如何使用 mockito 抛出 HttpClientErrorException.Unauthorized 错误

Question

我正在使用 mockito 来模拟我的 authenticationService.getUserInfo 方法。

我在尝试模拟 HttpClientErrorException.Unauthorized 时遇到困难。

我不能只新HttpClientErrorException.Unauthorized。

还有其他方法吗？

实施：

try {
    result = authenticationService.getUserInfo(accessToken);

} catch (HttpClientErrorException.Unauthorized e) {

    String errorMsg = "Invalid access token - " + e.getMessage();

    throw new InvalidAccessTokenException(errorMsg);
}

测试用例：

@Test
public void givenInvalidToken_whenGetUserInfoThrows401Response_thenThrowInvalidAccessTokenExceptionAndFail() throws ServletException, IOException {

    HttpClientErrorException ex = new HttpClientErrorException(HttpStatus.UNAUTHORIZED);

    exceptionRule.expect(InvalidAccessTokenException.class);
    exceptionRule.expectMessage("Invalid access token - " + ex.getMessage());

    Mockito.when(authenticationService.getUserInfo(anyString())).thenThrow(ex);

    filter.doFilterInternal(this.request, this.response, this.mockChain);
}

运行测试用例的错误日志：

java.lang.AssertionError: 
Expected: (an instance of com.demo.security.common.exception.InvalidAccessTokenException and exception with message a string containing "Invalid access token - 401 UNAUTHORIZED")
     but: an instance of com.demo.security.common.exception.InvalidAccessTokenException <org.springframework.web.client.HttpClientErrorException: 401 UNAUTHORIZED> is a org.springframework.web.client.HttpClientErrorException
Stacktrace was: org.springframework.web.client.HttpClientErrorException: 401 UNAUTHORIZED

Answer 1

HttpClientErrorException.Unauthorized 是HttpStatusCodeException 的子异常

public static final class HttpClientErrorException.Unauthorized
extends HttpClientErrorException

所以当你抛出 HttpStatusCodeException 时，catch 块将不会执行，因为子异常不会捕获父异常。

所以创建HttpClientErrorException.Unauthorized 并扔掉它

HttpClientErrorException http = HttpClientErrorException.Unauthorized.create(HttpStatus.UNAUTHORIZED, null, null, null, null);

我还建议捕获HttpStatusCodeException，因为UNAUTHORIZED 特定于401，任何400 系列异常都不会被UNAUTHORIZED 捕获。您还可以从HttpClientErrorException 获取状态码并按照我的回答进行验证

try {

result = authenticationService.getUserInfo(accessToken);

} catch (HttpClientErrorException e) {

if(e.getStatusCode().equals(HttpStatus.UNAUTHORIZED))
  //do something

String errorMsg = "Invalid access token - " + e.getMessage();

throw new InvalidAccessTokenException(errorMsg);
}