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-rw-r--r--tests/federation/test_federation_sender.py43
-rw-r--r--tests/storage/test_devices.py6
2 files changed, 45 insertions, 4 deletions
diff --git a/tests/federation/test_federation_sender.py b/tests/federation/test_federation_sender.py
index 63ea4f9ee4..91f982518e 100644
--- a/tests/federation/test_federation_sender.py
+++ b/tests/federation/test_federation_sender.py
@@ -162,7 +162,9 @@ class FederationSenderDevicesTestCases(HomeserverTestCase):
 
     def make_homeserver(self, reactor, clock):
         return self.setup_test_homeserver(
-            federation_transport_client=Mock(spec=["send_transaction"]),
+            federation_transport_client=Mock(
+                spec=["send_transaction", "query_user_devices"]
+            ),
         )
 
     def default_config(self):
@@ -218,6 +220,45 @@ class FederationSenderDevicesTestCases(HomeserverTestCase):
         self.assertEqual(len(self.edus), 1)
         self.check_device_update_edu(self.edus.pop(0), u1, "D2", stream_id)
 
+    def test_dont_send_device_updates_for_remote_users(self):
+        """Check that we don't send device updates for remote users"""
+
+        # Send the server a device list EDU for the other user, this will cause
+        # it to try and resync the device lists.
+        self.hs.get_federation_transport_client().query_user_devices.return_value = (
+            defer.succeed(
+                {
+                    "stream_id": "1",
+                    "user_id": "@user2:host2",
+                    "devices": [{"device_id": "D1"}],
+                }
+            )
+        )
+
+        self.get_success(
+            self.hs.get_device_handler().device_list_updater.incoming_device_list_update(
+                "host2",
+                {
+                    "user_id": "@user2:host2",
+                    "device_id": "D1",
+                    "stream_id": "1",
+                    "prev_ids": [],
+                },
+            )
+        )
+
+        self.reactor.advance(1)
+
+        # We shouldn't see an EDU for that update
+        self.assertEqual(self.edus, [])
+
+        # Check that we did successfully process the inbound EDU (otherwise this
+        # test would pass if we failed to process the EDU)
+        devices = self.get_success(
+            self.hs.get_datastores().main.get_cached_devices_for_user("@user2:host2")
+        )
+        self.assertIn("D1", devices)
+
     def test_upload_signatures(self):
         """Uploading signatures on some devices should produce updates for that user"""
 
diff --git a/tests/storage/test_devices.py b/tests/storage/test_devices.py
index 5491fbf6da..ccc3893869 100644
--- a/tests/storage/test_devices.py
+++ b/tests/storage/test_devices.py
@@ -118,7 +118,7 @@ class DeviceStoreTestCase(HomeserverTestCase):
         device_ids = ["device_id1", "device_id2"]
 
         # Add two device updates with sequential `stream_id`s
-        self.add_device_change("user_id", device_ids, "somehost")
+        self.add_device_change("@user_id:test", device_ids, "somehost")
 
         # Get all device updates ever meant for this remote
         now_stream_id, device_updates = self.get_success(
@@ -142,7 +142,7 @@ class DeviceStoreTestCase(HomeserverTestCase):
             "device_id4",
             "device_id5",
         ]
-        self.add_device_change("user_id", device_ids, "somehost")
+        self.add_device_change("@user_id:test", device_ids, "somehost")
 
         # Get device updates meant for this remote
         next_stream_id, device_updates = self.get_success(
@@ -162,7 +162,7 @@ class DeviceStoreTestCase(HomeserverTestCase):
 
         # Add some more device updates to ensure it still resumes properly
         device_ids = ["device_id6", "device_id7"]
-        self.add_device_change("user_id", device_ids, "somehost")
+        self.add_device_change("@user_id:test", device_ids, "somehost")
 
         # Get the next batch of device updates
         next_stream_id, device_updates = self.get_success(