Added Comment Explaining Behavior

Added a comment referencing the MQTT specification for why the server may not immediately respond to an UNSUBACK
adafruit · Nov 8, 2024 · 0356eec · 0356eec
1 parent 920e64f
commit 0356eec
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/adafruit_minimqtt/adafruit_minimqtt.py b/adafruit_minimqtt/adafruit_minimqtt.py
@@ -865,6 +865,8 @@ def unsubscribe(  # noqa: PLR0912, Too many branches
                         self._subscribed_topics.remove(t)
                     return
                 if op != MQTT_PUBLISH:
+                    # [3.10.4] The Server may continue to deliver existing messages buffered for delivery
+                    # to the client prior to sending the UNSUBACK Packet.
                     raise MMQTTException(
                         f"invalid message received as response to UNSUBSCRIBE: {hex(op)}"
                     )