221 lines
7.3 KiB
Python
221 lines
7.3 KiB
Python
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"""Base class for notebook tests."""
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from __future__ import print_function
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from binascii import hexlify
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from contextlib import contextmanager
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import errno
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import os
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import sys
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from threading import Thread, Event
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import time
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from unittest import TestCase
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pjoin = os.path.join
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from unittest.mock import patch
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import requests
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from tornado.ioloop import IOLoop
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import zmq
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import jupyter_core.paths
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from traitlets.config import Config
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from ..notebookapp import NotebookApp
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from ..utils import url_path_join
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from ipython_genutils.tempdir import TemporaryDirectory
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MAX_WAITTIME = 30 # seconds to wait for notebook server to start
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POLL_INTERVAL = 0.1 # time between attempts
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# TimeoutError is a builtin on Python 3. This can be removed when we stop
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# supporting Python 2.
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class TimeoutError(Exception):
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pass
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class NotebookTestBase(TestCase):
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"""A base class for tests that need a running notebook.
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This create some empty config and runtime directories
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and then starts the notebook server with them.
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"""
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port = 12341
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config = None
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# run with a base URL that would be escaped,
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# to test that we don't double-escape URLs
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url_prefix = '/a%40b/'
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@classmethod
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def wait_until_alive(cls):
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"""Wait for the server to be alive"""
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url = cls.base_url() + 'api/contents'
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for _ in range(int(MAX_WAITTIME/POLL_INTERVAL)):
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try:
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requests.get(url)
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except Exception as e:
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if not cls.notebook_thread.is_alive():
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raise RuntimeError("The notebook server failed to start")
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time.sleep(POLL_INTERVAL)
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else:
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return
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raise TimeoutError("The notebook server didn't start up correctly.")
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@classmethod
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def wait_until_dead(cls):
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"""Wait for the server process to terminate after shutdown"""
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cls.notebook_thread.join(timeout=MAX_WAITTIME)
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if cls.notebook_thread.is_alive():
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raise TimeoutError("Undead notebook server")
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@classmethod
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def auth_headers(cls):
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headers = {}
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if cls.token:
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headers['Authorization'] = 'token %s' % cls.token
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return headers
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@classmethod
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def request(cls, verb, path, **kwargs):
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"""Send a request to my server
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with authentication and everything.
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"""
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headers = kwargs.setdefault('headers', {})
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headers.update(cls.auth_headers())
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response = requests.request(verb,
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url_path_join(cls.base_url(), path),
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**kwargs)
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return response
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@classmethod
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def get_patch_env(cls):
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return {
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'HOME': cls.home_dir,
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'PYTHONPATH': os.pathsep.join(sys.path),
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'IPYTHONDIR': pjoin(cls.home_dir, '.ipython'),
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'JUPYTER_NO_CONFIG': '1', # needed in the future
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'JUPYTER_CONFIG_DIR' : cls.config_dir,
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'JUPYTER_DATA_DIR' : cls.data_dir,
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'JUPYTER_RUNTIME_DIR': cls.runtime_dir,
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}
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@classmethod
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def get_argv(cls):
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return []
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@classmethod
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def setup_class(cls):
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cls.tmp_dir = TemporaryDirectory()
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def tmp(*parts):
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path = os.path.join(cls.tmp_dir.name, *parts)
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try:
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os.makedirs(path)
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except OSError as e:
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if e.errno != errno.EEXIST:
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raise
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return path
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cls.home_dir = tmp('home')
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data_dir = cls.data_dir = tmp('data')
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config_dir = cls.config_dir = tmp('config')
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runtime_dir = cls.runtime_dir = tmp('runtime')
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cls.notebook_dir = tmp('notebooks')
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cls.env_patch = patch.dict('os.environ', cls.get_patch_env())
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cls.env_patch.start()
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# Patch systemwide & user-wide data & config directories, to isolate
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# the tests from oddities of the local setup. But leave Python env
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# locations alone, so data files for e.g. nbconvert are accessible.
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# If this isolation isn't sufficient, you may need to run the tests in
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# a virtualenv or conda env.
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cls.path_patch = patch.multiple(
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jupyter_core.paths,
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SYSTEM_JUPYTER_PATH=[tmp('share', 'jupyter')],
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SYSTEM_CONFIG_PATH=[tmp('etc', 'jupyter')],
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)
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cls.path_patch.start()
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config = cls.config or Config()
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config.NotebookNotary.db_file = ':memory:'
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cls.token = hexlify(os.urandom(4)).decode('ascii')
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started = Event()
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def start_thread():
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try:
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app = cls.notebook = NotebookApp(
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port=cls.port,
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port_retries=0,
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open_browser=False,
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config_dir=cls.config_dir,
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data_dir=cls.data_dir,
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runtime_dir=cls.runtime_dir,
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notebook_dir=cls.notebook_dir,
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base_url=cls.url_prefix,
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config=config,
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allow_root=True,
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token=cls.token,
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)
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if 'asyncio' in sys.modules:
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app._init_asyncio_patch()
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import asyncio
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asyncio.set_event_loop(asyncio.new_event_loop())
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# don't register signal handler during tests
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app.init_signal = lambda : None
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# clear log handlers and propagate to root for nose to capture it
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# needs to be redone after initialize, which reconfigures logging
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app.log.propagate = True
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app.log.handlers = []
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app.initialize(argv=cls.get_argv())
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app.log.propagate = True
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app.log.handlers = []
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loop = IOLoop.current()
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loop.add_callback(started.set)
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app.start()
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finally:
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# set the event, so failure to start doesn't cause a hang
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started.set()
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app.session_manager.close()
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cls.notebook_thread = Thread(target=start_thread)
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cls.notebook_thread.daemon = True
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cls.notebook_thread.start()
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started.wait()
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cls.wait_until_alive()
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@classmethod
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def teardown_class(cls):
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cls.notebook.stop()
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cls.wait_until_dead()
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cls.env_patch.stop()
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cls.path_patch.stop()
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cls.tmp_dir.cleanup()
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# cleanup global zmq Context, to ensure we aren't leaving dangling sockets
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def cleanup_zmq():
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zmq.Context.instance().term()
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t = Thread(target=cleanup_zmq)
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t.daemon = True
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t.start()
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t.join(5) # give it a few seconds to clean up (this should be immediate)
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# if term never returned, there's zmq stuff still open somewhere, so shout about it.
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if t.is_alive():
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raise RuntimeError("Failed to teardown zmq Context, open sockets likely left lying around.")
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@classmethod
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def base_url(cls):
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return 'http://localhost:%i%s' % (cls.port, cls.url_prefix)
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@contextmanager
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def assert_http_error(status, msg=None):
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try:
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yield
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except requests.HTTPError as e:
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real_status = e.response.status_code
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assert real_status == status, \
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"Expected status %d, got %d" % (status, real_status)
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if msg:
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assert msg in str(e), e
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else:
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assert False, "Expected HTTP error status"
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