Mal*_*nes 14 python unit-testing pytest python-3.x python-3.5
注意:有关我的设置(python版本,模块等)的所有详细信息都列在问题的底部.
如果这个问题是公然的,请提前道歉,但我已经和它摔跤了好几天了.希望有人可以提供一些新的亮点.
我正在从unittest- > 转换我的个人项目的单元测试pytest.以前我使用的是内置unittest.mock模块,但现在我正在尝试使用pytest-mock插件.
我有一种偷偷摸摸的感觉,我的测试是将模拟对象泄漏到彼此中.
原因如下:
高级细节:
# Python version
Python 3.5.2
# Pytest version ( and plugins )
pytest==3.0.7
pytest-benchmark==3.1.0a2
pytest-catchlog==1.2.2
pytest-cov==2.4.0
pytest-ipdb==0.1.dev2
pytest-leaks==0.2.2
pytest-mock==1.6.0
pytest-rerunfailures==2.1.0
pytest-sugar==0.8.0
pytest-timeout==1.2.0
python-dateutil==2.6.0
python-dbusmock==0.16.7
当我使用以下命令运行我的测试时:
py.test --pdb --showlocals -v -R : -k test_subprocess.py
一切都很好,直到我们到达test_subprocess_check_command_type.此时我收到以下错误:
# Set mock return types
# mock_map_type_to_command.return_value = int
# action
with pytest.raises(TypeError) as excinfo:
scarlett_os.subprocess.Subprocess(test_command,
name=test_name,
fork=test_fork,
> run_check_command=True)
E Failed: DID NOT RAISE <class 'TypeError'>
excinfo = <[AttributeError("'ExceptionInfo' object has no attribute 'typename'") raised in repr()] ExceptionInfo object at 0x7f8c380f9dc0>
mock_fork = <Mock name='mock_fork' id='140240122195184'>
mock_logging_debug = <Mock name='mock_logging_debug' id='140240128747640'>
mock_map_type_to_command = <Mock name='mock_map_type_to_command' id='140240122785112'>
mocker = <pytest_mock.MockFixture object at 0x7f8c329f07a8>
monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7f8c329f0810>
self = <tests.test_subprocess.TestScarlettSubprocess object at 0x7f8c32aaac20>
test_command = ['who', '-b']
test_fork = False
test_name = 'test_who'
tests/test_subprocess.py:267: Failed
tests/test_subprocess.py::TestScarlettSubprocess.test_subprocess_check_command_type ? 100% ??????????
但!
如果我过滤掉除问题之外的所有其他测试,那么我得到:
通过 py.test --pdb --showlocals -v -R : -k test_subprocess_check_command_type
pi@0728af726f1f:~/dev/bossjones-github/scarlett_os$ py.test --pdb --showlocals -v -R : -k test_subprocess_check_command_type
/usr/local/lib/python3.5/site-packages/_pdbpp_path_hack/pdb.py:4: ResourceWarning: unclosed file <_io.TextIOWrapper name='/usr/local/lib/python3.5/site-packages/pdb.py' mode='r' encoding='UTF-8'>
os.path.dirname(os.path.dirname(__file__)), 'pdb.py')).read(), os.path.join(
Test session starts (platform: linux, Python 3.5.2, pytest 3.0.7, pytest-sugar 0.8.0)
cachedir: .cache
benchmark: 3.1.0a2 (defaults: timer=time.perf_counter disable_gc=False min_rounds=5 min_time=0.000005 max_time=1.0 calibration_precision=10 warmup=False warmup_iterations=100000)
rootdir: /home/pi/dev/bossjones-github/scarlett_os, inifile: setup.cfg
plugins: timeout-1.2.0, sugar-0.8.0, rerunfailures-2.1.0, mock-1.6.0, leaks-0.2.2, ipdb-0.1.dev2, cov-2.4.0, catchlog-1.2.2, benchmark-3.1.0a2
timeout: 60.0s method: signal
NOTE: DBUS_SESSION_BUS_ADDRESS environment var not found!
[DBUS_SESSION_BUS_ADDRESS]: unix:path=/tmp/dbus_proxy_outside_socket
tests/test_subprocess.py::TestScarlettSubprocess.test_subprocess_check_command_type ? 100% ??????????
Results (8.39s):
1 passed
190 deselected
pi@0728af726f1f:~/dev/bossjones-github/scarlett_os$
我还尝试手动评论以下2个测试,他们允许我再次成功运行所有测试:
test_subprocess_inittest_subprocess_map_type_to_command任何人都能看到我的设置出现问题吗？我已经阅读了几篇关于"在哪里模拟"的博客文章,并多次查看文档本身,不知道我错过了什么.https://docs.python.org/3/library/unittest.mock.html
我的设置细节
以下是解决此问题可能需要的所有内容.如果我需要提供更多信息,请告诉我们!
另外......请原谅我的代码看起来多乱以及所有评论块.当我正在学习一些新东西时,我是一个很重要的笔记...我会在不久的将来让所有东西变得更加诡异和清洁:)
我的代码:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Scarlett Dbus Service. Implemented via MPRIS D-Bus Interface Specification."""
from __future__ import with_statement, division, absolute_import
import os
import sys
from scarlett_os.exceptions import SubProcessError
from scarlett_os.exceptions import TimeOutError
import logging
from scarlett_os.internal.gi import GObject
from scarlett_os.internal.gi import GLib
logger = logging.getLogger(__name__)
def check_pid(pid):
"""Check For the existence of a unix pid."""
try:
os.kill(pid, 0)
except OSError:
return False
else:
return True
class Subprocess(GObject.GObject):
"""
GObject API for handling child processes.
:param command: The command to be run as a subprocess.
:param fork: If `True` this process will be detached from its parent and
run independent. This means that no excited-signal will be emited.
:type command: `list`
:type fork: `bool`
"""
__gtype_name__ = 'Subprocess'
__gsignals__ = {
'exited': (GObject.SignalFlags.RUN_LAST, None, (GObject.TYPE_INT, GObject.TYPE_INT))
}
def __init__(self, command, name=None, fork=False, run_check_command=True):
"""Create instance of Subprocess."""
GObject.GObject.__init__(self)
self.process = None
self.pid = None
if not fork:
self.stdout = True
self.stderr = True
else:
self.stdout = False
self.stderr = False
self.forked = fork
# Verify that command is properly formatted
# and each argument is of type str
if run_check_command:
self.check_command_type(command)
self.command = command
self.name = name
logger.debug("command: {}".format(self.command))
logger.debug("name: {}".format(self.name))
logger.debug("forked: {}".format(self.forked))
logger.debug("process: {}".format(self.process))
logger.debug("pid: {}".format(self.pid))
if fork:
self.fork()
# TODO: Add these arguments so we can toggle stdout
# def spawn_command(self, standard_input=False, standard_output=False, standard_error=False):
def spawn_command(self):
# DO_NOT_REAP_CHILD
# Don't reap process automatically so it is possible to detect when it is closed.
return GLib.spawn_async(self.command,
flags=GLib.SpawnFlags.SEARCH_PATH | GLib.SpawnFlags.DO_NOT_REAP_CHILD
)
def map_type_to_command(self, command):
"""Return: Map after applying type to several objects in an array"""
# NOTE: In python3, many processes that iterate over iterables return iterators themselves.
# In most cases, this ends up saving memory, and should make things go faster.
# cause of that, we need to call list() over the map object
return list(map(type, command))
def check_command_type(self, command):
types = self.map_type_to_command(command)
if type(types) is not list:
raise TypeError("Variable types should return a list in python3. Got: {}".format(types))
# NOTE: str is a built-in function (actually a class) which converts its argument to a string.
# string is a module which provides common string operations.
# source: http://stackoverflow.com/questions/2026038/relationship-between-string-module-and-str
for t in types:
if t is not str:
raise TypeError("Executables and arguments must be str objects. types: {}".format(t))
logger.debug("Running Command: %r" % " ".join(command))
return True
def run(self):
"""Run the process."""
# NOTE: DO_NOT_REAP_CHILD: the child will not be automatically reaped;
# you must use g_child_watch_add yourself (or call waitpid or handle `SIGCHLD` yourself),
# or the child will become a zombie.
# source:
# http://valadoc.org/#!api=glib-2.0/GLib.SpawnFlags.DO_NOT_REAP_CHILD
# NOTE: SEARCH_PATH: argv[0] need not be an absolute path, it will be looked for in the user's PATH
# source:
# http://lazka.github.io/pgi-docs/#GLib-2.0/flags.html#GLib.SpawnFlags.SEARCH_PATH
self.pid, self.stdin, self.stdout, self.stderr = self.spawn_command()
logger.debug("command: {}".format(self.command))
logger.debug("stdin: {}".format(self.stdin))
logger.debug("stdout: {}".format(self.stdout))
logger.debug("stderr: {}".format(self.stderr))
logger.debug("pid: {}".format(self.pid))
# close file descriptor
self.pid.close()
print(self.stderr)
# NOTE: GLib.PRIORITY_HIGH = -100
# Use this for high priority event sources.
# It is not used within GLib or GTK+.
watch = GLib.child_watch_add(GLib.PRIORITY_HIGH,
self.pid,
self.exited_cb)
return self.pid
def exited_cb(self, pid, condition):
if not self.forked:
self.emit('exited', pid, condition)
def fork(self):
"""Fork the process."""
try:
# first fork
pid = os.fork()
if pid > 0:
logger.debug('pid greater than 0 first time')
sys.exit(0)
except OSError as e:
logger.error('Error forking process first time')
sys.exit(1)
# Change the current working directory to path.
os.chdir("/")
# Description: setsid() creates a new session if the calling process is not a process group leader.
# The calling process is the leader of the new session,
# the process group leader of the new process group,
# and has no controlling terminal.
# The process group ID and session ID of the calling process are set to the PID of the calling process.
# The calling process will be the only process in this new process group and in this new session.
# Return Value: On success, the (new) session ID of the calling process is returned.
# On error, (pid_t) -1 is returned, and errno is set to indicate the error.
os.setsid()
# Set the current numeric umask and return the previous umask.
os.umask(0)
try:
# second fork
pid = os.fork()
if pid > 0:
logger.debug('pid greater than 0 second time')
sys.exit(0)
except OSError as e:
logger.error('Error forking process second time')
sys.exit(1)
我的测试:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
test_subprocess
----------------------------------
"""
import os
import sys
import pytest
import scarlett_os
# import signal
# import builtins
# import re
class TestScarlettSubprocess(object):
'''Units tests for Scarlett Subprocess, subclass of GObject.Gobject.'''
def test_check_pid_os_error(self, mocker):
# Feels like mocks are leaking into other tests,
# stop mock before starting each test function
mocker.stopall()
# Setup mock objects
kill_mock = mocker.MagicMock(name=__name__ + "_kill_mock_OSError")
kill_mock.side_effect = OSError
# patch things
mocker.patch.object(scarlett_os.subprocess.os, 'kill', kill_mock)
# When OSError occurs, throw False
assert not scarlett_os.subprocess.check_pid(4353634632623)
# Verify that os.kill only called once
assert kill_mock.call_count == 1
def test_check_pid(self, mocker):
# Feels like mocks are leaking into other tests,
# stop mock before starting each test function
mocker.stopall()
# Setup mock objects
kill_mock = mocker.MagicMock(name=__name__ + "_kill_mock")
mocker.patch.object(scarlett_os.subprocess.os, 'kill', kill_mock)
result = scarlett_os.subprocess.check_pid(123)
assert kill_mock.called
# NOTE: test against signal 0
# sending the signal 0 to a given PID just checks if any
# process with the given PID is running and you have the
# permission to send a signal to it.
kill_mock.assert_called_once_with(123, 0)
assert result is True
# FIXME: I THINK THIS GUYS IS LEAKING MOCK OBJECTS
def test_subprocess_init(self, mocker):
# Feels like mocks are leaking into other tests,
# stop mock before starting each test function
mocker.stopall()
mock_check_command_type = MagicMock(name="mock_check_command_type")
mock_check_command_type.return_value = True
mock_fork = mocker.MagicMock(name="mock_fork")
mock_logging_debug = mocker.MagicMock(name="mock_logging_debug")
# mock
mocker.patch.object(scarlett_os.subprocess.logging.Logger, 'debug', mock_logging_debug)
mocker.patch.object(scarlett_os.subprocess.Subprocess, 'check_command_type', mock_check_command_type)
mocker.patch.object(scarlett_os.subprocess.Subprocess, 'fork', mock_fork)
# NOTE: On purpose this is an invalid cmd. Should be of type array
test_command = ['who']
test_name = 'test_who'
test_fork = False
s_test = scarlett_os.subprocess.Subprocess(test_command,
name=test_name,
fork=test_fork)
# action
assert s_test.check_command_type(test_command) is True
mock_check_command_type.assert_called_with(['who'])
assert not s_test.process
assert not s_test.pid
assert s_test.name == 'test_who'
assert not s_test.forked
assert s_test.stdout is True
assert s_test.stderr is True
mock_logging_debug.assert_any_call("command: ['who']")
mock_logging_debug.assert_any_call("name: test_who")
mock_logging_debug.assert_any_call("forked: False")
mock_logging_debug.assert_any_call("process: None")
mock_logging_debug.assert_any_call("pid: None")
mock_fork.assert_not_called()
# FIXME: I THINK THIS GUYS IS LEAKING MOCK OBJECTS
def test_subprocess_map_type_to_command(self, mocker):
"""Using the mock.patch decorator (removes the need to import builtins)"""
# Feels like mocks are leaking into other tests,
# stop mock before starting each test function
mocker.stopall()
mock_check_command_type = mocker.MagicMock(name="mock_check_command_type")
mock_check_command_type.return_value = True
mock_fork = mocker.MagicMock(name="mock_fork")
mock_logging_debug = mocker.MagicMock(name="mock_logging_debug")
# mock
mocker.patch.object(scarlett_os.subprocess.logging.Logger, 'debug', mock_logging_debug)
mocker.patch.object(scarlett_os.subprocess.Subprocess, 'check_command_type', mock_check_command_type)
mocker.patch.object(scarlett_os.subprocess.Subprocess, 'fork', mock_fork)
# NOTE: On purpose this is an invalid cmd. Should be of type array
test_command = ["who", "-b"]
test_name = 'test_who'
test_fork = False
# create subprocess object
s_test = scarlett_os.subprocess.Subprocess(test_command,
name=test_name,
fork=test_fork)
mocker.spy(s_test, 'map_type_to_command')
assert isinstance(s_test.map_type_to_command(test_command), list)
assert s_test.map_type_to_command.call_count == 1
assert s_test.check_command_type(test_command)
assert s_test.check_command_type(
test_command) == mock_check_command_type.return_value
def test_subprocess_check_command_type(self, mocker):
"""Using the mock.patch decorator (removes the need to import builtins)"""
# Feels like mocks are leaking into other tests,
# stop mock before starting each test function
mocker.stopall()
test_command = ["who", "-b"]
test_name = 'test_who'
test_fork = False
# mock
mock_map_type_to_command = mocker.MagicMock(name="mock_map_type_to_command")
# mock_map_type_to_command.return_value = int
mock_map_type_to_command.side_effect = [int, [int, int]]
mock_fork = mocker.MagicMock(name="mock_fork")
mock_logging_debug = mocker.MagicMock(name="mock_logging_debug")
mocker.patch.object(scarlett_os.subprocess.logging.Logger, 'debug', mock_logging_debug)
mocker.patch.object(scarlett_os.subprocess.Subprocess, 'map_type_to_command', mock_map_type_to_command)
mocker.patch.object(scarlett_os.subprocess.Subprocess, 'fork', mock_fork)
# action
with pytest.raises(TypeError) as excinfo:
scarlett_os.subprocess.Subprocess(test_command,
name=test_name,
fork=test_fork,
run_check_command=True)
assert str(
excinfo.value) == "Variable types should return a list in python3. Got: <class 'int'>"
with pytest.raises(TypeError) as excinfo:
scarlett_os.subprocess.Subprocess(test_command,
name=test_name,
fork=test_fork,
run_check_command=True)
assert str(
excinfo.value) == "Executables and arguments must be str objects. types: <class 'int'>"
我的文件夹结构(注意我删除了一些东西,因为它过于冗长):
pi@0728af726f1f:~/dev/bossjones-github/scarlett_os$ tree -I *.pyc
.
??? requirements_dev.txt
??? requirements_test_experimental.txt
??? requirements_test.txt
??? requirements.txt
??? scarlett_os
? ??? automations
? ? ??? __init__.py
? ? ??? __pycache__
? ??? commands.py
? ??? compat.py
? ??? config.py
? ??? const.py
? ??? core.py
? ??? emitter.py
? ??? exceptions.py
? ??? __init__.py
? ??? internal
? ? ??? debugger.py
? ? ??? deps.py
? ? ??? encoding.py
? ? ??? formatting.py
? ? ??? gi.py
? ? ??? __init__.py
? ? ??? path.py
? ? ??? __pycache__
? ? ??? system_utils.py
? ??? listener.py
? ??? loader.py
? ??? logger.py
? ??? log.py
? ??? __main__.py
? ??? mpris.py
? ??? player.py
? ??? __pycache__
? ??? receiver.py
? ??? speaker.py
? ??? subprocess.py
? ??? tasker.py
? ??? tools
? ? ??? __init__.py
? ? ??? package.py
? ? ??? __pycache__
? ? ??? verify.py
? ??? utility
? ??? audio.py
? ??? dbus_runner.py
? ??? dbus_utils.py
? ??? distance.py
? ??? dt.py
? ??? file.py
? ??? generators.py
? ??? gnome.py
? ??? __init__.py
? ??? location.py
? ??? __pycache__
? ??? temperature.py
? ??? threadmanager.py
? ??? thread.py
? ??? unit_system.py
? ??? yaml.py
??? setup.cfg
??? setup.py
??? tests
? ??? common_integration.py
? ??? common.py
? ??? helpers
? ? ??? __init__.py
? ? ??? __pycache__
? ? ??? test_config_validation.py
? ? ??? test_entity.py
? ? ??? test_init.py
? ??? __init__.py
? ??? integration
? ? ??? baseclass.py
? ? ??? conftest.py
? ? ??? __init__.py
? ? ??? __pycache__
? ? ??? README.md
? ? ??? stubs.py
? ? ??? test_integration_end_to_end.py
? ? ??? test_integration_listener.py
? ? ??? test_integration_mpris.py
? ? ??? test_integration_player.py
? ? ??? test_integration_tasker.py
? ? ??? test_integration_tasker.py.enable_sound.diff
? ? ??? test_integration_threadmanager.py
? ??? internal
? ? ??? __init__.py
? ? ??? __pycache__
? ? ??? test_deps.py
? ? ??? test_encoding.py
? ? ??? test_path.py
? ??? performancetests
? ? ??? baseclass.py
? ? ??? __init__.py
? ? ??? __pycache__
? ??? __pycache__
? ??? run_all_tests
? ??? run_dbus_tests.sh
? ??? test_cli.py
? ??? test_commands.py
? ??? testing_config
? ? ??? custom_automations
? ? ??? light
? ? ? ??? test.py
? ? ??? switch
? ? ??? test.py
? ??? test_listener.py
? ??? test_mpris.py
? ??? test_player.py
? ??? test_scarlett_os.py
? ??? test_speaker.py
? ??? test_subprocess.py
? ??? test_tasker.py
? ??? test_threadmanager.py
? ??? tools_common.py
? ??? unit_scarlett_os.py
? ??? utility
? ??? __init__.py
? ??? __pycache__
? ??? test_dbus_utils.py
? ??? test_distance.py
? ??? test_dt.py
? ??? test_gnome.py
? ??? test_init.py
? ??? test_location.py
? ??? test_unit_system.py
? ??? test_yaml.py
67 directories, 256 files
pi@0728af726f1f:~/dev/bossjones-github/scarlett_os$
其他细节(仅在不兼容的情况下扩展pip冻结):
# Python version
Python 3.5.2
# Pytest version ( and plugins )
pytest==3.0.7
pytest-benchmark==3.1.0a2
pytest-catchlog==1.2.2
pytest-cov==2.4.0
pytest-ipdb==0.1.dev2
pytest-leaks==0.2.2
pytest-mock==1.6.0
pytest-rerunfailures==2.1.0
pytest-sugar==0.8.0
pytest-timeout==1.2.0
python-dateutil==2.6.0
python-dbusmock==0.16.7
# Pip Freeze ( Just in case )
alabaster==0.7.10
appdirs==1.4.3
argh==0.26.2
asn1crypto==0.22.0
astroid==1.5.2
Babel==2.4.0
bleach==2.0.0
bumpversion==0.5.3
cffi==1.10.0
click==6.7
click-plugins==1.0.3
colorama==0.3.7
colorlog==2.10.0
coverage==4.3.4
coveralls==1.1
cryptography==1.8.1
Cython==0.25.2
decorator==4.0.11
docopt==0.6.2
docutils==0.13.1
ecdsa==0.13
entrypoints==0.2.2
Fabric3==1.12.post1
fancycompleter==0.7
fields==5.0.0
flake8==3.3.0
flake8-docstrings==1.0.3
flake8-polyfill==1.0.1
freezegun==0.3.8
gnureadline==6.3.3
graphviz==0.6
html5lib==0.999999999
hunter==1.4.1
idna==2.5
imagesize==0.7.1
ipdb==0.10.2
ipykernel==4.6.1
ipython==6.0.0
ipython-genutils==0.2.0
ipywidgets==6.0.0
isort==4.2.5
jedi==0.10.2
Jinja2==2.9.6
jsonschema==2.6.0
jupyter==1.0.0
jupyter-client==5.0.1
jupyter-console==5.1.0
jupyter-core==4.3.0
lazy-object-proxy==1.2.2
MarkupSafe==1.0
mccabe==0.6.1
mistune==0.7.4
mock==2.0.0
mock-open==1.3.1
mypy-lang==0.4.6
nbconvert==5.1.1
nbformat==4.3.0
notebook==5.0.0
objgraph==3.1.0
ordereddict==1.1
packaging==16.8
pandocfilters==1.4.1
paramiko==1.18.2
pathtools==0.1.2
pbr==1.10.0
pdbpp==0.8.3
pexpect==4.2.1
pickleshare==0.7.4
pluggy==0.4.0
plumbum==1.6.3
prompt-toolkit==1.0.14
psutil==5.2.2
ptyprocess==0.5.1
py==1.4.33
py-cpuinfo==3.2.0
pyasn1==0.2.3
pycodestyle==2.3.1
pycparser==2.17
pycrypto==2.6.1
pydbus==0.6.0
pydocstyle==2.0.0
pyflakes==1.5.0
pygal==2.3.1
pygaljs==1.0.1
Pygments==2.2.0
pygobject==3.22.0
pylint==1.7.1
pyparsing==2.2.0
pystuck==0.8.5
pytest==3.0.7
pytest-benchmark==3.1.0a2
pytest-catchlog==1.2.2
pytest-cov==2.4.0
pytest-ipdb==0.1.dev2
pytest-leaks==0.2.2
pytest-mock==1.6.0
pytest-rerunfailures==2.1.0
pytest-sugar==0.8.0
pytest-timeout==1.2.0
python-dateutil==2.6.0
python-dbusmock==0.16.7
pytz==2017.2
PyYAML==3.12
pyzmq==16.0.2
qtconsole==4.3.0
requests==2.13.0
requests-mock==1.3.0
rpyc==3.3.0
-e git+git@github.com:bossjones/scarlett_os.git@c14ffcde608da12f5c2d4d9b81a63c7e618b3eed#egg=scarlett_os
simplegeneric==0.8.1
six==1.10.0
snowballstemmer==1.2.1
Sphinx==1.5.5
stevedore==1.18.0
termcolor==1.1.0
terminado==0.6
testpath==0.3
tornado==4.5.1
tox==2.7.0
traitlets==4.3.2
typing==3.6.1
virtualenv==15.0.3
virtualenv-clone==0.2.6
virtualenvwrapper==4.7.2
voluptuous==0.9.3
watchdog==0.8.3
wcwidth==0.1.7
webencodings==0.5.1
widgetsnbextension==2.0.0
wmctrl==0.3
wrapt==1.10.10
xdot==0.7
编辑:(还有一个细节,为什么我不是我们的补丁上下文管理器或装饰器？)
pytest-mock他们的设计选择有一个非常好的部分,以及为什么他们决定放弃嵌套with在彼此之上的嵌套语句和装饰器.链接在这里,但是为了以下情况,我在这里提一下:
- excessive nesting of with statements breaking the flow of test
- receiving the mocks as parameters doesn't mix nicely with pytest's approach of naming fixtures as parameters, or pytest.mark.parametrize;
因此,如果可以使用此插件使我的代码更清洁,我想实现这一点.如果那是不可能的,那么我可能需要重新考虑事情.
您得到的错误是测试中的代码命中AttributeError而不是TypeError.
细节是某个对象被假定有一个.typename成员，但它没有。
我怀疑一旦你解决了这个谜题，剩下的事情就会好起来。
我看到有人打开了https://github.com/pytest-dev/pytest-mock/issues/84（你？），让我们等待 pytest 开发人员来分析它，以防两个插件之间存在不兼容。
为什么不使用函数装饰器或上下文管理器运行您的模拟以确保它们被关闭？例如，在test_subprocess_map_type_to_command, 而不是执行所有这些来模拟scarlett_os.subprocess.Subprocess.check_command_type：
mock_check_command_type = mocker.MagicMock(name="mock_check_command_type")
mock_check_command_type.return_value = True
mocker.patch.object(scarlett_os.subprocess.Subprocess, 'check_command_type', mock_check_command_type)
为什么不直接使用上下文管理器并执行以下操作：
with mock.patch.object(
scarlett_os.subprocess.Subprocess,
'check_command_type',
return_value=True):
它会更加简洁，并且会确保你的模拟不会泄漏。
更好的是，如果您的模拟适用于整个函数（我认为其中一些适用），您可以在函数顶部使用装饰器：
@mock.patch('scarlett_os.subprocess.Subprocess.check_command_type',
return_value=True)