无法使用 PowerMockito 模拟某些最终 类 - java.lang.IllegalAccessError

Question

当我尝试从某个 Google 库中模拟某些最终的 class 时，例如 SearchGoogleAdsRequest 他们给我 IllegalAccessError ，我添加了 @PrepareForTest class.

顶部的注释

@RunWith(PowerMockRunner.class)
@PrepareForTest({SearchGoogleAdsRequest.class})
@PowerMockIgnore({"javax.net.ssl.*"})
public class GoogleAdsReportDownloaderTest {
final SearchGoogleAdsRequest searchGoogleAdsRequest = PowerMockito.mock(SearchGoogleAdsRequest.class);
final GoogleAdsServiceClient mockGoogleAdsServiceClient = mock(GoogleAdsServiceClient.class);
final GoogleAdsServiceClient.SearchPagedResponse searchPagedResponse =
            mock(GoogleAdsServiceClient.SearchPagedResponse.class);

when(mockGoogleAdsServiceClient.searchPagedCallable()).thenReturn(callable);
when(mockGoogleAdsServiceClient.searchPagedCallable().call(searchGoogleAdsRequest)).thenReturn(searchPagedResponse);
when(searchPagedResponse.iterateAll()).thenReturn(Arrays.asList(mockGoogleAdsRow));
when(mockGoogleAdsServiceClient.search(any())).thenReturn(searchPagedResponse);

    

错误

java.lang.IllegalAccessError: Class com/google/ads/googleads/v6/services/SearchGoogleAdsRequest$MockitoMock53664588 illegally accessing "package private" member of class com/google/protobuf/GeneratedMessageV3$UnusedPrivateParameter

SearchGoogleAdsRequest final class 看起来像这样，PowerMockito 无法模拟。

public final class SearchGoogleAdsRequest extends GeneratedMessageV3 implements SearchGoogleAdsRequestOrBuilder {

    private static final SearchGoogleAdsRequest DEFAULT_INSTANCE = new SearchGoogleAdsRequest();
    private static final Parser<SearchGoogleAdsRequest> PARSER = new AbstractParser<SearchGoogleAdsRequest>() {
        public SearchGoogleAdsRequest parsePartialFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException {
            return new SearchGoogleAdsRequest(input, extensionRegistry);
        }
    };

    private SearchGoogleAdsRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
        super(builder);
        this.memoizedIsInitialized = -1;
    }

    private SearchGoogleAdsRequest() {
        this.memoizedIsInitialized = -1;
        this.customerId_ = "";
        this.query_ = "";
        this.pageToken_ = "";
        this.summaryRowSetting_ = 0;
    }

我可以通过配置 MockMaker 来绕过这个。但是 MockMaker 不能与 PowerMockito 一起工作并给出错误（无法初始化插件，并且某些加载程序应该与 Mockito 一起使用但正在与 PowerMockito 一起加载）。

我需要使用 Power Mockito，因为我需要模拟本地范围对象，而其他人创建的其他单元测试与 MockMaker 不兼容。

Answer 1

我使用 newBuilder 创建 class 的对象解决了这个问题并绕过了这个问题。它并没有真正模拟 class，但在我的情况下我可以将其用作我需要模拟的 class 的参数。如果我们不需要 PowerMockito，那么我们可以将 Mockito 与 MockMaker 一起使用，但是这些 classes 可以很容易地被模拟。

final SearchGoogleAdsRequest searchGoogleAdsRequest = SearchGoogleAdsRequest.newBuilder().build();
final GoogleAdsServiceClient mockGoogleAdsServiceClient = mock(GoogleAdsServiceClient.class);
final GoogleAdsServiceClient.SearchPagedResponse searchPagedResponse =
            mock(GoogleAdsServiceClient.SearchPagedResponse.class);


when(mockGoogleAdsServiceClient.searchPagedCallable()).thenReturn(callable);
when(mockGoogleAdsServiceClient.searchPagedCallable().call(searchGoogleAdsRequest)).thenReturn(searchPagedResponse);
when(searchPagedResponse.iterateAll()).thenReturn(Arrays.asList(mockGoogleAdsRow));
when(mockGoogleAdsServiceClient.search(any())).thenReturn(searchPagedResponse);