Question

我有一个yml文件，用于存储变量。我正在使用@Value批注在程序中访问这些变量。问题出在我为此类方法编写模拟测试用例时，我的测试方法中出现了空指针异常。我不确定我要去哪里。我现在正在使用@TestPropertySource。我需要正确的方法。

这是到目前为止我尝试过的。我的yml文件看起来像这样，其中包含许多属性：

car:
services:
  clientId: abcde
  authTokenUrl: ....
  .....

public Class CarExecution(){
@Value("${car.services.clientId}")
private String clientId;

@Value("${car.services.authTokenUrl}")
private String authTokenUrl;
public String getAccessToken() {
HttpHeaders headers = new HttpHeaders();
headers.set(CONTENT_TYPE, "application/x-www-form-urlencoded");
headers.set(ACCEPT, APPLICATION_JSON);
HttpEntity<String> entity = new HttpEntity<>("grant_type=password" + "&client_id=" + clientId ,headers);
ResponseEntity<Access> response = restTemplate.exchange(authTokenUrl, HttpMethod.POST, entity,A.class);
return response.getBody().token_type + " " +
    response.getBody().access_token;

}
}

@RunWith(MockitoJUnitRunner.class)
@TestPropertySource(properties = {
     "car.services.clientId = clientId ","car.services.authTokenUrl = authTokenUrl",
})
public class CarTest {
    @Value("${car.services.clientId}")
    private String clientId;
    @Value("${car.services.authTokenUrl}")
    private String authTokenUrl;
    mockServer = MockRestServiceServer.createServer(restTemplate);
    HttpHeaders headers = new HttpHeaders();
    headers.set(CONTENT_TYPE, "application/x-www-form-urlencoded");
    headers.set(ACCEPT, APPLICATION_JSON);
    HttpEntity<String> entity = new HttpEntity<>(
            "grant_type=password&client_id=null", headers);
    authTokenUrl = "";
    new ResponseEntity<>("", HttpStatus.OK);
    A access = new A();
    access.access_token = "token";
    access.token_type = "type";
    response = new ResponseEntity<>(access, HttpStatus.OK);
    Mockito.when(restTemplate.exchange(authTokenUrl, HttpMethod.POST, entity, A.class))
            .thenReturn(response);

Answer 1

问题可能出在您的Runner类上，因为MockitoJUnitRunner没有初始化任何bean或@Value注释。

弹簧的回答是SpringJUnit4ClassRunner，它确实这些位为你（文档here）。

尝试将@RunWith(MockitoJUnitRunner.class)替换为@RunWith(SpringJUnit4ClassRunner.class)。

@Value属性在Mockito测试用例中的用法

1 个答案: