diff --git a/tests/handlers/test_federation.py b/tests/handlers/test_federation.py
new file mode 100644
index 0000000000..96fea58673
--- /dev/null
+++ b/tests/handlers/test_federation.py
@@ -0,0 +1,274 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 The Matrix.org Foundation C.I.C.
+#
+# 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.
+import logging
+from unittest import TestCase
+
+from synapse.api.constants import EventTypes
+from synapse.api.errors import AuthError, Codes, SynapseError
+from synapse.api.room_versions import RoomVersions
+from synapse.events import EventBase
+from synapse.federation.federation_base import event_from_pdu_json
+from synapse.logging.context import LoggingContext, run_in_background
+from synapse.rest import admin
+from synapse.rest.client.v1 import login, room
+
+from tests import unittest
+
+logger = logging.getLogger(__name__)
+
+
+class FederationTestCase(unittest.HomeserverTestCase):
+ servlets = [
+ admin.register_servlets,
+ login.register_servlets,
+ room.register_servlets,
+ ]
+
+ def make_homeserver(self, reactor, clock):
+ hs = self.setup_test_homeserver(http_client=None)
+ self.handler = hs.get_handlers().federation_handler
+ self.store = hs.get_datastore()
+ return hs
+
+ def test_exchange_revoked_invite(self):
+ user_id = self.register_user("kermit", "test")
+ tok = self.login("kermit", "test")
+
+ room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
+
+ # Send a 3PID invite event with an empty body so it's considered as a revoked one.
+ invite_token = "sometoken"
+ self.helper.send_state(
+ room_id=room_id,
+ event_type=EventTypes.ThirdPartyInvite,
+ state_key=invite_token,
+ body={},
+ tok=tok,
+ )
+
+ d = self.handler.on_exchange_third_party_invite_request(
+ room_id=room_id,
+ event_dict={
+ "type": EventTypes.Member,
+ "room_id": room_id,
+ "sender": user_id,
+ "state_key": "@someone:example.org",
+ "content": {
+ "membership": "invite",
+ "third_party_invite": {
+ "display_name": "alice",
+ "signed": {
+ "mxid": "@alice:localhost",
+ "token": invite_token,
+ "signatures": {
+ "magic.forest": {
+ "ed25519:3": "fQpGIW1Snz+pwLZu6sTy2aHy/DYWWTspTJRPyNp0PKkymfIsNffysMl6ObMMFdIJhk6g6pwlIqZ54rxo8SLmAg"
+ }
+ },
+ },
+ },
+ },
+ },
+ )
+
+ failure = self.get_failure(d, AuthError).value
+
+ self.assertEqual(failure.code, 403, failure)
+ self.assertEqual(failure.errcode, Codes.FORBIDDEN, failure)
+ self.assertEqual(failure.msg, "You are not invited to this room.")
+
+ def test_rejected_message_event_state(self):
+ """
+ Check that we store the state group correctly for rejected non-state events.
+
+ Regression test for #6289.
+ """
+ OTHER_SERVER = "otherserver"
+ OTHER_USER = "@otheruser:" + OTHER_SERVER
+
+ # create the room
+ user_id = self.register_user("kermit", "test")
+ tok = self.login("kermit", "test")
+ room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
+ room_version = self.get_success(self.store.get_room_version(room_id))
+
+ # pretend that another server has joined
+ join_event = self._build_and_send_join_event(OTHER_SERVER, OTHER_USER, room_id)
+
+ # check the state group
+ sg = self.successResultOf(
+ self.store._get_state_group_for_event(join_event.event_id)
+ )
+
+ # build and send an event which will be rejected
+ ev = event_from_pdu_json(
+ {
+ "type": EventTypes.Message,
+ "content": {},
+ "room_id": room_id,
+ "sender": "@yetanotheruser:" + OTHER_SERVER,
+ "depth": join_event["depth"] + 1,
+ "prev_events": [join_event.event_id],
+ "auth_events": [],
+ "origin_server_ts": self.clock.time_msec(),
+ },
+ room_version,
+ )
+
+ with LoggingContext(request="send_rejected"):
+ d = run_in_background(self.handler.on_receive_pdu, OTHER_SERVER, ev)
+ self.get_success(d)
+
+ # that should have been rejected
+ e = self.get_success(self.store.get_event(ev.event_id, allow_rejected=True))
+ self.assertIsNotNone(e.rejected_reason)
+
+ # ... and the state group should be the same as before
+ sg2 = self.successResultOf(self.store._get_state_group_for_event(ev.event_id))
+
+ self.assertEqual(sg, sg2)
+
+ def test_rejected_state_event_state(self):
+ """
+ Check that we store the state group correctly for rejected state events.
+
+ Regression test for #6289.
+ """
+ OTHER_SERVER = "otherserver"
+ OTHER_USER = "@otheruser:" + OTHER_SERVER
+
+ # create the room
+ user_id = self.register_user("kermit", "test")
+ tok = self.login("kermit", "test")
+ room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
+ room_version = self.get_success(self.store.get_room_version(room_id))
+
+ # pretend that another server has joined
+ join_event = self._build_and_send_join_event(OTHER_SERVER, OTHER_USER, room_id)
+
+ # check the state group
+ sg = self.successResultOf(
+ self.store._get_state_group_for_event(join_event.event_id)
+ )
+
+ # build and send an event which will be rejected
+ ev = event_from_pdu_json(
+ {
+ "type": "org.matrix.test",
+ "state_key": "test_key",
+ "content": {},
+ "room_id": room_id,
+ "sender": "@yetanotheruser:" + OTHER_SERVER,
+ "depth": join_event["depth"] + 1,
+ "prev_events": [join_event.event_id],
+ "auth_events": [],
+ "origin_server_ts": self.clock.time_msec(),
+ },
+ room_version,
+ )
+
+ with LoggingContext(request="send_rejected"):
+ d = run_in_background(self.handler.on_receive_pdu, OTHER_SERVER, ev)
+ self.get_success(d)
+
+ # that should have been rejected
+ e = self.get_success(self.store.get_event(ev.event_id, allow_rejected=True))
+ self.assertIsNotNone(e.rejected_reason)
+
+ # ... and the state group should be the same as before
+ sg2 = self.successResultOf(self.store._get_state_group_for_event(ev.event_id))
+
+ self.assertEqual(sg, sg2)
+
+ def _build_and_send_join_event(self, other_server, other_user, room_id):
+ join_event = self.get_success(
+ self.handler.on_make_join_request(other_server, room_id, other_user)
+ )
+ # the auth code requires that a signature exists, but doesn't check that
+ # signature... go figure.
+ join_event.signatures[other_server] = {"x": "y"}
+ with LoggingContext(request="send_join"):
+ d = run_in_background(
+ self.handler.on_send_join_request, other_server, join_event
+ )
+ self.get_success(d)
+
+ # sanity-check: the room should show that the new user is a member
+ r = self.get_success(self.store.get_current_state_ids(room_id))
+ self.assertEqual(r[(EventTypes.Member, other_user)], join_event.event_id)
+
+ return join_event
+
+
+class EventFromPduTestCase(TestCase):
+ def test_valid_json(self):
+ """Valid JSON should be turned into an event."""
+ ev = event_from_pdu_json(
+ {
+ "type": EventTypes.Message,
+ "content": {"bool": True, "null": None, "int": 1, "str": "foobar"},
+ "room_id": "!room:test",
+ "sender": "@user:test",
+ "depth": 1,
+ "prev_events": [],
+ "auth_events": [],
+ "origin_server_ts": 1234,
+ },
+ RoomVersions.V6,
+ )
+
+ self.assertIsInstance(ev, EventBase)
+
+ def test_invalid_numbers(self):
+ """Invalid values for an integer should be rejected, all floats should be rejected."""
+ for value in [
+ -(2 ** 53),
+ 2 ** 53,
+ 1.0,
+ float("inf"),
+ float("-inf"),
+ float("nan"),
+ ]:
+ with self.assertRaises(SynapseError):
+ event_from_pdu_json(
+ {
+ "type": EventTypes.Message,
+ "content": {"foo": value},
+ "room_id": "!room:test",
+ "sender": "@user:test",
+ "depth": 1,
+ "prev_events": [],
+ "auth_events": [],
+ "origin_server_ts": 1234,
+ },
+ RoomVersions.V6,
+ )
+
+ def test_invalid_nested(self):
+ """List and dictionaries are recursively searched."""
+ with self.assertRaises(SynapseError):
+ event_from_pdu_json(
+ {
+ "type": EventTypes.Message,
+ "content": {"foo": [{"bar": 2 ** 56}]},
+ "room_id": "!room:test",
+ "sender": "@user:test",
+ "depth": 1,
+ "prev_events": [],
+ "auth_events": [],
+ "origin_server_ts": 1234,
+ },
+ RoomVersions.V6,
+ )
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