Speed up SS room sorting (#17468)

We do this by bulk fetching the latest stream ordering.

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Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/util/test_stream_change_cache.py b/tests/util/test_stream_change_cache.py

index 5d38718a50..af1199ef8a 100644
--- a/tests/util/test_stream_change_cache.py
+++ b/tests/util/test_stream_change_cache.py
@@ -249,5 +249,5 @@ class StreamChangeCacheTests(unittest.HomeserverTestCase):
         self.assertEqual(cache.get_max_pos_of_last_change("bar@baz.net"), 3)
         self.assertEqual(cache.get_max_pos_of_last_change("user@elsewhere.org"), 4)
 
-        # Unknown entities will return the stream start position.
-        self.assertEqual(cache.get_max_pos_of_last_change("not@here.website"), 1)
+        # Unknown entities will return None
+        self.assertEqual(cache.get_max_pos_of_last_change("not@here.website"), None)