MockWebServer with Retrofit and Dagger

Question

我试图为我的安卓项目实现检测测试。在我的主项目中，我使用了dagger和改造，我从我的模块提供改造。

这是我提供改造的模块：

@Module
public class NetModule {
    @Provides
    @Singleton
    OkHttpClient.Builder provideOkHttpClientBuilder(){
        OkHttpClient.Builder okHttp = new OkHttpClient.Builder();
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        NoCacheInterceptor noCacheInterceptor = new NoCacheInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        if (!okHttp.interceptors().contains(interceptor))
            okHttp.addInterceptor(interceptor);
        if (!okHttp.interceptors().contains(noCacheInterceptor))
            okHttp.addInterceptor(noCacheInterceptor);
        return okHttp;
    }
    @Provides
    Retrofit provideRetrofit(OkHttpClient.Builder httpClient){
        return new Retrofit.Builder()
              .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
              .addConverterFactory(GsonConverterFactory.create())
              .baseUrl(Constant.BASE_URL)
              .client(httpClient.build()).build();
    }
}

然后，在我的androidTest文件夹中，我创建了TestModule来提供MockWebServer的改造，如下所示：

@Module
public class TestNetModule {
    private final MockWebServer mockWebServer;
    public TestNetModule() {
        mockWebServer = new MockWebServer();
    }
    @Provides
    @Singleton
    MockWebServer providerMockWebServer() {
        return new MockWebServer();
    }
    @Provides
    @Singleton
    OkHttpClient.Builder provideOkHttpClientBuilder(){
        OkHttpClient.Builder okHttp = new OkHttpClient.Builder();
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        NoCacheInterceptor noCacheInterceptor = new NoCacheInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        if (!okHttp.interceptors().contains(interceptor))
            okHttp.addInterceptor(interceptor);
        if (!okHttp.interceptors().contains(noCacheInterceptor))
            okHttp.addInterceptor(noCacheInterceptor);
        return okHttp;
    }
    @Provides
    Retrofit.Builder provideRetrofitBuilder(OkHttpClient.Builder httpClient, MockWebServer mockWebServer){
        return new Retrofit.Builder()
              .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
              .addConverterFactory(GsonConverterFactory.create())
              .baseUrl(mockWebServer.url("/").toString())
              .client(httpClient.build()).build();
    }
}

当我运行测试时，我总是在代码.baseUrl(mockWebServer.url("/").toString())时收到错误android.os.NetworkOnMainThreadException。如何正确实施模拟网络服务器与改造和dagger进行测试？

Answer 1

调用mockWebServer.url("/")会启动服务器，这是无法在主线程上完成的操作。

我是这样解决的：

@Provides
@Singleton
MockWebServer providerMockWebServer() {
    MockWebServer mockWebServer = new MockWebServer()
    Thread thread = new Thread() {
        @Override
        public void run() {
            try {
                mockWebServer.start();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    };
    thread.start();
    return mockWebServer;
}