test: synchronise test_integration on browser first-query

bluetoothbot · bluetoothbot · commit 4fb100555db3 · 2026-05-21T19:58:08.000Z
After #1760 shaved the probe random wait on loopback, async_register_service can finish faster than the ServiceBrowser fires its first startup query. The test asserts `len(answers[0]) == 0` (the initial outbound query carries no known PTR) — when the cache already holds the registered service by the time the first query is built, RFC 6762 §7.1 known-answer suppression makes that assertion racy. Wait for `got_query` once before calling `async_register_service` so the first startup query (built against an empty cache) is guaranteed to fire before the registration lands. Then clear the event and proceed.
diff --git a/tests/test_asyncio.py b/tests/test_asyncio.py
@@ -1066,6 +1066,12 @@ def send(out, addr=const._MDNS_ADDR, port=const._MDNS_PORT, v6_flow_scope=()):
             "ash-2.local.",
             addresses=[socket.inet_aton("10.0.1.2")],
         )
+        # Wait for the browser's first startup query to land (with an empty
+        # cache) before registering — otherwise on fast loopback the register
+        # may finish before the first query fires, and answers[0] picks up
+        # the known PTR via RFC 6762 §7.1 known-answer suppression.
+        await asyncio.wait_for(got_query.wait(), 1)
+        got_query.clear()
         task = await aio_zeroconf_registrar.async_register_service(info)
         await task
         loop = asyncio.get_running_loop()
