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from itertools import count
from typing import TYPE_CHECKING, Optional, Type
from unittest.mock import Mock
from kombu.transport import base
from kombu.utils import json
if TYPE_CHECKING:
from types import TracebackType
class _ContextMock(Mock):
"""Dummy class implementing __enter__ and __exit__
as the :keyword:`with` statement requires these to be implemented
in the class, not just the instance."""
def __enter__(self):
return self
def __exit__(
self,
exc_type: Optional[Type[BaseException]],
exc_val: Optional[BaseException],
exc_tb: Optional['TracebackType']
) -> None:
pass
def ContextMock(*args, **kwargs):
"""Mock that mocks :keyword:`with` statement contexts."""
obj = _ContextMock(*args, **kwargs)
obj.attach_mock(_ContextMock(), '__enter__')
obj.attach_mock(_ContextMock(), '__exit__')
obj.__enter__.return_value = obj
# if __exit__ return a value the exception is ignored,
# so it must return None here.
obj.__exit__.return_value = None
return obj
def PromiseMock(*args, **kwargs):
m = Mock(*args, **kwargs)
def on_throw(exc=None, *args, **kwargs):
if exc:
raise exc
raise
m.throw.side_effect = on_throw
m.set_error_state.side_effect = on_throw
m.throw1.side_effect = on_throw
return m
class MockPool:
def __init__(self, value=None):
self.value = value or ContextMock()
def acquire(self, **kwargs):
return self.value
class Message(base.Message):
def __init__(self, *args, **kwargs):
self.throw_decode_error = kwargs.get('throw_decode_error', False)
super().__init__(*args, **kwargs)
def decode(self):
if self.throw_decode_error:
raise ValueError("can't decode message")
return super().decode()
class Channel(base.StdChannel):
open = True
throw_decode_error = False
_ids = count(1)
def __init__(self, connection):
self.connection = connection
self.called = []
self.deliveries = count(1)
self.to_deliver = []
self.events = {'basic_return': set()}
self.channel_id = next(self._ids)
def _called(self, name):
self.called.append(name)
def __contains__(self, key):
return key in self.called
def exchange_declare(self, *args, **kwargs):
self._called('exchange_declare')
def prepare_message(self, body, priority=0, content_type=None,
content_encoding=None, headers=None, properties={}):
self._called('prepare_message')
return {'body': body,
'headers': headers,
'properties': properties,
'priority': priority,
'content_type': content_type,
'content_encoding': content_encoding}
def basic_publish(self, message, exchange='', routing_key='',
mandatory=False, immediate=False, **kwargs):
self._called('basic_publish')
return message, exchange, routing_key
def exchange_delete(self, *args, **kwargs):
self._called('exchange_delete')
def queue_declare(self, *args, **kwargs):
self._called('queue_declare')
def queue_bind(self, *args, **kwargs):
self._called('queue_bind')
def queue_unbind(self, *args, **kwargs):
self._called('queue_unbind')
def queue_delete(self, queue, if_unused=False, if_empty=False, **kwargs):
self._called('queue_delete')
def basic_get(self, *args, **kwargs):
self._called('basic_get')
try:
return self.to_deliver.pop()
except IndexError:
pass
def queue_purge(self, *args, **kwargs):
self._called('queue_purge')
def basic_consume(self, *args, **kwargs):
self._called('basic_consume')
def basic_cancel(self, *args, **kwargs):
self._called('basic_cancel')
def basic_ack(self, *args, **kwargs):
self._called('basic_ack')
def basic_recover(self, requeue=False):
self._called('basic_recover')
def exchange_bind(self, *args, **kwargs):
self._called('exchange_bind')
def exchange_unbind(self, *args, **kwargs):
self._called('exchange_unbind')
def close(self):
self._called('close')
def message_to_python(self, message, *args, **kwargs):
self._called('message_to_python')
return Message(body=json.dumps(message),
channel=self,
delivery_tag=next(self.deliveries),
throw_decode_error=self.throw_decode_error,
content_type='application/json',
content_encoding='utf-8')
def flow(self, active):
self._called('flow')
def basic_reject(self, delivery_tag, requeue=False):
if requeue:
return self._called('basic_reject:requeue')
return self._called('basic_reject')
def basic_qos(self, prefetch_size=0, prefetch_count=0,
apply_global=False):
self._called('basic_qos')
class Connection:
connected = True
def __init__(self, client):
self.client = client
def channel(self):
return Channel(self)
class Transport(base.Transport):
def establish_connection(self):
return Connection(self.client)
def create_channel(self, connection):
return connection.channel()
def drain_events(self, connection, **kwargs):
return 'event'
def close_connection(self, connection):
connection.connected = False
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