// Check given set of engines are persisted to config.xml correctly
 private void checkEnginesPersistedCorrectly(final HybridMobileEngine[] engines)
     throws CoreException {
   Widget w = WidgetModel.getModel(testproject.hybridProject()).getWidgetForRead();
   assertEquals(engines.length, w.getEngines().size());
   List<Engine> persistedEngines = w.getEngines();
   for (HybridMobileEngine hybridMobileEngine : engines) {
     boolean enginePersisted = false;
     for (Engine engine : persistedEngines) {
       if (hybridMobileEngine.getId().equals(engine.getName())
           && hybridMobileEngine.getVersion().equals(engine.getVersion())) {
         enginePersisted = true;
         break;
       }
     }
     assertTrue("HybridMobile Engine is not persisted correctly", enginePersisted);
   }
 }