我使用Robolectric进行单元测试,我的项目中有Google Play服务.直到昨天,当Google Play服务更新为新版本时,此工作正常.我收到此错误:
java.lang.NullPointerException at com.google.android.gms.common.GooglePlayServicesUtil.zzh(Unknown Source) at com.google.android.gms.common.GooglePlayServicesUtil.zzd(Unknown Source) at com.google.android.gms.common.GoogleApiAvailability.isGooglePlayServicesAvailable(Unknown Source) at com.google.android.gms.common.api.zzg$zze.zznn(Unknown Source) at com.google.android.gms.common.api.zzg$zzi.run(Unknown Source) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Process finished with exit code 255
似乎没有调用Shadow类,调用GooglePlayServicesUtil给出NullPointerException.有没有人见过这个?
我甚至不在测试中使用Google Play服务.
解决方法
我添加了下一个解决方法,它工作正常:
>将所有PlayServices的相关代码解压缩到Utility类(在我的例子中,它只是可用性检查):
public class PlayServicesUtils { private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000; public static final int AVAILABLE = 1; public static final int ERROR_RESOLVABLE = 2; public static final int ERROR_UNRESOLVABLE = 3; @IntDef({AVAILABLE,ERROR_RESOLVABLE,ERROR_UNRESOLVABLE}) @Retention(RetentionPolicy.SOURCE) public @interface PlayServicesAvailability { } @PlayServicesAvailability public static int checkPlayServices(@NonNull Activity activity) { GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance(); int resultCode = apiAvailability.isGooglePlayServicesAvailable(activity); if (resultCode != ConnectionResult.SUCCESS) { if (apiAvailability.isUserResolvableError(resultCode)) { apiAvailability.getErrorDialog(activity,resultCode,PLAY_SERVICES_RESOLUTION_REQUEST).show(); return PlayServicesUtils.ERROR_RESOLVABLE; } else { CLog.e(Constants.TAG,"This device does not support Google Play services."); return PlayServicesUtils.ERROR_UNRESOLVABLE; } } return PlayServicesUtils.AVAILABLE; } }
>为此Utility类实现阴影:
@Implements(PlayServicesUtils.class) public class ShadowPlayServicesUtils { @Implementation @PlayServicesUtils.PlayServicesAvailability public static int checkPlayServices(@NonNull Activity activity) { return PlayServicesUtils.AVAILABLE; } }
>为您的测试类(或基类测试类)添加阴影:
@Ignore @RunWith(TestRunner.class) @Config( sdk = 18,constants = BuildConfig.class,shadows = { ShadowPlayServicesUtils.class } ) public abstract class BaseTest { // some code,maybe }
>将您的影子添加到TestRunner的InstrumentationConfiguration创建中:
public class TestRunner extends RobolectricGradleTestRunner { public TestRunner(Class<?> klass) throws InitializationError { super(klass); } @Override public InstrumentationConfiguration createClassLoaderConfig() { InstrumentationConfiguration.Builder builder = InstrumentationConfiguration.newBuilder(); builder.addInstrumentedClass(PlayServicesUtils.class.getName()); return builder.build(); } }
原始答案:
我在Robolectric问题跟踪器上找到了similar issue,并在那里提供了解决方法 – 工作!
只需强制成功初始化Google Play服务:
@Before public void setUp() { // force success every time ShadowGooglePlayServicesUtil.setIsGooglePlayServicesAvailable(ConnectionResult.SUCCESS); }
编辑: