java.lang.NoClassDefFoundError when running android unit test to test FragmentActivity with ActivityInstrumentationTestCase2

Question

I am trying test an Activity derived from FragmentActivity(from android-support-v4.jar) using ActivityInstrumentationTestCase2. The android-support-v4.jar is located in the libs folder of my main project(tested project). To make the test project pass the build, I add add a link from the main project to the test project with command "ln ../mainProject/libs/android-support-v4.jar ./libs/android-support-v4.jar" in my test project root directory. It is recommended by http://dtmilano.blogspot.com/2009/12/android-testing-external-libraries.html?showComment=1348480869133. Following the guideline from the blog, I can run the test with Eclipse successfully. However, when I try to run the test with command "ant clean debug install test", I will always met the below exception:

[exec] android.test.suitebuilder.TestSuiteBuilder$FailedToCreateTests:
[exec] Error in testSuiteConstructionFailed:
[exec] java.lang.RuntimeException: Exception during suite construction
[exec]     at android.test.suitebuilder.TestSuiteBuilder$FailedToCreateTests.testSuiteConstructionFailed(TestSuiteBuilder.java:239)
[exec]     at java.lang.reflect.Method.invokeNative(Native Method)
[exec]     at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
[exec]     at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
[exec]     at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:520)
[exec]     at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447)
[exec] Caused by: java.lang.reflect.InvocationTargetException
[exec]     at com.test.QuestionListActivityTest.<init>(QuestionListActivityTest.java:17)
[exec]     at java.lang.reflect.Constructor.constructNative(Native Method)
[exec]     at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
[exec]     at android.test.suitebuilder.TestMethod.instantiateTest(TestMethod.java:87)
[exec]     at android.test.suitebuilder.TestMethod.createTest(TestMethod.java:73)
[exec]     at android.test.suitebuilder.TestSuiteBuilder.addTest(TestSuiteBuilder.java:263)
[exec]     at android.test.suitebuilder.TestSuiteBuilder.build(TestSuiteBuilder.java:185)
[exec]     at android.test.InstrumentationTestRunner.onCreate(InstrumentationTestRunner.java:373)
[exec]     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4218)
[exec]     at android.app.ActivityThread.access$3000(ActivityThread.java:125)
[exec]     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2071)
[exec]     at android.os.Handler.dispatchMessage(Handler.java:99)
[exec]     at android.os.Looper.loop(Looper.java:123)
[exec]     at android.app.ActivityThread.main(ActivityThread.java:4627)
[exec]     at java.lang.reflect.Method.invokeNative(Native Method)
[exec]     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
[exec]     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
[exec]     at dalvik.system.NativeStart.main(Native Method)
[exec] Caused by: java.lang.NoClassDefFoundError: com.activity.QuestionListActivity
[exec]     ... 19 more

Here is the snap of test code:

 public class QuestionListActivityTest extends ActivityInstrumentationTestCase2<QuestionListActivity>{
    private Solo solo;
    private FragmentActivity activity;

 public QuestionListActivityTest() {  
     super(QuestionListActivity.class); **// the exception happened here**
 }
...
}

I am using android sdk R15. The test was run with the emulator. Does anybody know how to solve it? I really need to run it with ant so as to integrate with hudson. Thanks in advance!

Answer 1

Have you checked the related issue here?

It is similar to yours.