带NullPointerException的BugSense

Question

我正在尝试创建一个简单的Robolectric单元测试(使用Gradle，在一定程度上遵循这里的示例http://www.peterfriese.de/android-testing-with-robolectric/)。

所有的设置似乎都是正确的，但是每当我运行测试时，由于在MyApplication.java类中发生了一些初始化，我就会得到以下信息。我觉得可能性很大，但有人知道为什么会发生这种事吗？

java.lang.RuntimeException: java.lang.NullPointerException
        at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:231)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
        at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:177)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
        at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:80)
        at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:47)
        at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:69)
        at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:49)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
        at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at org.gradle.messaging.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
        at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
        at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
        at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:103)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
        at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:355)
        at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:680)
    Caused by: java.lang.NullPointerException
        at com.bugsense.trace.Utils.CheckNetworkConnection(Unknown Source)
        at com.bugsense.trace.Utils.isWifiOn(Unknown Source)
        at com.bugsense.trace.Utils.setProperties(Unknown Source)
        at com.bugsense.trace.BugSenseHandler.initAndStartSession(Unknown Source)
        at com.app.application.onCreate(MyApplication.java:75)
        at org.robolectric.internal.ParallelUniverse.setUpApplicationState(ParallelUniverse.java:146)
        at org.robolectric.RobolectricTestRunner.setUpApplicationState(RobolectricTestRunner.java:387)
        at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:227)
        ... 35 more

如果我注释掉了BugSense初始化，那么我的测试就会像预期的那样成功。我宁愿不这样做，但如果没有其他解决方案，有什么推荐的方法，我可以检查一下，看看这个应用程序是否是由Robolectric启动的？

@Override
public void onCreate() {
    super.onCreate();
    ...
    // Commenting this line out corrects the issue.
    // BugSenseHandler.initAndStartSession(this, getString(R.string.bugsense_key));
    ...
}

Answer 1

最后，我需要用一个没有ProjectApplication初始化的TestProjectApplication类来子类我的BugSense类。我相信这个类是由Robolectric自动使用/注入的。我不记得我在哪里找到这个..。如果我记得的话会发回的。