fixup tests / comments

src/utils/test.ts

@@ -136,6 +136,10 @@ export class EmittableMockLivekitRoom extends EventEmitter {
     this.remoteParticipants.delete(remoteParticipant.identity);
     this.emit(RoomEvent.ParticipantDisconnected, remoteParticipant);
   }
+
+  public getAsLivekitRoom(): LivekitRoom {
+    return this as unknown as LivekitRoom;
+  }
 }
 
 export function mockLivekitRoom(

src/utils/testReactions.tsx

@@ -204,7 +204,11 @@ export class MockRoom extends EventEmitter {
     return evt.getId()!;
   }
 
-  public getMember() {
-    return undefined;
+  public getMember(): void {
+    return;
+  }
+
+  public testGetAsMatrixRoom(): Room {
+    return this as unknown as Room;
   }
 }