我在尝试测试代表Rest Client的类时遇到问题。我在Spring Boot中使用RestTemplate。
这是抽象的RestClient类:
public abstract class RestClient {
...
public RestResponse sendPostRequest(URI baseUri, String resource, IRestRequest restRequest, ClassresponseClass)
throws ServerException, ClientException {
...
try {
RestTemplate restTemplate = new RestTemplate();
response = restTemplate.exchange(baseUri, HttpMethod.POST, getEntity(restRequest), responseClass);
result = response.getBody();
getLogger().debug("[{}] received", result);
return result;
} catch (HttpClientErrorException e) {
throw new ClientException(e.getCause());
} catch (HttpServerErrorException e) {
throw new ServerException(e.getCause());
} catch (Exception e) {
getLogger().error("Error with cause: {}.", e.getMessage());
}
...
}
}
这是实际的实现:
public class ActualRestClient extends RestClient {
public RestResponse sendFetchFileRequest(URI baseUri, FetchFileRequest request) throws ServerException, ClientException {
return sendPostRequest(baseUri, "FETCH_FILE", request, RestResponse.class);
}
}
这是测试:
@RunWith(PowerMockRunner.class)
@PrepareForTest({ActualRestClient.class, RestClient.class})
public class ActualResRestClientTest {
private static final String REQUEST_URI = "something";
@InjectMocks
public ActualRestClient testee;
@Mock
private RestTemplate restTemplate;
@Test(expected = ServerException.class)
public void sendPostRequestWithResponseBody_throwsServerException() throws Exception {
HttpServerErrorException httpServerErrorException = new HttpServerErrorException(HttpStatus.INTERNAL_SERVER_ERROR);
when(restTemplate.exchange(Mockito.any(URI.class), eq(HttpMethod.POST), Mockito.any(), eq(FetchFileRequest.class))).thenThrow(httpServerErrorException);
testee.sendFetchFileRequest(new URI(REQUEST_URI), new FetchFileRequest());
}
}
ClientException和ServerException是我通过扩展Exception类创建的异常。我的问题是,在RestClient类中,另一个异常被捕获(消息:“URI不是绝对的”)而不是HttpServerErrorException,我无法理解为什么。谢谢!
正如评论者已经表达的那样:做new URI("something")
已经向你投掷了。但即使您传递“有效”URI,您的代码也无法正常工作,因为您的结果存在误解。你看:
RestTemplate restTemplate = new RestTemplate();
response = restTemplate.exchange(baseUri, HttpMethod.POST, getEntity(restRequest), responseClass);
该代码存在于您所测试的类的方法中。但@InjectMocks仅适用于类的字段。
换句话说:当你的生产代码被执行时,会创建一个新的(完全不同的** ResponseTemplate实例。因此你的模拟规范是无关紧要的,因为这个方法首先不会在你的模拟上调用。
两种选择:
new()
的调用。我建议您使用选项一,并避免完全使用PowerMock(ito)扩展!