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-rw-r--r--tests/rest/client/test_third_party_rules.py62
-rw-r--r--tests/rest/client/v2_alpha/test_relations.py62
-rw-r--r--tests/unittest.py10
3 files changed, 134 insertions, 0 deletions
diff --git a/tests/rest/client/test_third_party_rules.py b/tests/rest/client/test_third_party_rules.py
index 227fffab58..bf39014277 100644
--- a/tests/rest/client/test_third_party_rules.py
+++ b/tests/rest/client/test_third_party_rules.py
@@ -161,6 +161,68 @@ class ThirdPartyRulesTestCase(unittest.HomeserverTestCase):
         ev = channel.json_body
         self.assertEqual(ev["content"]["x"], "y")
 
+    def test_message_edit(self):
+        """Ensure that the module doesn't cause issues with edited messages."""
+        # first patch the event checker so that it will modify the event
+        async def check(ev: EventBase, state):
+            d = ev.get_dict()
+            d["content"] = {
+                "msgtype": "m.text",
+                "body": d["content"]["body"].upper(),
+            }
+            return d
+
+        current_rules_module().check_event_allowed = check
+
+        # Send an event, then edit it.
+        channel = self.make_request(
+            "PUT",
+            "/_matrix/client/r0/rooms/%s/send/modifyme/1" % self.room_id,
+            {
+                "msgtype": "m.text",
+                "body": "Original body",
+            },
+            access_token=self.tok,
+        )
+        self.assertEqual(channel.result["code"], b"200", channel.result)
+        orig_event_id = channel.json_body["event_id"]
+
+        channel = self.make_request(
+            "PUT",
+            "/_matrix/client/r0/rooms/%s/send/m.room.message/2" % self.room_id,
+            {
+                "m.new_content": {"msgtype": "m.text", "body": "Edited body"},
+                "m.relates_to": {
+                    "rel_type": "m.replace",
+                    "event_id": orig_event_id,
+                },
+                "msgtype": "m.text",
+                "body": "Edited body",
+            },
+            access_token=self.tok,
+        )
+        self.assertEqual(channel.result["code"], b"200", channel.result)
+        edited_event_id = channel.json_body["event_id"]
+
+        # ... and check that they both got modified
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/r0/rooms/%s/event/%s" % (self.room_id, orig_event_id),
+            access_token=self.tok,
+        )
+        self.assertEqual(channel.result["code"], b"200", channel.result)
+        ev = channel.json_body
+        self.assertEqual(ev["content"]["body"], "ORIGINAL BODY")
+
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/r0/rooms/%s/event/%s" % (self.room_id, edited_event_id),
+            access_token=self.tok,
+        )
+        self.assertEqual(channel.result["code"], b"200", channel.result)
+        ev = channel.json_body
+        self.assertEqual(ev["content"]["body"], "EDITED BODY")
+
     def test_send_event(self):
         """Tests that the module can send an event into a room via the module api"""
         content = {
diff --git a/tests/rest/client/v2_alpha/test_relations.py b/tests/rest/client/v2_alpha/test_relations.py
index 7c457754f1..e7bb5583fc 100644
--- a/tests/rest/client/v2_alpha/test_relations.py
+++ b/tests/rest/client/v2_alpha/test_relations.py
@@ -39,6 +39,11 @@ class RelationsTestCase(unittest.HomeserverTestCase):
         # We need to enable msc1849 support for aggregations
         config = self.default_config()
         config["experimental_msc1849_support_enabled"] = True
+
+        # We enable frozen dicts as relations/edits change event contents, so we
+        # want to test that we don't modify the events in the caches.
+        config["use_frozen_dicts"] = True
+
         return self.setup_test_homeserver(config=config)
 
     def prepare(self, reactor, clock, hs):
@@ -518,6 +523,63 @@ class RelationsTestCase(unittest.HomeserverTestCase):
             {"event_id": edit_event_id, "sender": self.user_id}, m_replace_dict
         )
 
+    def test_edit_reply(self):
+        """Test that editing a reply works."""
+
+        # Create a reply to edit.
+        channel = self._send_relation(
+            RelationTypes.REFERENCE,
+            "m.room.message",
+            content={"msgtype": "m.text", "body": "A reply!"},
+        )
+        self.assertEquals(200, channel.code, channel.json_body)
+        reply = channel.json_body["event_id"]
+
+        new_body = {"msgtype": "m.text", "body": "I've been edited!"}
+        channel = self._send_relation(
+            RelationTypes.REPLACE,
+            "m.room.message",
+            content={"msgtype": "m.text", "body": "foo", "m.new_content": new_body},
+            parent_id=reply,
+        )
+        self.assertEquals(200, channel.code, channel.json_body)
+
+        edit_event_id = channel.json_body["event_id"]
+
+        channel = self.make_request(
+            "GET",
+            "/rooms/%s/event/%s" % (self.room, reply),
+            access_token=self.user_token,
+        )
+        self.assertEquals(200, channel.code, channel.json_body)
+
+        # We expect to see the new body in the dict, as well as the reference
+        # metadata sill intact.
+        self.assertDictContainsSubset(new_body, channel.json_body["content"])
+        self.assertDictContainsSubset(
+            {
+                "m.relates_to": {
+                    "event_id": self.parent_id,
+                    "key": None,
+                    "rel_type": "m.reference",
+                }
+            },
+            channel.json_body["content"],
+        )
+
+        # We expect that the edit relation appears in the unsigned relations
+        # section.
+        relations_dict = channel.json_body["unsigned"].get("m.relations")
+        self.assertIn(RelationTypes.REPLACE, relations_dict)
+
+        m_replace_dict = relations_dict[RelationTypes.REPLACE]
+        for key in ["event_id", "sender", "origin_server_ts"]:
+            self.assertIn(key, m_replace_dict)
+
+        self.assert_dict(
+            {"event_id": edit_event_id, "sender": self.user_id}, m_replace_dict
+        )
+
     def test_relations_redaction_redacts_edits(self):
         """Test that edits of an event are redacted when the original event
         is redacted.
diff --git a/tests/unittest.py b/tests/unittest.py
index 224f037ce1..58a4daa1ec 100644
--- a/tests/unittest.py
+++ b/tests/unittest.py
@@ -32,6 +32,7 @@ from twisted.python.threadpool import ThreadPool
 from twisted.trial import unittest
 from twisted.web.resource import Resource
 
+from synapse import events
 from synapse.api.constants import EventTypes, Membership
 from synapse.config.homeserver import HomeServerConfig
 from synapse.config.ratelimiting import FederationRateLimitConfig
@@ -229,6 +230,11 @@ class HomeserverTestCase(TestCase):
         self._hs_args = {"clock": self.clock, "reactor": self.reactor}
         self.hs = self.make_homeserver(self.reactor, self.clock)
 
+        # Honour the `use_frozen_dicts` config option. We have to do this
+        # manually because this is taken care of in the app `start` code, which
+        # we don't run. Plus we want to reset it on tearDown.
+        events.USE_FROZEN_DICTS = self.hs.config.use_frozen_dicts
+
         if self.hs is None:
             raise Exception("No homeserver returned from make_homeserver.")
 
@@ -292,6 +298,10 @@ class HomeserverTestCase(TestCase):
         if hasattr(self, "prepare"):
             self.prepare(self.reactor, self.clock, self.hs)
 
+    def tearDown(self):
+        # Reset to not use frozen dicts.
+        events.USE_FROZEN_DICTS = False
+
     def wait_on_thread(self, deferred, timeout=10):
         """
         Wait until a Deferred is done, where it's waiting on a real thread.