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# -*- coding: utf-8 -*-
# Copyright 2014 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer
from twisted.trial import unittest
from synapse.state import StateHandler
from synapse.storage.pdu import PduEntry
from synapse.federation.pdu_codec import encode_event_id
from collections import namedtuple
from mock import Mock
ReturnType = namedtuple(
"StateReturnType", ["new_branch", "current_branch"]
)
class StateTestCase(unittest.TestCase):
def setUp(self):
self.persistence = Mock(spec=[
"get_unresolved_state_tree",
"update_current_state",
"get_latest_pdus_in_context",
"get_current_state_pdu",
"get_pdu",
])
self.replication = Mock(spec=["get_pdu"])
hs = Mock(spec=["get_datastore", "get_replication_layer"])
hs.get_datastore.return_value = self.persistence
hs.get_replication_layer.return_value = self.replication
hs.hostname = "bob.com"
self.state = StateHandler(hs)
@defer.inlineCallbacks
def test_new_state_key(self):
# We've never seen anything for this state before
new_pdu = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu], [])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_direct_overwrite(self):
# We do a direct overwriting of the old state, i.e., the new state
# points to the old state.
old_pdu = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("B", "test", "mem", "x", "A", 5)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu], [old_pdu])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_fail(self):
# We try to update the state based on an outdated state, and have a
# too low power level.
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 5)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertFalse(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(0, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_succeed(self):
# We try to update the state based on an outdated state, but have
# sufficient power level to force the update.
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 15)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_equal_same_len(self):
# We try to update the state based on an outdated state, the power
# levels are the same and so are the branch lengths
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 10)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_equal_diff_len(self):
# We try to update the state based on an outdated state, the power
# levels are the same but the branch length of the new one is longer.
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
old_pdu_3 = new_fake_pdu_entry("C", "test", "mem", "x", "A", 10)
new_pdu = new_fake_pdu_entry("D", "test", "mem", "x", "C", 10)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_3, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_missing_pdu(self):
# We try to update state against a PDU we haven't yet seen,
# triggering a get_pdu request
# The pdu we haven't seen
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 20)
# The return_value of `get_unresolved_state_tree`, which changes after
# the call to get_pdu
tree_to_return = [ReturnType([new_pdu], [old_pdu_2])]
def return_tree(p):
return tree_to_return[0]
def set_return_tree(*args, **kwargs):
tree_to_return[0] = ReturnType(
[new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1]
)
self.persistence.get_unresolved_state_tree.side_effect = return_tree
self.replication.get_pdu.side_effect = set_return_tree
self.persistence.get_pdu.return_value = None
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_with(
new_pdu
)
self.assertEquals(
2, self.persistence.get_unresolved_state_tree.call_count
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
@defer.inlineCallbacks
def test_new_event(self):
event = Mock()
state_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 20)
snapshot = Mock()
snapshot.prev_state_pdu = state_pdu
event_id = "pdu_id@origin.com"
def fill_out_prev_events(event):
event.prev_events = [event_id]
event.depth = 6
snapshot.fill_out_prev_events = fill_out_prev_events
yield self.state.handle_new_event(event, snapshot)
self.assertLess(5, event.depth)
self.assertEquals(1, len(event.prev_events))
prev_id = event.prev_events[0]
self.assertEqual(event_id, prev_id)
self.assertEqual(
encode_event_id(state_pdu.pdu_id, state_pdu.origin),
event.prev_state
)
def new_fake_pdu_entry(pdu_id, context, pdu_type, state_key, prev_state_id,
power_level):
new_pdu = PduEntry(
pdu_id=pdu_id,
pdu_type=pdu_type,
state_key=state_key,
power_level=power_level,
prev_state_id=prev_state_id,
origin="example.com",
context="context",
ts=1405353060021,
depth=0,
content_json="{}",
unrecognized_keys="{}",
outlier=True,
is_state=True,
prev_state_origin="example.com",
have_processed=True,
)
return new_pdu
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