### Question:
AcmeRuntimeAggregator implements IRuntimeAggregator<IAcmeSystem> { @Override public IEventBuffer getEventBuffer() { return eventBuffer; } AcmeRuntimeAggregator(ISystemConfiguration config);  AcmeRuntimeAggregator(ISystemConfiguration config,
            IDatabaseConnector dbConn); @Override void start(); @Override void stop(); @Override IModelInstance<IAcmeSystem> getInternalModel(); @Override IModelInstance<IAcmeSystem> copyInternalModel(); @Override IEventBuffer getEventBuffer(); @Override synchronized void processEvent(String channel, IRainbowMessage event);  }### Answer:
@Test public void testGetEventBuffer() throws RuntimeAggregatorException { System.out.println("getEventBuffer"); AcmeRuntimeAggregator instance = new AcmeRuntimeAggregator(systemConfig, new DummyDatabaseConnector()); IEventBuffer buffer = instance.getEventBuffer(); assertNotNull(buffer); }