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# -*- coding: utf-8 -*-
# Copyright (C) 2015 Anne Mulhern <amulhern@redhat.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
"""
tests.test_discover
===================
Tests discovering what device is meant by somewhat unspecific information.
.. moduleauthor:: mulhern <amulhern@redhat.com>
"""
# isort: STDLIB
import os
# isort: THIRDPARTY
import pytest
from hypothesis import assume, given, settings, strategies
# isort: LOCAL
import pyudev
from pyudev import (
DeviceFileHypothesis,
DeviceNameHypothesis,
DeviceNumberHypothesis,
DevicePathHypothesis,
Discovery,
)
_CONTEXT = pyudev.Context()
_DEVICES = [d for d in _CONTEXT.list_devices()]
NUM_TESTS = 5
class TestUtilities:
"""
Some utilities used by the actual tests.
"""
@staticmethod
def get_device_numbers(a_device, a_string):
"""
Get the device number from the device in a few formats.
:param :class:`Device` a_device: the device
:param str a_string: a likely string between the major and minor
:returns: a tuple of device numbers
:rtype: tuple of str
"""
device_number = a_device.device_number
major_number = os.major(device_number)
minor_number = os.minor(device_number)
pair_number = "%s%s%s" % (major_number, a_string, minor_number)
return (str(device_number), pair_number)
@staticmethod
def get_paths(a_device):
"""
Get some variants on a device path.
:param :class:`Device` a_device: the device
:returns: a tuple of paths in sysfs
:rtype: tuple of str
"""
sys_path = a_device.sys_path
(_, _, truncated_path) = sys_path[1:].partition("/")
return (sys_path, truncated_path, a_device.device_path)
@staticmethod
def get_files(a_device):
"""
Get a bunch of files, including device nodes and links.
:param :class:`Device` a_device: the device
:returns: a list of files
:rtype: list of str
"""
links = list(a_device.device_links)
names = [os.path.basename(l) for l in links]
links.extend(names)
device_node = a_device.device_node
if device_node:
links.append(device_node)
return links
class TestDiscovery:
"""
Test discovery of an object from limited bits of its description.
"""
_CONTEXT = pyudev.Context()
_DISCOVER = Discovery()
_DISCOVER.setup(_CONTEXT)
@given(
strategies.sampled_from(_DEVICES).filter(lambda x: x.device_number),
strategies.text(":, -/+=").filter(lambda x: x),
)
@settings(max_examples=NUM_TESTS)
def test_device_number(self, a_device, a_string):
"""
Test lookup by a device number.
Note that device number is per class, so there may be two
devices with the same device number.
"""
for number in TestUtilities.get_device_numbers(a_device, a_string):
res = DeviceNumberHypothesis.get_devices(self._CONTEXT, number)
assert a_device in res
@given(strategies.sampled_from(_DEVICES))
@settings(max_examples=NUM_TESTS)
def test_path(self, a_device):
"""
Test lookup by path.
"""
for path in TestUtilities.get_paths(a_device):
res = DevicePathHypothesis.get_devices(self._CONTEXT, path)
assert res == set((a_device,))
@given(strategies.sampled_from(_DEVICES))
@settings(max_examples=NUM_TESTS)
def test_name(self, a_device):
"""
Test lookup by device name.
Note that there may be multiple devices corresponding to the name
in different subsystems.
"""
name = a_device.sys_name
res = DeviceNameHypothesis.get_devices(self._CONTEXT, name)
assert a_device in res
_devices = [d for d in _DEVICES if list(d.device_links)]
@given(
strategies.sampled_from(_DEVICES),
strategies.text(":, -/+=").filter(lambda x: x),
)
@settings(max_examples=NUM_TESTS)
def test_anything(self, a_device, a_string):
"""
Grab any of the likely candidates for looking up a device.
"""
assume(not "DM_MULTIPATH_TIMESTAMP" in a_device.properties)
values = list(TestUtilities.get_device_numbers(a_device, a_string))
values.extend(TestUtilities.get_paths(a_device))
values.append(a_device.sys_name)
values.extend(TestUtilities.get_files(a_device))
results = frozenset(
d for v in values for d in self._DISCOVER.get_devices(self._CONTEXT, v)
)
assert a_device in results
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