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