code: @Test public void defaultObjectMapperBuilder() throws Exception {
    this.context.register(JacksonAutoConfiguration.class);
    this.context.refresh();
    Jackson2ObjectMapperBuilder builder=this.context.getBean(Jackson2ObjectMapperBuilder.class);
    ObjectMapper mapper=builder.build();
    assertTrue(MapperFeature.DEFAULT_VIEW_INCLUSION.enabledByDefault());
    assertFalse(mapper.getDeserializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
    assertTrue(MapperFeature.DEFAULT_VIEW_INCLUSION.enabledByDefault());
    assertFalse(mapper.getDeserializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
    assertFalse(mapper.getSerializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
    assertTrue(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES.enabledByDefault());
    assertFalse(mapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
  }
  