fix: tests

tests/storage/db/repositories/test_truncate_supersede.py

@@ -118,38 +118,3 @@ class TestTruncateAfterSupersede:
     def test_invalid_conversation_id_is_rejected(self, pg_conn):
         repo = ConversationsRepository(pg_conn)
         assert repo.truncate_after("not-a-uuid", keep_up_to=0) == 0
-
-
-class TestJournalParentMissingLatch:
-    """One WARN per stream, not one per flush."""
-
-    def test_latches_after_first_foreign_key_failure(self, caplog):
-        import logging
-
-        from application.streaming.message_journal import BatchedJournalWriter
-
-        writer = BatchedJournalWriter(
-            "99999999-9999-9999-9999-999999999999", batch_size=1,
-        )
-
-        with caplog.at_level(logging.WARNING):
-            for seq in range(25):
-                writer.record(seq, "answer", {"answer": "x"})
-
-        warnings = [
-            r for r in caplog.records
-            if "no conversation_messages row" in r.getMessage()
-        ]
-        assert len(warnings) == 1, (
-            f"expected a single latched warning, got {len(warnings)}"
-        )
-
-    def test_record_returns_false_once_latched(self):
-        from application.streaming.message_journal import BatchedJournalWriter
-
-        writer = BatchedJournalWriter(
-            "88888888-8888-8888-8888-888888888888", batch_size=1,
-        )
-        writer.record(0, "answer", {"answer": "x"})
-
-        assert writer.record(1, "answer", {"answer": "y"}) is False

tests/test_message_journal.py

@@ -648,6 +648,55 @@ class TestBatchedJournalWriter:
             # Buffer cleared so close() is a no-op and memory stays bounded.
             assert writer._buffer == []
 
+    def test_missing_parent_is_latched_after_the_first_failure(self, caplog):
+        """One WARN per stream, not one per flush.
+
+        A parent row deleted mid-stream (retry/edit truncation) never comes
+        back, so every later flush FK-fails identically. Un-latched, a single
+        3.5-minute research stream logged 342 identical WARNs in production
+        and was that day's entire WARN volume.
+        """
+        import logging
+
+        session_cm, readonly_cm, repo_cls_p, topic_cls_p = self._patch_io()
+        with session_cm as mock_session, readonly_cm, repo_cls_p as mock_repo_cls, topic_cls_p as mock_topic_cls:
+            mock_session.return_value.__enter__.return_value = MagicMock()
+            repo = MagicMock(name="repo")
+            repo.bulk_record.side_effect = _integrity_error("23503")
+            mock_repo_cls.return_value = repo
+            mock_topic_cls.return_value = MagicMock()
+
+            writer = BatchedJournalWriter("msg-1", batch_size=1)
+            with caplog.at_level(
+                logging.WARNING, logger="application.streaming.message_journal"
+            ):
+                for seq in range(25):
+                    writer.record(seq, "answer", {"text": "x"})
+
+        warnings = [
+            r for r in caplog.records
+            if "no conversation_messages row" in r.getMessage()
+        ]
+        assert len(warnings) == 1, (
+            f"expected a single latched warning, got {len(warnings)}"
+        )
+        # And it stopped hitting the DB after the first failure.
+        assert repo.bulk_record.call_count == 1
+
+    def test_record_returns_false_once_parent_is_known_missing(self):
+        session_cm, readonly_cm, repo_cls_p, topic_cls_p = self._patch_io()
+        with session_cm as mock_session, readonly_cm, repo_cls_p as mock_repo_cls, topic_cls_p as mock_topic_cls:
+            mock_session.return_value.__enter__.return_value = MagicMock()
+            repo = MagicMock(name="repo")
+            repo.bulk_record.side_effect = _integrity_error("23503")
+            mock_repo_cls.return_value = repo
+            mock_topic_cls.return_value = MagicMock()
+
+            writer = BatchedJournalWriter("msg-1", batch_size=1)
+
+            assert writer.record(0, "answer", {"text": "a"}) is True
+            assert writer.record(1, "answer", {"text": "b"}) is False
+
     def test_bulk_collision_23505_still_falls_back_to_per_row(self):
         """An explicit 23505 (unique/PK collision) keeps the per-row
         fallback — the parent exists, only a ``sequence_no`` collided.