@Test
public void getAllExtensionClass() {

    List<Class> allExtensionClass = EnhancedServiceLoader.getAllExtensionClass(Hello.class);
    assertThat(allExtensionClass.get(2).getSimpleName()).isEqualTo((FrenchHello.class.getSimpleName()));
    assertThat(allExtensionClass.get(1).getSimpleName()).isEqualTo((EnglishHello.class.getSimpleName()));
    assertThat(allExtensionClass.get(0).getSimpleName()).isEqualTo((ChineseHello.class.getSimpleName()));
}