Question

我有一个方法GET我需要使用rest模板进行测试：

@ApiOperation("Finds all existing Tag")
@ApiResponses({
        @ApiResponse(code = 200, message = "When list of new tag has been found."),
        @ApiResponse(code = 404, message = "When unable to find any tag"),
    })
    @RequestMapping(method = RequestMethod.GET)
    @ResponseStatus(value = HttpStatus.OK)
    public ResponseEntity<List<Tag>> findAllEvents() {
        log.info("Find All Tags");

        return ResponseEntity.ok(TagEventRepository.findAllEvents());
    }

}

我的测试看起来像这样：

@Test
    public void findAllEvents() {

        //GIVEN
ParameterizedTypeReference<List<Tag>> newTag = new ParameterizedTypeReference<List<Tag>>(){};
        TagTestBuilder
            .withFullList()
            .withSaved()
            .buildList();

            //WHEN
            ResponseEntity<List<Tag>> response = restTemplate.exchange(TagResourceConstants.PATH, HttpMethod.GET, null, newTag);

            //THEN
            assertEquals(HttpStatus.OK.value(),response.

            getStatusCodeValue());

    }

我的问题是我无法将参数化类型引用（继续将List作为返回实体）链接到tagTestBuilder，后者创建完整的标记列表并扩展TestBuilder抽象类，该类实现诸如.createFullList，save和builtList

使用上面的版本测试将通过 - 但它不正确，因为它没有构建我需要的对象列表（不使用TestBuilder）。

我当然可以用testBuilder链接列表但是我无法解析restTemplate交换的方法，例如：

List<Tag> newTag = (List<Tag>) TagTestBuilder
            .withFullList()
            .withSaved()
            .buildList();

            //WHEN
            ResponseEntity<List<Tag>> response = restTemplate.exchange(TagResourceConstants.PATH, HttpMethod.GET, null, newTag);

            //THEN
            assertEquals(HttpStatus.OK.value(),response.

            getStatusCodeValue());

    }

我得到以下错误，了解表单不正确，但不知道如何正确编写。

Error:(82, 71) java: no suitable method found for exchange(java.lang.String,org.springframework.http.HttpMethod,<nulltype>,java.util.List<Tag>)
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(java.lang.String,org.springframework.http.HttpMethod,org.springframework.http.HttpEntity<?>,java.lang.Class<T>,java.lang.Object...) is not applicable
      (cannot infer type-variable(s) T
        (argument mismatch; java.util.List<Tag> cannot be converted to java.lang.Class<T>))
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(java.lang.String,org.springframework.http.HttpMethod,org.springframework.http.HttpEntity<?>,java.lang.Class<T>,java.util.Map<java.lang.String,?>) is not applicable
      (cannot infer type-variable(s) T
        (actual and formal argument lists differ in length))
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(java.net.URI,org.springframework.http.HttpMethod,org.springframework.http.HttpEntity<?>,java.lang.Class<T>) is not applicable
      (cannot infer type-variable(s) T
        (argument mismatch; java.lang.String cannot be converted to java.net.URI))
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(java.lang.String,org.springframework.http.HttpMethod,org.springframework.http.HttpEntity<?>,org.springframework.core.ParameterizedTypeReference<T>,java.lang.Object...) is not applicable
      (cannot infer type-variable(s) T
        (argument mismatch; java.util.List<Tag> cannot be converted to org.springframework.core.ParameterizedTypeReference<T>))
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(java.lang.String,org.springframework.http.HttpMethod,org.springframework.http.HttpEntity<?>,org.springframework.core.ParameterizedTypeReference<T>,java.util.Map<java.lang.String,?>) is not applicable
      (cannot infer type-variable(s) T
        (actual and formal argument lists differ in length))
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(java.net.URI,org.springframework.http.HttpMethod,org.springframework.http.HttpEntity<?>,org.springframework.core.ParameterizedTypeReference<T>) is not applicable
      (cannot infer type-variable(s) T
        (argument mismatch; java.lang.String cannot be converted to java.net.URI))
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(org.springframework.http.RequestEntity<?>,java.lang.Class<T>) is not applicable
      (cannot infer type-variable(s) T
        (actual and formal argument lists differ in length))
    method org.springframework.boot.test.web.client.TestRestTemplate.<T>exchange(org.springframework.http.RequestEntity<?>,org.springframework.core.ParameterizedTypeReference<T>) is not applicable
      (cannot infer type-variable(s) T
        (actual and formal argument lists differ in length))

还尝试使用getEntity方法编写此测试，最后这似乎有效，但我必须调试测试以确保：

@Test
    public void findAllEvents() {

        //GIVEN
        List<Tag> newTag = (List<Tag>) TagTestBuilder
            .withFullList()
            .withSaved()
            .buildList();

            //WHEN
            ResponseEntity<Tag[]> response = restTemplate.getForEntity(TagResourceConstants.PATH, Tag[].class, newTag);

            //THEN
            assertEquals(HttpStatus.OK.value(),response.

            getStatusCodeValue());

我认为这个测试的两个版本（带有[]的getEntity并使用参数化类型引用，它们似乎都正常工作。

Answer 1

restTemplate.exchage中的第四个参数是responseType，它只告诉exchange方法应该转换响应的类。它接受Class类型的变量。如果响应是对象列表，它也可以接受ParameterizedTypeReference。

向该参数提供数据（即您的案例中的标记列表）没有意义。

你的第一个代码块是对的。您不需要将Tags列表传递给restTemplate方法

ParameterizedTypeReference<List<Tag>> responseType = new ParameterizedTypeReference<List<Tag>>(){};
ResponseEntity<List<Tag>> response = restTemplate.exchange(TagResourceConstants.PATH, HttpMethod.GET, null, responseType);

Rest模板GET列表和testBuilder方法问题Spring

1 个答案: