@Test
public void testInjectExtension() {

    // test default
    InjectExt injectExt = getExtensionLoader(InjectExt.class).getExtension("injection");
    InjectExtImpl injectExtImpl = (InjectExtImpl) injectExt;
    Assertions.assertNotNull(injectExtImpl.getSimpleExt());
    Assertions.assertNull(injectExtImpl.getSimpleExt1());
    Assertions.assertNull(injectExtImpl.getGenericType());
}