Extend stats summary with call device and user count based on room state

spec/test-utils/webrtc.ts

@@ -745,3 +745,78 @@ export const REMOTE_SFU_DESCRIPTION =
     "a=sctp-port:5000\n" +
     "a=ice-ufrag:obZwzAcRtxwuozPZ\n" +
     "a=ice-pwd:TWXNaPeyKTTvRLyIQhWHfHlZHJjtcoKs";
+
+export const groupCallParticipantsFourOtherDevices = new Map([
+    [
+        new RoomMember("roomId0", "user1"),
+        new Map([
+            [
+                "deviceId0",
+                {
+                    sessionId: "0",
+                    screensharing: false,
+                },
+            ],
+            [
+                "deviceId1",
+                {
+                    sessionId: "1",
+                    screensharing: false,
+                },
+            ],
+            [
+                "deviceId2",
+                {
+                    sessionId: "2",
+                    screensharing: false,
+                },
+            ],
+        ]),
+    ],
+    [
+        new RoomMember("roomId0", "user2"),
+        new Map([
+            [
+                "deviceId3",
+                {
+                    sessionId: "0",
+                    screensharing: false,
+                },
+            ],
+            [
+                "deviceId4",
+                {
+                    sessionId: "1",
+                    screensharing: false,
+                },
+            ],
+        ]),
+    ],
+]);
+
+export const groupCallParticipantsOneOtherDevice = new Map([
+    [
+        new RoomMember("roomId1", "thisMember"),
+        new Map([
+            [
+                "deviceId0",
+                {
+                    sessionId: "0",
+                    screensharing: false,
+                },
+            ],
+        ]),
+    ],
+    [
+        new RoomMember("roomId1", "opponentMember"),
+        new Map([
+            [
+                "deviceId1",
+                {
+                    sessionId: "1",
+                    screensharing: false,
+                },
+            ],
+        ]),
+    ],
+]);

spec/unit/webrtc/stats/groupCallStats.spec.ts

@@ -15,6 +15,7 @@ limitations under the License.
 */
 import { GroupCallStats } from "../../../../src/webrtc/stats/groupCallStats";
 import { CallStatsReportSummary } from "../../../../src/webrtc/stats/callStatsReportSummary";
+import { groupCallParticipantsOneOtherDevice } from "../../../test-utils/webrtc";
 
 const GROUP_CALL_ID = "GROUP_ID";
 const LOCAL_USER_ID = "LOCAL_USER_ID";
@@ -160,6 +161,13 @@ describe("GroupCallStats", () => {
             expect(clearInterval).not.toHaveBeenCalled();
         });
     });
+
+    describe("on setting participants", () => {
+        it("should return the same participants", async () => {
+            stats.setParticipants(groupCallParticipantsOneOtherDevice);
+            expect(stats.getParticipants()).toBe(groupCallParticipantsOneOtherDevice);
+        });
+    });
 });
 
 const mockRTCPeerConnection = (): RTCPeerConnection => {