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# -*- coding: utf-8 -*-
# Copyright (C) 2011, 2012 Sebastian Wiesner <lunaryorn@gmail.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 re
import ctypes
import pytest
from pyudev import _libudev as binding
libudev = binding.libudev
WRAPPER_BLACKLIST_PATTERNS = [
# vararg functions not supported by ctypes
'udev_set_log_fn',
# superfluous in Python, because arbitrary attributes can be attached to
# objects anyways
'udev_set_userdata', 'udev_get_userdata',
# superfluous, because context is already available in .context
'udev_enumerate_get_udev', 'udev_monitor_get_udev', 'udev_device_get_udev',
# superfluous, because Python provides already tools to filter lists
'udev_list_entry_get_by_name',
# superfluous because of ".encode('string-escape')"
'udev_util_encode_string',
# deprecated and removed in recent udev versions
'udev_monitor_new_from_socket',
# all queue functions (queue interface is not wrapped)
re.compile('^udev_queue_.*'),
# XXX: I've no clue what these functions actually do
'udev_enumerate_add_syspath',
'udev_enumerate_scan_subsystems',
]
def _is_blacklisted(function):
for pattern in WRAPPER_BLACKLIST_PATTERNS:
if pytest.is_unicode_string(pattern):
if function.name == pattern:
return True
else:
if pattern.match(function.name):
return True
else:
return False
FUNDAMENTAL_TYPES = {
'int': ctypes.c_int,
'char': ctypes.c_char,
'long long unsigned int': ctypes.c_ulonglong,
'long unsigned int': ctypes.c_ulong,
'void': None,
}
def _pointer_to_ctypes(pointer):
underlying_type = _to_ctypes(pointer.type)
if underlying_type is ctypes.c_char:
return ctypes.c_char_p
else:
return ctypes.POINTER(underlying_type)
TYPE_CONVERTER = {
'FundamentalType': lambda t: FUNDAMENTAL_TYPES[t.name],
'Struct': lambda s: getattr(binding, s.name),
'PointerType': _pointer_to_ctypes,
# const qualifiers are ignored in ctypes
'CvQualifiedType': lambda t: _to_ctypes(t.type),
# propagate type defs
'Typedef': lambda t: _to_ctypes(t.type),
}
def _to_ctypes(libudev_type):
return TYPE_CONVERTER[libudev_type.__class__.__name__](libudev_type)
class LibudevFunction(object):
def __init__(self, declaration):
self.declaration = declaration
@property
def name(self):
return self.declaration.name
@property
def wrapper(self):
return getattr(libudev, self.name)
@property
def argument_types(self):
return [_to_ctypes(a) for a in self.declaration.arguments]
@property
def return_type(self):
return _to_ctypes(self.declaration.return_type)
def pytest_funcarg__libudev_function(request):
"""
Override ``libudev_function`` to skip tests for blacklisted functions.
"""
function = request.getfuncargvalue('libudev_function')
if _is_blacklisted(function):
pytest.skip('{0} is not wrapped'.format(function.name))
return LibudevFunction(function)
def test_arguments(libudev_function):
assert libudev_function.wrapper.argtypes == libudev_function.argument_types
def test_return_type(libudev_function):
# Ignore the return type of *_unref() functions. The return value of these
# functions is unused in pyudev, so it doesn't need to be wrapped.
restype = (libudev_function.return_type
if not libudev_function.name.endswith('_unref')
else None)
assert libudev_function.wrapper.restype == restype
def test_error_checker(libudev_function):
name = libudev_function.name
if name in binding.ERROR_CHECKERS:
assert libudev_function.wrapper.errcheck == \
binding.ERROR_CHECKERS[name]
else:
pytest.skip('{0} has no error checker'.format(name))
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