make kestrel a tak server, so that it can send and receive pois as cots data

test/unit/webrtcSignaling.spec.js

@@ -22,9 +22,10 @@ describe('webrtcSignaling', () => {
   let sessionId
   const userId = 'test-user'
 
-  beforeEach(() => {
+  beforeEach(async () => {
     clearSessions()
-    sessionId = createSession(userId, 'Test').id
+    const session = await createSession(userId, 'Test')
+    sessionId = session.id
   })
 
   it('returns error when session not found', async () => {
@@ -68,4 +69,18 @@ describe('webrtcSignaling', () => {
     expect(res?.type).toBe('transport-connected')
     expect(res?.data?.connected).toBe(true)
   })
+
+  it('returns error when transport.connect throws', async () => {
+    const { getTransport } = await import('../../server/utils/mediasoup.js')
+    getTransport.mockReturnValueOnce({
+      id: 'mock-transport',
+      connect: vi.fn().mockRejectedValue(new Error('Connection failed')),
+    })
+    await handleWebSocketMessage(userId, sessionId, 'create-transport', {})
+    const res = await handleWebSocketMessage(userId, sessionId, 'connect-transport', {
+      transportId: 'mock-transport',
+      dtlsParameters: { role: 'client', fingerprints: [] },
+    })
+    expect(res?.error).toBe('Connection failed')
+  })
 })