### Question:
NetworkHelper { public Observable<WanLoginEntityRes.DataBean> login(String userName, String password) { return mWanApiService.login(userName, password) .map(new WanHttpResultFunc<WanLoginEntityRes.DataBean>()) .compose(RxSchedulers.<WanLoginEntityRes.DataBean>io_main()); } NetworkHelper(WanApiService apiService); Observable<WanLoginEntityRes.DataBean> login(String userName, String password); Observable<TotalResEntity.Register> register(String username, String password, String repassword); Observable<TotalResEntity.HomeArticles> getHomeArticles(int page); Observable<List<TotalResEntity.HomeBanner>> getHomeBanner(); Observable<TotalResEntity.SearchHotWords> getSearchHotWords(); Observable<TotalResEntity.CommonWebsite> getCommonWebsite(); Observable<TotalResEntity.SystemData> getSystemData(); Observable<TotalResEntity.Collect> getCollect(int page);  }### Answer:
@Test public void login() { mApiService.login(username, password).subscribe(dataBeanWanBaseResponseEntity -> { }, throwable -> { }); }