fix(spa): a film playing waits for the session after a reconnect

Stream credit sent before the new handshake was refused, and the node's
"Handshake required" replaced the film.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/packages/meshbay-hub/tests/test_reconnect_race.py b/packages/meshbay-hub/tests/test_reconnect_race.py
index 01c51824..539ae268 100644
--- a/packages/meshbay-hub/tests/test_reconnect_race.py
+++ b/packages/meshbay-hub/tests/test_reconnect_race.py
@@ -75,6 +75,18 @@ def test_the_replaced_channels_close_event_is_ignored(late):
     assert out["outcome"] == "done" and out["written"] == 400
 
 
+@pytest.mark.parametrize("cfg", [{}, {"rttMs": 800}, {"openMs": 2500}])
+def test_a_film_playing_says_nothing_before_the_handshake(cfg):
+    # Reported live on a phone moving from mobile data to Wi-Fi: the player
+    # went on granting stream credit through the reconnect, one grant reached
+    # the new channel before its handshake, and the node's "Handshake required"
+    # replaced the film. A grant or a diagnostic for a stream the lost session
+    # took with it has nowhere to go; the reconnect asks for the stream again.
+    out = _run(stream=True, runUntil=60000, **cfg)
+    assert out["outcome"] == "done" and out["reconnected"] == 1
+    assert out["refusedTypes"] == [], out["refusedTypes"]
+
+
 def _node_opening_types() -> set[str]:
     """What the node answers before the handshake, read from its dispatch."""
     from meshbay_common.protocol import MNP