title: test android application error
body: <p>Now a day I'm completing tutorial and I found this type of error in testApplication.
  what should i do?
  It's simple HeloAndroidTest application.</p>
  
  <p>Error is</p>
  
  <pre><code>java.lang.RuntimeException: Exception during suite construction
  at android.test.suitebuilder.TestSuiteBuilder$FailedToCreateTests.testSuiteConstructionFailed(TestSuiteBuilder.java:239)
  at java.lang.reflect.Method.invokeNative(Native Method)
  at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
  at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
  at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:529)
  at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447)
  Caused by: java.lang.reflect.InvocationTargetException
  at java.lang.reflect.Constructor.constructNative(Native Method)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
  at android.test.suitebuilder.TestMethod.instantiateTest(TestMethod.java:87)
  at android.test.suitebuilder.TestMethod.createTest(TestMethod.java:73)
  at android.test.suitebuilder.TestSuiteBuilder.addTest(TestSuiteBuilder.java:263)
  at android.test.suitebuilder.TestSuiteBuilder.build(TestSuiteBuilder.java:185)
  at android.test.InstrumentationTestRunner.onCreate(InstrumentationTestRunner.java:373)
  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3210)
  at android.app.ActivityThread.access$2200(ActivityThread.java:117)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:966)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:123)
  at android.app.ActivityThread.main(ActivityThread.java:3647)
  at java.lang.reflect.Method.invokeNative(Native Method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
  at dalvik.system.NativeStart.main(Native Method)
  Caused by: java.lang.NoClassDefFoundError: com.example.helloandroid.HelloAndroid
  at com.example.helloandroid.test.HelloAndroidTest.&lt;init&gt;(HelloAndroidTest.java:13)
  ... 18 more
  </code></pre>