问题与Robolectric与新版Google Play服务
我使用Robolectric进行单元测试，我的项目中有Google Play服务。 这工作得很好，直到昨天，当Google Play服务更新到新版本。 我得到这个错误：
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
看起来Shadow类没有被调用，GooglePlayServicesUtil被称为给出NullPointerException。 有没有人看过这个？
我甚至没有在测试中使用Google Play服务。
我已经添加了下一个解决方法，它工作正常：
将所有PlayServices的相关代码提取到Utility类（在我的情况下它只是可用性检查）：
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（或基础测试类）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：
我发现Robolectric问题跟踪器上的类似问题以及在此提供的解决方法 - 正常工作！
只需强制成功初始化Google Play服务即可：
@Before public void setUp() {
// force success every time
ShadowGooglePlayServicesUtil.setIsGooglePlayServicesAvailable(ConnectionResult.SUCCESS);
}
编辑：
但Play Services 8.3和8.4还有另一个问题。 而这个问题仍然没有解决。
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