我想要从我的teleActivity开始,并模拟登录管理器。然而,在任何@test函数中,我们已经遇到了空指针,因为我们调用了onCreate。如果在启动活动之前覆盖它(如下所示),则活动为空。
据我所知,切换底层依赖项的能力是我们使用Dagger2的重要原因,否则它只是一个非常过度设计的单例。如何覆盖、模拟或切换注入到测试dagger模块——这样我就可以创建这个简单的espresso测试。
请注意,如果采用MVP设计模式,也会有一些区别。
TeleActivity
@Inject
TelePresenter mTelePresenter;
@Inject
public LoginStateManager mLoginStateManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ButterKnife.bind(this);
DaggerInjectorTele.get().inject(this);
mTelePresenter.setTeleDependencies(this);
Intent intent = getIntent();
String searchId = null;
if (intent != null) {
searchId = intent.getStringExtra(Constants.SEARCH_ID);
}
mTelePresenter.onCreateEvent(searchId,
Helper.makeAuthorizationHeader(
// CRASH Null pointer
mLoginStateManager.getBaseLoginResponse().getAccessToken()));
}
浓缩咖啡
@LargeTest
@RunWith(AndroidJUnit4.class)
public class TeleTest {
@Rule
public ActivityTestRule<TeleActivity> mActivityTestRule = new ActivityTestRule(
TeleActivity.class) {
@Override
protected void beforeActivityLaunched() {
super.beforeActivityLaunched();
TeleActivity teleActivity = (TeleActivity)getActivity();
//teleActivity NULL!
teleActivity.mLoginStateManager = mock(LoginStateManager.class);
LoginResponse loginResponse = mock(LoginResponse.class);
when(loginResponse.getAccessToken()).thenReturn("1234");
// Nope here still null
when(teleActivity.mLoginStateManager.getBaseLoginResponse()).thenReturn(loginResponse);
}
};
Dagger 注入器
public class DaggerInjectorTele {
private static TelePresenterComponent telePresenterComponent =
DaggerTelePresenterComponent.builder().build();
public static TelePresenterComponent get() {
return telePresenterComponent;
}
}
TelePresenterComponent
@Singleton
@Component(modules = {TelePresenterModule.class,
LoginStateManagerModule.class})
public interface TelePresenterComponent {
void inject(TeleActivity activity);
}
TelePresenterModule
@Module
public class TelePresenterModule {
@Provides
@Singleton
public TelePresenter getTelePresenter() {
return new TelePresenter();
}
}
登录状态管理模块
@Module
public class LoginStateManagerModule {
@Provides
@Singleton
public LoginStateManager getLoginStateManager(){
return new LoginStateManager();
}
}