@Test
public void loadFallbackMappersByAlias() {

    final MessageMapperRegistry registry = underTest.registryOf(DittoMessageMapper.CONTEXT,
            ConnectivityModelFactory.emptyPayloadMappingDefinition());
    final List<MessageMapper> dittoMappers =
            registry.getMappers(ConnectivityModelFactory.newPayloadMapping("Ditto"));
    assertThat(dittoMappers).hasSize(1);
    final MessageMapper dittoMapper = dittoMappers.get(0);
    assertThat(dittoMapper).isInstanceOf(WrappingMessageMapper.class);
    assertThat(dittoMapper.getId()).isEqualTo("Ditto");
    assertThat(((WrappingMessageMapper) dittoMapper).getDelegate()).isInstanceOf(DittoMessageMapper.class);
}