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from unittest.mock import MagicMock, Mock, sentinel
import pytest
from celery import states
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
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