使用ActivityUnitTestCase时的RuntimeException,但不是ActivityInstrumentationTestCase2时的RuntimeException

时间:2013-08-07 12:03:18

标签: java android junit instrumentation

我正在尝试使用ActivityUnitTestCase测试Android应用程序的MainActvity。由于某种原因,我甚至无法启动测试,因为它失败并出现以下错误跟踪:

java.lang.RuntimeException: Exception during suite construction
at android.test.suitebuilder.TestSuiteBuilder$FailedToCreateTests.testSuiteConstructionFailed(TestSuiteBuilder.java:238)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:537)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1594)
Caused by: java.lang.NullPointerException: name == null
at java.lang.Class.getConstructorOrMethod(Class.java:446)
at java.lang.Class.getMethod(Class.java:915)
at android.test.suitebuilder.TestMethod.getAnnotation(TestMethod.java:60)
at android.test.suitebuilder.annotation.HasMethodAnnotation.apply(HasMethodAnnotation.java:39)
at android.test.suitebuilder.annotation.HasMethodAnnotation.apply(HasMethodAnnotation.java:30)
at com.android.internal.util.Predicates$OrPredicate.apply(Predicates.java:106)
at android.test.suitebuilder.annotation.HasAnnotation.apply(HasAnnotation.java:42)
at android.test.suitebuilder.annotation.HasAnnotation.apply(HasAnnotation.java:31)
at com.android.internal.util.Predicates$NotPredicate.apply(Predicates.java:122)
at android.test.suitebuilder.TestSuiteBuilder.satisfiesAllPredicates(TestSuiteBuilder.java:253)
at android.test.suitebuilder.TestSuiteBuilder.build(TestSuiteBuilder.java:189)
at android.test.InstrumentationTestRunner.onCreate(InstrumentationTestRunner.java:371)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3943)
at android.app.ActivityThread.access$1300(ActivityThread.java:127)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1189)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4447)
at java.lang.reflect.Method.invokeNative(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)

我无法调试它,因为它在到达我可以放入测试用例类的任何断点之前失败了。我正在使用ActivityInstrumentationTestCase2类进行的任何测试都没有问题。

在控制台中显示以下错误消息:

Test run failed: Instrumentation run failed due to 'java.lang.RuntimeException'

我认为,它暗示无法成功调用getInstrumentation()。如果是这样,我怎么能创建一个有效的Intent来启动MainActivity?

使用ActivityUnitTestCase的代码:

public class MainActivityUnitTest extends 
    android.test.ActivityUnitTestCase<MainActivity> {

    private MainActivity activity;

    public MainActivityUnitTest(String name) {
        super(MainActivity.class);
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();  
    }

    @SmallTest
    public void testActivity() {

        Intent intent = new Intent(getInstrumentation().getTargetContext(),
                MainActivity.class);
            startActivity(intent, null, null);
            activity = getActivity();       
        assertNotNull(activity);
    }
}

感谢您提供的任何帮助。

2 个答案:

答案 0 :(得分:2)

问题出在构造函数中的参数“name”中。移除它时,它运行得非常好。 :)

答案 1 :(得分:1)

我在构造函数中调用setName()并且它可以工作。
试试这个:

  

public MainActivityUnitTest(String name){

     
super(MainActivity.class);
setName("MainActivity");
         

}