forked from MirrorHub/synapse
Merge pull request #38 from matrix-org/new_state_resolution
New state resolution
This commit is contained in:
Mark Haines
commit
1251d017c1
2 changed files with 441 additions and 121 deletions
132
synapse/state.py
132
synapse/state.py
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@ -19,6 +19,7 @@ from twisted.internet import defer
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from synapse.util.logutils import log_function
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from synapse.util.async import run_on_reactor
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from synapse.api.constants import EventTypes
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from synapse.api.errors import AuthError
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from synapse.events.snapshot import EventContext
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from collections import namedtuple
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@ -36,12 +37,16 @@ def _get_state_key_from_event(event):
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KeyStateTuple = namedtuple("KeyStateTuple", ("context", "type", "state_key"))
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AuthEventTypes = (EventTypes.Create, EventTypes.Member, EventTypes.PowerLevels,)
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class StateHandler(object):
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""" Responsible for doing state conflict resolution.
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"""
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def __init__(self, hs):
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self.store = hs.get_datastore()
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self.hs = hs
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@defer.inlineCallbacks
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def get_current_state(self, room_id, event_type=None, state_key=""):
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@ -210,64 +215,93 @@ class StateHandler(object):
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else:
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prev_states = []
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auth_events = {
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k: e for k, e in unconflicted_state.items()
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if k[0] in AuthEventTypes
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}
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try:
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new_state = {}
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new_state.update(unconflicted_state)
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for key, events in conflicted_state.items():
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new_state[key] = self._resolve_state_events(events)
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resolved_state = self._resolve_state_events(
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conflicted_state, auth_events
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)
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except:
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logger.exception("Failed to resolve state")
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raise
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new_state = unconflicted_state
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new_state.update(resolved_state)
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defer.returnValue((None, new_state, prev_states))
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def _get_power_level_from_event_state(self, event, user_id):
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if hasattr(event, "old_state_events") and event.old_state_events:
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key = (EventTypes.PowerLevels, "", )
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power_level_event = event.old_state_events.get(key)
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level = None
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if power_level_event:
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level = power_level_event.content.get("users", {}).get(
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user_id
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)
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if not level:
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level = power_level_event.content.get("users_default", 0)
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return level
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else:
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return 0
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@log_function
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def _resolve_state_events(self, events):
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curr_events = events
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def _resolve_state_events(self, conflicted_state, auth_events):
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""" This is where we actually decide which of the conflicted state to
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use.
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new_powers = [
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self._get_power_level_from_event_state(e, e.user_id)
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for e in curr_events
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]
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We resolve conflicts in the following order:
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1. power levels
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2. memberships
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3. other events.
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"""
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resolved_state = {}
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power_key = (EventTypes.PowerLevels, "")
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if power_key in conflicted_state.items():
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power_levels = conflicted_state[power_key]
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resolved_state[power_key] = self._resolve_auth_events(power_levels)
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new_powers = [
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int(p) if p else 0 for p in new_powers
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]
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auth_events.update(resolved_state)
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max_power = max(new_powers)
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curr_events = [
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z[0] for z in zip(curr_events, new_powers)
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if z[1] == max_power
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]
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if not curr_events:
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raise RuntimeError("Max didn't get a max?")
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elif len(curr_events) == 1:
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return curr_events[0]
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# TODO: For now, just choose the one with the largest event_id.
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return (
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sorted(
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curr_events,
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key=lambda e: hashlib.sha1(
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e.event_id + e.user_id + e.room_id + e.type
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).hexdigest()
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)[0]
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for key, events in conflicted_state.items():
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if key[0] == EventTypes.Member:
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resolved_state[key] = self._resolve_auth_events(
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events,
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auth_events
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)
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auth_events.update(resolved_state)
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for key, events in conflicted_state.items():
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if key not in resolved_state:
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resolved_state[key] = self._resolve_normal_events(
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events, auth_events
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)
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return resolved_state
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def _resolve_auth_events(self, events, auth_events):
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reverse = [i for i in reversed(self._ordered_events(events))]
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auth_events = dict(auth_events)
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prev_event = reverse[0]
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for event in reverse[1:]:
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auth_events[(prev_event.type, prev_event.state_key)] = prev_event
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try:
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# FIXME: hs.get_auth() is bad style, but we need to do it to
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# get around circular deps.
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self.hs.get_auth().check(event, auth_events)
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prev_event = event
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except AuthError:
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return prev_event
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return event
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def _resolve_normal_events(self, events, auth_events):
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for event in self._ordered_events(events):
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try:
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# FIXME: hs.get_auth() is bad style, but we need to do it to
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# get around circular deps.
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self.hs.get_auth().check(event, auth_events)
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return event
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except AuthError:
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pass
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# Use the last event (the one with the least depth) if they all fail
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# the auth check.
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return event
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def _ordered_events(self, events):
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def key_func(e):
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return -int(e.depth), hashlib.sha1(e.event_id).hexdigest()
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return sorted(events, key=key_func)
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@ -16,11 +16,120 @@
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from tests import unittest
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from twisted.internet import defer
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from synapse.events import FrozenEvent
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from synapse.api.auth import Auth
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from synapse.api.constants import EventTypes, Membership
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from synapse.state import StateHandler
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from mock import Mock
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_next_event_id = 1000
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def create_event(name=None, type=None, state_key=None, depth=2, event_id=None,
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prev_events=[], **kwargs):
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global _next_event_id
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if not event_id:
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_next_event_id += 1
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event_id = str(_next_event_id)
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if not name:
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if state_key is not None:
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name = "<%s-%s, %s>" % (type, state_key, event_id,)
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else:
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name = "<%s, %s>" % (type, event_id,)
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d = {
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"event_id": event_id,
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"type": type,
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"sender": "@user_id:example.com",
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"room_id": "!room_id:example.com",
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"depth": depth,
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"prev_events": prev_events,
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}
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if state_key is not None:
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d["state_key"] = state_key
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d.update(kwargs)
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event = FrozenEvent(d)
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return event
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class StateGroupStore(object):
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def __init__(self):
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self._event_to_state_group = {}
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self._group_to_state = {}
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self._next_group = 1
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def get_state_groups(self, event_ids):
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groups = {}
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for event_id in event_ids:
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group = self._event_to_state_group.get(event_id)
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if group:
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groups[group] = self._group_to_state[group]
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return defer.succeed(groups)
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def store_state_groups(self, event, context):
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if context.current_state is None:
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return
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state_events = context.current_state
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if event.is_state():
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state_events[(event.type, event.state_key)] = event
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state_group = context.state_group
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if not state_group:
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state_group = self._next_group
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self._next_group += 1
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self._group_to_state[state_group] = state_events.values()
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self._event_to_state_group[event.event_id] = state_group
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class DictObj(dict):
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def __init__(self, **kwargs):
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super(DictObj, self).__init__(kwargs)
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self.__dict__ = self
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class Graph(object):
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def __init__(self, nodes, edges):
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events = {}
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clobbered = set(events.keys())
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for event_id, fields in nodes.items():
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refs = edges.get(event_id)
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if refs:
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clobbered.difference_update(refs)
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prev_events = [(r, {}) for r in refs]
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else:
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prev_events = []
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events[event_id] = create_event(
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event_id=event_id,
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prev_events=prev_events,
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**fields
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)
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self._leaves = clobbered
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self._events = sorted(events.values(), key=lambda e: e.depth)
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def walk(self):
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return iter(self._events)
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def get_leaves(self):
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return (self._events[i] for i in self._leaves)
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class StateTestCase(unittest.TestCase):
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def setUp(self):
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self.store = Mock(
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@ -29,20 +138,188 @@ class StateTestCase(unittest.TestCase):
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"add_event_hashes",
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]
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)
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hs = Mock(spec=["get_datastore"])
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hs = Mock(spec=["get_datastore", "get_auth", "get_state_handler"])
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hs.get_datastore.return_value = self.store
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hs.get_state_handler.return_value = None
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hs.get_auth.return_value = Auth(hs)
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self.state = StateHandler(hs)
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self.event_id = 0
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@defer.inlineCallbacks
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def test_branch_no_conflict(self):
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graph = Graph(
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nodes={
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"START": DictObj(
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type=EventTypes.Create,
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state_key="",
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depth=1,
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),
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"A": DictObj(
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type=EventTypes.Message,
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depth=2,
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),
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"B": DictObj(
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type=EventTypes.Message,
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depth=3,
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),
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"C": DictObj(
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type=EventTypes.Name,
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state_key="",
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depth=3,
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),
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"D": DictObj(
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type=EventTypes.Message,
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depth=4,
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),
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},
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edges={
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"A": ["START"],
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"B": ["A"],
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"C": ["A"],
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"D": ["B", "C"]
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}
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)
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store = StateGroupStore()
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self.store.get_state_groups.side_effect = store.get_state_groups
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context_store = {}
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for event in graph.walk():
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context = yield self.state.compute_event_context(event)
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store.store_state_groups(event, context)
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context_store[event.event_id] = context
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self.assertEqual(2, len(context_store["D"].current_state))
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@defer.inlineCallbacks
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def test_branch_basic_conflict(self):
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graph = Graph(
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nodes={
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"START": DictObj(
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type=EventTypes.Create,
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state_key="creator",
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content={"membership": "@user_id:example.com"},
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depth=1,
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),
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"A": DictObj(
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type=EventTypes.Member,
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state_key="@user_id:example.com",
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content={"membership": Membership.JOIN},
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membership=Membership.JOIN,
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depth=2,
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),
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"B": DictObj(
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type=EventTypes.Name,
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state_key="",
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depth=3,
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),
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"C": DictObj(
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type=EventTypes.Name,
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state_key="",
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depth=4,
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),
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"D": DictObj(
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type=EventTypes.Message,
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depth=5,
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),
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},
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edges={
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"A": ["START"],
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"B": ["A"],
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"C": ["A"],
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"D": ["B", "C"]
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}
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)
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store = StateGroupStore()
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self.store.get_state_groups.side_effect = store.get_state_groups
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context_store = {}
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for event in graph.walk():
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context = yield self.state.compute_event_context(event)
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store.store_state_groups(event, context)
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context_store[event.event_id] = context
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self.assertSetEqual(
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{"START", "A", "C"},
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{e.event_id for e in context_store["D"].current_state.values()}
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)
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@defer.inlineCallbacks
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def test_branch_have_banned_conflict(self):
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graph = Graph(
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nodes={
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"START": DictObj(
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type=EventTypes.Create,
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state_key="creator",
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content={"membership": "@user_id:example.com"},
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depth=1,
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),
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"A": DictObj(
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type=EventTypes.Member,
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state_key="@user_id:example.com",
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content={"membership": Membership.JOIN},
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membership=Membership.JOIN,
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depth=2,
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),
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"B": DictObj(
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type=EventTypes.Name,
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state_key="",
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depth=3,
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),
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"C": DictObj(
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type=EventTypes.Member,
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state_key="@user_id_2:example.com",
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content={"membership": Membership.BAN},
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membership=Membership.BAN,
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depth=4,
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),
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"D": DictObj(
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type=EventTypes.Name,
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state_key="",
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depth=4,
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sender="@user_id_2:example.com",
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),
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"E": DictObj(
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type=EventTypes.Message,
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depth=5,
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),
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},
|
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edges={
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"A": ["START"],
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"B": ["A"],
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"C": ["B"],
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"D": ["B"],
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"E": ["C", "D"]
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}
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)
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store = StateGroupStore()
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self.store.get_state_groups.side_effect = store.get_state_groups
|
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context_store = {}
|
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|
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for event in graph.walk():
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context = yield self.state.compute_event_context(event)
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store.store_state_groups(event, context)
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context_store[event.event_id] = context
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|
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self.assertSetEqual(
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{"START", "A", "B", "C"},
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{e.event_id for e in context_store["E"].current_state.values()}
|
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)
|
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|
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@defer.inlineCallbacks
|
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def test_annotate_with_old_message(self):
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event = self.create_event(type="test_message", name="event")
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event = create_event(type="test_message", name="event")
|
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|
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old_state = [
|
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self.create_event(type="test1", state_key="1"),
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self.create_event(type="test1", state_key="2"),
|
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self.create_event(type="test2", state_key=""),
|
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create_event(type="test1", state_key="1"),
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create_event(type="test1", state_key="2"),
|
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create_event(type="test2", state_key=""),
|
||||
]
|
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|
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context = yield self.state.compute_event_context(
|
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|
|
@ -62,12 +339,12 @@ class StateTestCase(unittest.TestCase):
|
|||
|
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@defer.inlineCallbacks
|
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def test_annotate_with_old_state(self):
|
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event = self.create_event(type="state", state_key="", name="event")
|
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event = create_event(type="state", state_key="", name="event")
|
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|
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old_state = [
|
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self.create_event(type="test1", state_key="1"),
|
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self.create_event(type="test1", state_key="2"),
|
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self.create_event(type="test2", state_key=""),
|
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create_event(type="test1", state_key="1"),
|
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create_event(type="test1", state_key="2"),
|
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create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
context = yield self.state.compute_event_context(
|
||||
|
|
@ -88,13 +365,12 @@ class StateTestCase(unittest.TestCase):
|
|||
|
||||
@defer.inlineCallbacks
|
||||
def test_trivial_annotate_message(self):
|
||||
event = self.create_event(type="test_message", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="test_message", name="event")
|
||||
|
||||
old_state = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
group_name = "group_name_1"
|
||||
|
|
@ -119,13 +395,12 @@ class StateTestCase(unittest.TestCase):
|
|||
|
||||
@defer.inlineCallbacks
|
||||
def test_trivial_annotate_state(self):
|
||||
event = self.create_event(type="state", state_key="", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="state", state_key="", name="event")
|
||||
|
||||
old_state = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
group_name = "group_name_1"
|
||||
|
|
@ -150,30 +425,21 @@ class StateTestCase(unittest.TestCase):
|
|||
|
||||
@defer.inlineCallbacks
|
||||
def test_resolve_message_conflict(self):
|
||||
event = self.create_event(type="test_message", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="test_message", name="event")
|
||||
|
||||
old_state_1 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test3", state_key="2"),
|
||||
self.create_event(type="test4", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test3", state_key="2"),
|
||||
create_event(type="test4", state_key=""),
|
||||
]
|
||||
|
||||
group_name_1 = "group_name_1"
|
||||
group_name_2 = "group_name_2"
|
||||
|
||||
self.store.get_state_groups.return_value = {
|
||||
group_name_1: old_state_1,
|
||||
group_name_2: old_state_2,
|
||||
}
|
||||
|
||||
context = yield self.state.compute_event_context(event)
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(len(context.current_state), 5)
|
||||
|
||||
|
|
@ -181,21 +447,70 @@ class StateTestCase(unittest.TestCase):
|
|||
|
||||
@defer.inlineCallbacks
|
||||
def test_resolve_state_conflict(self):
|
||||
event = self.create_event(type="test4", state_key="", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="test4", state_key="", name="event")
|
||||
|
||||
old_state_1 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test3", state_key="2"),
|
||||
self.create_event(type="test4", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test3", state_key="2"),
|
||||
create_event(type="test4", state_key=""),
|
||||
]
|
||||
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(len(context.current_state), 5)
|
||||
|
||||
self.assertIsNone(context.state_group)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_standard_depth_conflict(self):
|
||||
event = create_event(type="test4", name="event")
|
||||
|
||||
member_event = create_event(
|
||||
type=EventTypes.Member,
|
||||
state_key="@user_id:example.com",
|
||||
content={
|
||||
"membership": Membership.JOIN,
|
||||
}
|
||||
)
|
||||
|
||||
old_state_1 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=1),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=2),
|
||||
]
|
||||
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(old_state_2[1], context.current_state[("test1", "1")])
|
||||
|
||||
# Reverse the depth to make sure we are actually using the depths
|
||||
# during state resolution.
|
||||
|
||||
old_state_1 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=2),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=1),
|
||||
]
|
||||
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(old_state_1[1], context.current_state[("test1", "1")])
|
||||
|
||||
def _get_context(self, event, old_state_1, old_state_2):
|
||||
group_name_1 = "group_name_1"
|
||||
group_name_2 = "group_name_2"
|
||||
|
||||
|
|
@ -204,33 +519,4 @@ class StateTestCase(unittest.TestCase):
|
|||
group_name_2: old_state_2,
|
||||
}
|
||||
|
||||
context = yield self.state.compute_event_context(event)
|
||||
|
||||
self.assertEqual(len(context.current_state), 5)
|
||||
|
||||
self.assertIsNone(context.state_group)
|
||||
|
||||
def create_event(self, name=None, type=None, state_key=None):
|
||||
self.event_id += 1
|
||||
event_id = str(self.event_id)
|
||||
|
||||
if not name:
|
||||
if state_key is not None:
|
||||
name = "<%s-%s>" % (type, state_key)
|
||||
else:
|
||||
name = "<%s>" % (type, )
|
||||
|
||||
event = Mock(name=name, spec=[])
|
||||
event.type = type
|
||||
|
||||
if state_key is not None:
|
||||
event.state_key = state_key
|
||||
event.event_id = event_id
|
||||
|
||||
event.is_state = lambda: (state_key is not None)
|
||||
event.unsigned = {}
|
||||
|
||||
event.user_id = "@user_id:example.com"
|
||||
event.room_id = "!room_id:example.com"
|
||||
|
||||
return event
|
||||
return self.state.compute_event_context(event)
|
||||
|
|
|
|||
Loading…
Reference in a new issue