[Camera] Fix TC_WEBRTC_1_6 failure on not finding any WebRTC session to close (#43565) (#43578)

* Fix TC_WEBRTC_1_6.py failure by ignoring NOT_FOUND status response on invoking EndSession

The test case was failing as EndSession is called at step 9.
Since on closing the browser popup, the peer connection gets closed.
Some implementations can remove the session in CurrentSessions attribute on
peer connection state switching to Closed/Disconnected. Hence it update TC_WEBRTC_1_6.py
to ignore any NOT_FOUND status response for EndSession command.




* Address review comment: Silence only NotFound interaction response




---------

Signed-off-by: s-gatti <s.gatti@samsung.com>
Signed-off-by: Charles Kim <chulspro.kim@samsung.com>
Co-authored-by: chulspro <chulspro.kim@samsung.com>
Co-authored-by: s-gatti <s.gatti@samsung.com>

Author: 3 people

src/python_testing/TC_WEBRTC_1_6.py

@@ -23,7 +23,10 @@
 from matter.ChipDeviceCtrl import TransportPayloadCapability
 from matter.clusters import CameraAvStreamManagement, Objects, WebRTCTransportProvider
 from matter.clusters.Types import NullValue
-from matter.testing.matter_testing import MatterBaseTest, TestStep, default_matter_test_main, has_feature, run_if_endpoint_matches
+from matter.interaction_model import InteractionModelError, Status
+from matter.testing.decorators import has_feature, run_if_endpoint_matches
+from matter.testing.matter_testing import MatterBaseTest
+from matter.testing.runner import TestStep, default_matter_test_main
 from matter.webrtc import BrowserPeerConnection, WebRTCManager
 
 
@@ -213,13 +216,20 @@ async def _run_test_steps(self, webrtc_manager: WebRTCManager, webrtc_peer: Brow
             self.user_verify_two_way_talk("Verify if two way talk back is working")
 
         self.step(9)
-        await self.send_single_cmd(
-            cmd=WebRTCTransportProvider.Commands.EndSession(
-                webRTCSessionID=session_id, reason=Objects.Globals.Enums.WebRTCEndReasonEnum.kUserHangup
-            ),
-            endpoint=endpoint,
-            payloadCapability=TransportPayloadCapability.LARGE_PAYLOAD,
-        )
+        try:
+            await self.send_single_cmd(
+                cmd=WebRTCTransportProvider.Commands.EndSession(
+                    webRTCSessionID=session_id, reason=Objects.Globals.Enums.WebRTCEndReasonEnum.kUserHangup
+                ),
+                endpoint=endpoint,
+                payloadCapability=TransportPayloadCapability.LARGE_PAYLOAD,
+            )
+        except InteractionModelError as e:
+            # Since on closing the browser popup, the PC state changes to Disconnected/Closed.
+            # Some implementations can remove session from CurrentSessions on connection state
+            # switching to Disconnected/Closed. Hence ignore NotFound status response.
+            if (e.status != Status.NotFound):
+                raise
 
         if dut_has_vdo_feature:
             self.step(10)