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from unittest.mock import MagicMock, Mock, sentinel
from urllib.parse import urlparse
import pytest
from kombu.utils.encoding import str_to_bytes
from celery import states, uuid
from celery.app import backends
from celery.backends import couchdb as module
from celery.backends.couchdb import CouchBackend
from celery.exceptions import ImproperlyConfigured
try:
import pycouchdb
except ImportError:
pycouchdb = None
COUCHDB_CONTAINER = 'celery_container'
pytest.importorskip('pycouchdb')
class test_CouchBackend:
def setup_method(self):
self.Server = self.patching('pycouchdb.Server')
self.backend = CouchBackend(app=self.app)
def test_init_no_pycouchdb(self):
"""test init no pycouchdb raises"""
prev, module.pycouchdb = module.pycouchdb, None
try:
with pytest.raises(ImproperlyConfigured):
CouchBackend(app=self.app)
finally:
module.pycouchdb = prev
def test_get_container_exists(self):
self.backend._connection = sentinel._connection
connection = self.backend.connection
assert connection is sentinel._connection
self.Server.assert_not_called()
def test_get(self):
"""test_get
CouchBackend.get should return and take two params
db conn to couchdb is mocked.
"""
x = CouchBackend(app=self.app)
x._connection = Mock()
get = x._connection.get = MagicMock()
assert x.get('1f3fab') == get.return_value['value']
x._connection.get.assert_called_once_with('1f3fab')
def test_get_non_existent_key(self):
x = CouchBackend(app=self.app)
x._connection = Mock()
get = x._connection.get = MagicMock()
get.side_effect = pycouchdb.exceptions.NotFound
assert x.get('1f3fab') is None
x._connection.get.assert_called_once_with('1f3fab')
@pytest.mark.parametrize("key", ['1f3fab', b'1f3fab'])
def test_set(self, key):
x = CouchBackend(app=self.app)
x._connection = Mock()
x._set_with_state(key, 'value', states.SUCCESS)
x._connection.save.assert_called_once_with({'_id': '1f3fab',
'value': 'value'})
@pytest.mark.parametrize("key", ['1f3fab', b'1f3fab'])
def test_set_with_conflict(self, key):
x = CouchBackend(app=self.app)
x._connection = Mock()
x._connection.save.side_effect = (pycouchdb.exceptions.Conflict, None)
get = x._connection.get = MagicMock()
x._set_with_state(key, 'value', states.SUCCESS)
x._connection.get.assert_called_once_with('1f3fab')
x._connection.get('1f3fab').__setitem__.assert_called_once_with(
'value', 'value')
x._connection.save.assert_called_with(get('1f3fab'))
assert x._connection.save.call_count == 2
def test_delete(self):
"""test_delete
CouchBackend.delete should return and take two params
db conn to pycouchdb is mocked.
TODO Should test on key not exists
"""
x = CouchBackend(app=self.app)
x._connection = Mock()
mocked_delete = x._connection.delete = Mock()
mocked_delete.return_value = None
# should return None
assert x.delete('1f3fab') is None
x._connection.delete.assert_called_once_with('1f3fab')
def test_backend_by_url(self, url='couchdb://myhost/mycoolcontainer'):
from celery.backends.couchdb import CouchBackend
backend, url_ = backends.by_url(url, self.app.loader)
assert backend is CouchBackend
assert url_ == url
def test_backend_params_by_url(self):
url = 'couchdb://johndoe:mysecret@myhost:123/mycoolcontainer'
with self.Celery(backend=url) as app:
x = app.backend
assert x.container == 'mycoolcontainer'
assert x.host == 'myhost'
assert x.username == 'johndoe'
assert x.password == 'mysecret'
assert x.port == 123
class CouchSessionMock:
"""
Mock for `requests.session` that emulates couchdb storage.
"""
_store = {}
def request(self, method, url, stream=False, data=None, params=None,
headers=None, **kw):
tid = urlparse(url).path.split("/")[-1]
response = Mock()
response.headers = {"content-type": "application/json"}
response.status_code = 200
response.content = b''
if method == "GET":
if tid not in self._store:
return self._not_found_response()
response.content = self._store.get(tid)
elif method == "PUT":
self._store[tid] = data
response.content = str_to_bytes(f'{{"ok":true,"id":"{tid}","rev":"1-revid"}}')
elif method == "HEAD":
if tid not in self._store:
return self._not_found_response()
response.headers.update({"etag": "1-revid"})
elif method == "DELETE":
if tid not in self._store:
return self._not_found_response()
del self._store[tid]
response.content = str_to_bytes(f'{{"ok":true,"id":"{tid}","rev":"1-revid"}}')
else:
raise NotImplementedError(f"CouchSessionMock.request() does not handle {method} method")
return response
def _not_found_response(self):
response = Mock()
response.headers = {"content-type": "application/json"}
response.status_code = 404
response.content = str_to_bytes('{"error":"not_found","reason":"missing"}')
return response
class test_CouchBackend_result:
def setup_method(self):
self.backend = CouchBackend(app=self.app)
resource = pycouchdb.resource.Resource("resource-url", session=CouchSessionMock())
self.backend._connection = pycouchdb.client.Database(resource, "container")
def test_get_set_forget(self):
tid = uuid()
self.backend.store_result(tid, "successful-result", states.SUCCESS)
assert self.backend.get_state(tid) == states.SUCCESS
assert self.backend.get_result(tid) == "successful-result"
self.backend.forget(tid)
assert self.backend.get_state(tid) == states.PENDING
def test_mark_as_started(self):
tid = uuid()
self.backend.mark_as_started(tid)
assert self.backend.get_state(tid) == states.STARTED
def test_mark_as_revoked(self):
tid = uuid()
self.backend.mark_as_revoked(tid)
assert self.backend.get_state(tid) == states.REVOKED
def test_mark_as_retry(self):
tid = uuid()
try:
raise KeyError('foo')
except KeyError as exception:
import traceback
trace = '\n'.join(traceback.format_stack())
self.backend.mark_as_retry(tid, exception, traceback=trace)
assert self.backend.get_state(tid) == states.RETRY
assert isinstance(self.backend.get_result(tid), KeyError)
assert self.backend.get_traceback(tid) == trace
def test_mark_as_failure(self):
tid = uuid()
try:
raise KeyError('foo')
except KeyError as exception:
import traceback
trace = '\n'.join(traceback.format_stack())
self.backend.mark_as_failure(tid, exception, traceback=trace)
assert self.backend.get_state(tid) == states.FAILURE
assert isinstance(self.backend.get_result(tid), KeyError)
assert self.backend.get_traceback(tid) == trace
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