pool.get(Locale.CHINESE);
poolControl.setReturnValue(null);
MockControl factoryControl = newControl(EngineFactory.class);
EngineFactory factory = (EngineFactory) factoryControl.getMock();
factory.constructNewEngineInstance(Locale.CHINESE);
factoryControl.setReturnValue(engine);
replayControls();
EngineManagerImpl m = new EngineManagerImpl();