test: update integration test

integration/websockets/e2e/error-gateway.spec.ts

@@ -11,20 +11,27 @@ describe('ErrorGateway', () => {
     const testingModule = await Test.createTestingModule({
       providers: [ErrorGateway],
     }).compile();
-    app = await testingModule.createNestApplication();
+
+    app = testingModule.createNestApplication();
     await app.listen(3000);
   });
 
   it(`should handle error`, async () => {
     const ws = io('http://localhost:8080');
-    ws.emit('push', {
-      test: 'test',
-    });
+    const pattern = 'push';
+    const data = { test: 'test' };
+
+    ws.emit(pattern, data);
+
     await new Promise<void>(resolve =>
       ws.on('exception', data => {
         expect(data).to.be.eql({
           status: 'error',
           message: 'test',
+          cause: {
+            pattern,
+            data,
+          },
         });
         resolve();
       }),