httpserver_test: Add ExpectLog to fix CI

The github security advisory feature lets you make private PRs but
it apparently doesn't support CI so this log failure wasn't caught
until after the PR was merged.

diff --git a/tornado/test/httpserver_test.py b/tornado/test/httpserver_test.py
index db91d62daae03d4bb3419b8c34b443ccdc414fb4..1faf63fabfa53019058f1460a87865dcdad589fd 100644 (file)
--- a/tornado/test/httpserver_test.py
+++ b/tornado/test/httpserver_test.py
@@ -575,9 +575,10 @@ Transfer-Encoding: chunked
                 b"\n", b"\r\n"
             )
         )
-        start_line, headers, response = self.io_loop.run_sync(
-            lambda: read_stream_body(self.stream)
-        )
+        with ExpectLog(gen_log, ".*invalid chunk size", level=logging.INFO):
+            start_line, headers, response = self.io_loop.run_sync(
+                lambda: read_stream_body(self.stream)
+            )
         self.assertEqual(400, start_line.code)
 
     @gen_test