json - 如何强制`.andExpect(jsonPath()`)返回Long/long而不是int以获取 jackson 解析器的int数

Question

我对RestController进行了简单测试。我希望$[1].parent_id返回Long作为一个对象，而不是整数基元。如果parent_id处于长整数范围内并且>整数范围内（例如：2147483650L），它将返回Long。

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = Application.class)
@WebAppConfiguration
@WebAppConfiguration
public class TransactionServiceControllerTest {

@Before
public void setup() throws Exception {
    this.mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
    // I copy this from my RestController class
    this.transactions = Arrays.asList(
            new Transaction(100d, "car", null),
            new Transaction(100d, "table", 12L)
     );
}

@Test
public void readSingleBookmark() throws Exception {
   mockMvc.perform(MockMvcRequestBuilders.get("/transaction/"))
   .andExpect(content().contentType(contentType)) // ok
   .andExpect(jsonPath("$", hasSize(2))) // ok
   //omitted
   andExpect(jsonPath("$[1].parent_id",is(this.transactions.get(1).getParentId())));
} //assertion fail

Expected: is <12L>
but: was <12>

另一个测试的结果：

Expected: is <12L>
but: was <2147483650L> //return Long instead int

这是我的JacksonConfiguration

@Configuration
public class JacksonConfiguration {

    @Bean
    @Primary
    public ObjectMapper objectMapper() {
        final ObjectMapper objectMapper = new ObjectMapper();

        //supposed to be this is the magic trick but it seems not..
        objectMapper.enable(DeserializationFeature.USE_LONG_FOR_INTS);


        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_ABSENT);
        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
        return objectMapper;
    }
}

还有我的POJO

public class Transaction {

private double ammount;

private String type;

private Long parentId;

public Transaction(Double ammount, String type, Long parentId) {
  //omitted
}
//setter and getter omitted
}

MyRestController

@RestController
@RequestMapping("transaction")
public class TransactionServiceController {

@RequestMapping(method = RequestMethod.GET)
List<Transaction> getTransaction() {
    return
            Arrays.asList(
                    new Transaction(100d, "car", null),
                    new Transaction(100d, "table", 12L)
            );
    }
}

和Application.java

@SpringBootApplication
public class Application {
    public static void main(String[] args){
        SpringApplication.run(Application.class,args);
    }
}

Answer 1

更新资料


Spring Framework 4.3.3和5.0.0添加了对对与MockRestServiceServer一起使用的请求内容进行显式转换的一流支持。


有关详细信息，请参见SPR-14498。

Spring Framework 4.3.15和5.0.5将为对与MockMvc一起使用的响应内容的显式转换添加一流的支持。


有关详细信息，请参见SPR-16587。





原始答案

一种选择（我尚未亲自验证）是尝试使用其他JsonProvider。可以通过com.jayway.jsonpath.Configuration.setDefaults(Defaults)设置。

如果确定始终可以安全地将Long缩小为int，则可以使用以下方法：

andExpect(jsonPath("$[1].parent_id",is(this.transactions.get(1).getParentId().intValue())));

唯一的其他选择是编写一个自定义的 Matcher，将其输入的 Integer转换为 Long，然后再执行实际的匹配。