jUnit:找不到接口com.querydsl.core.types.Predicate的主要或默认构造函数

问题描述

我在spring-application中有一个restcontroller，它返回对象列表...

I have a restcontroller inside a spring-application returning a list of objects...

@GetMapping
@Override
public ResponseEntity readAll(@QuerydslPredicate(root = Entity.class) Predicate predicate, Pageable pageable){
    ...
}

如果我运行它，则一切正常.我可以按分页和谓词过滤请求.但是，如果我运行junit测试，它将失败...

If I run it, everything works fine. I can filter the request by pageable and predicate. But if I run the junit test, it fails...

@Test
public void readAllTest(){
MockMvcBuilders.standaloneSetup(*myController*)
            .build().perform(MockMvcRequestBuilders.get(*myUri*)
                    .accept(MediaType.APPLICATION_JSON_UTF8_VALUE)
            )
            .andExpect(status().isOk())
            .andExpect(content().contentType(MediaType.APPLICATION_JSON_UTF8_VALUE));
}

获取以下错误消息... org.springframework.web.util.NestedServletException:请求处理失败；嵌套异常为java.lang.IllegalStateException:找不到接口com.querydsl.core.types.Predicate

Getting the following Errormessage...org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalStateException: No primary or default constructor found for interface com.querydsl.core.types.Predicate

有人知道如何使用Pageable和Predicate测试Restcontroller吗?

Does anybody know how to test a restcontroller with a Pageable and Predicate?

推荐答案

1. 尝试在测试类注释上添加 @Import(QuerydslWebConfiguration.class) .它将 com.querydsl.core.types.Predicate 的控制器参数解析器添加到Spring上下文中.

1. Try to add on your test class annotation @Import(QuerydslWebConfiguration.class). It adds controller argument resolver for com.querydsl.core.types.Predicate into spring context.

但是在遇到类似以下的异常之后:

But after you'll face with an exception like:

找不到接口org.springframework.data.domain.Pageable的主要或默认构造函数.

No primary or default constructor found for interface org.springframework.data.domain.Pageable.

有注释，为这两个接口加载参数解析器. org.springframework.data.web.config.EnableSpringDataWebSupport

There is annotation, loads argument resolvers for both these interfaces. org.springframework.data.web.config.EnableSpringDataWebSupport

已针对您的测试课程进行了调整:

Addapted for your test class:

@RunWith(SpringRunner.class)
@WebMvcTest(*myController*.class)
@EnableSpringDataWebSupport
public class ControllerTest{

  @Test
  public void readAllTest(){
    MockMvcBuilders.standaloneSetup(*myController*)
            .build().perform(MockMvcRequestBuilders.get(*myUri*)
                    .accept(MediaType.APPLICATION_JSON_UTF8_VALUE)
            )
            .andExpect(status().isOk())
            .andExpect(content().contentType(MediaType.APPLICATION_JSON_UTF8_VALUE));
  }
}

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