如何强制 `.andExpect(jsonPath()` 为 return Long/long 而不是 int 用于 jackson 解析器的 int 数字

How to force `.andExpect(jsonPath()` to return Long/long instead int for int number for jackson parser

我对 RestController 进行了简单测试。我希望 $[1].parent_idreturns Long 作为一个对象而不是整数基元。如果 parent_id 在长数字范围内并且 > 整数范围(例如:2147483650L),它将 return 长。

@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>

另一项测试的结果:

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);
    }
}

更新

  • Spring Framework 4.3.3 和 5.0.0 首先添加-class 支持显式转换 request 内容以用于 MockRestServiceServer.
  • Spring Framework 4.3.15 和 5.0.5 将添加 first-class 对 response 内容的显式转换支持,以便与 [=12] 一起使用=].

原答案

一个选择(我还没有亲自验证)是尝试不同的 JsonProvider。这可以通过 com.jayway.jsonpath.Configuration.setDefaults(Defaults).

设置

如果您确定 Long 始终可以安全地缩小为 int,您可以使用以下内容:

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

唯一的其他选择是编写自定义 Matcher,在执行实际匹配之前将传入的 Integer 转换为 Long

从 Spring 5.2 开始,您可以提供类型作为 jsonPath() 方法的第三个参数:

public static <T> ResultMatcher jsonPath(String expression, Matcher<T> matcher, Class<T> targetType)

所以在这种情况下它将是:

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

来源: Spring Javadoc API