import com.artemis.Manager; //导入依赖的package包/类
@Test
public void Registration_AllTypesWithNoListeners_NoExceptions() {
    config.setSystem(new BaseSystem() {
        @Override
        protected void processSystem() {
        }
    });
    config.setSystem(new Manager() {
    });
    final World w = new World(config);
    w.getSystem(EventSystem.class).registerEvents(new Object() {});
    w.getSystem(EventSystem.class).dispatch(new SimpleEvent());
    // no exception? happy!
}
 

import com.artemis.Manager; //导入依赖的package包/类
protected World createWorld(Manager manager) {
	return new World(new WorldConfigurationBuilder()
			.with(manager)
			.with(new ExtendedComponentMapperPlugin())
			.build());
}