitor = Monitor.from_socket(context, str(socket_path))
with pytest.raises(EnvironmentError) as exc_info:
monitor.enable_receiving()
pytest.assert_env_error(exc_info.value, errno.EADDRINUSE, str(socket_path))
def test_enable_receiving_alias(self):
assert Monitor.start == Monitor.enable_receiving
def test_enable_receiving_mock(self, monitor):
with pytest.patch_libudev('udev_monitor_enable_receiving') as func:
func.return_value = 0
monitor.enable_receiving()
func.assert_called_with(monitor)
def test_set_receive_buffer_size_mock(self, monitor):
set_receive_buffer_size = 'udev_monitor_set_receive_buffer_size'
with pytest.patch_libudev(set_receive_buffer_size) as func:
func.return_value = 0
monitor.set_receive_buffer_size(1000)
func.assert_called_with(monitor, 1000)
def test_set_receive_buffer_size_privilege_error(self, monitor,
socket_path):
with pytest.raises(EnvironmentError) as exc_info:
monitor.set_receive_buffer_size(1000)
pytest.assert_env_error(exc_info.value, errno.EPERM)
@pytest.mark.privileged
def test_receive_device(self, monitor):
# forcibly unload the dummy module to avoid hangs
pytest.unload_dummy()
monitor.filter_by('net')
monitor.enable_receiving()
# load the dummy device to trigger an add event
pytest.load_dummy()
select([monitor], [], [])
action, device = monitor.receive_device()
assert action == 'add'
assert device.subsystem == 'net'
assert device.device_path == '/devices/virtual/net/dummy0'
# and unload again
pytest.unload_dummy()
action, device = monitor.receive_device()
assert action == 'remove'
assert device.subsystem == 'net'
assert device.device_path == '/devices/virtual/net/dummy0'
def test_receive_device_mock(self, monitor):
receive_device = 'udev_monitor_receive_device'
get_action = 'udev_device_get_action'
with pytest.nested(pytest.patch_libudev(receive_device),
pytest.patch_libudev(get_action)) as (receive_device,
get_action):
receive_device.return_value = mock.sentinel.pointer
get_action.return_value = b'action'
action, device = monitor.receive_device()
assert action == 'action'
assert pytest.is_unicode_string(action)
assert isinstance(device, Device)
assert device.context is monitor.context
assert device._as_parameter_ is mock.sentinel.pointer
get_action.assert_called_with(mock.sentinel.pointer)
receive_device.assert_called_with(monitor)
@pytest.mark.privileged
def test_iter(self, monitor):
pytest.unload_dummy()
monitor.filter_by('net')
monitor.enable_receiving()
pytest.load_dummy()
iterator = iter(monitor)
action, device = next(iterator)
assert action == 'add'
assert device.subsystem == 'net'
assert device.device_path == '/devices/virtual/net/dummy0'
pytest.unload_dummy()
action, device = next(iterator)
assert action == 'remove'
assert device.subsystem == 'net'
assert device.device_path == '/devices/virtual/net/dummy0'
iterator.close()
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