Daggerとproduct flavorを使って、RetrofitのCall.Factoryをビルドごとに切り替える

Retrofit 2.0-beta4を使用。

mainに定義

AppComponent.java

@Singleton
@Component(modules = {
    AppModule.class,
    NetworkModule.class
})
public interface AppComponent {

}

AppModule.java

@Module
public class AppModule {

    @Singleton
    @Provides
    public Retrofit.Builder provideRetrofitBuilder(Call.Factory callFactory, Converter.Factory converterFactory) {
        return new Retrofit.Builder()
                .baseUrl(context.getString(R.string.host))
                .callFactory(callFactory)
                .addConverterFactory(converterFactory)
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create());
    }

    @Singleton
    @Provides
    public Converter.Factory provideConverterFactory() {
        return GsonConverterFactory.create();
    }
}

mock

NetworkModule.java

@Module
public class NetworkModule {

    @Singleton
    @Provides
    public Call.Factory provideCallFactory(Context context) {
        return new MockCallFactory(context);
    }
}

※ MockCallFactoryはokhttp3.Call及びokhttp3.Call.Factoryを自前で実装。

staging

NetworkModule.java

@Module
public class NetworkModule {

    @Singleton
    @Provides
    public Call.Factory provideCallFactory() {
        return new OkHttpClient.Builder()
                .addInterceptor(LoggingInterceptor.create())
                .build();
    }
}

production

NetworkModule.java

@Module
public class NetworkModule {

    @Singleton
    @Provides
    public Call.Factory provideCallFactory() {
        return new OkHttpClient.Builder()
                .build();
    }
}

参考

Leveraging product flavors in Android Studio for hermetic testing
隔離された環境でテストを行うために Android Studio でプロダクト フレーバーを活用する