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PONoClassDefFoundError while executing Android JUnit test
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  1. PONoClassDefFoundError while executing Android JUnit test
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    copied!<p>First of all, there are similar questions like <a href="https://stackoverflow.com/questions/5758966/java-lang-noclassdeffounderror-in-android-test-servicetestcase">here</a> or <a href="https://stackoverflow.com/questions/2247998/noclassdeffounderror-eclipse-and-android">here</a> but I have neither some external libs nor a lib folder nor some included jars or something, so I wonder what I'm doing wrong by running Android Junit tests. </p> <p>My project structure looks like this:<br> <img src="https://i.stack.imgur.com/84g1N.jpg" alt="enter image description here"></p> <p>As you can see I have a separate project for Android JUnit tests. The testing class looks like this: </p> <pre><code>public class PersistenceManager { private static final String FILENAME = "kpzwien_storage"; public static void persist(String data, Context context) throws IOException { FileOutputStream fos = context.openFileOutput(FILENAME, Context.MODE_PRIVATE); fos.write(data.getBytes()); fos.close(); } public static String read(Context context) throws IOException { FileInputStream fis = context.openFileInput(FILENAME); StringBuffer fileContent = new StringBuffer(""); byte[] buffer = new byte[1024]; while (fis.read(buffer) != -1) { fileContent.append(new String(buffer)); } return fileContent.toString(); } } </code></pre> <p>and here is its test case: </p> <pre><code>public class PersistenceManagerTest extends AndroidTestCase { private final String FILENAME_PREFIX = "test."; @Before public void setUp() { MockContentResolver resolver = new MockContentResolver(); RenamingDelegatingContext renamingDelegatingContext = new RenamingDelegatingContext(new MockContext(), getContext(), FILENAME_PREFIX); Context context = new IsolatedContext(resolver, renamingDelegatingContext); setContext(context); } public void testPersistAndRead() throws IOException { String testData = "foobar"; PersistenceManager.persist(testData, getContext()); String result = PersistenceManager.read(getContext()); assertEquals(testData, result); } } </code></pre> <p>The manifest of the test project looks like this: </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="net.devgems.android.kurzparkzonewien.androidtests" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-sdk android:minSdkVersion="4" /&gt; &lt;instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="net.devgems.android.kurzparkzonewien.activities" /&gt; &lt;application android:icon="@drawable/ic_launcher" android:label="@string/app_name" &gt; &lt;uses-library android:name="android.test.runner" /&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>targetPackage is the application that the Instrumentation object will run against which is is identified by the package name assigned in its manifest file by the element. (Source: <a href="http://developer.android.com/guide/topics/manifest/instrumentation-element.html" rel="nofollow noreferrer">http://developer.android.com/guide/topics/manifest/instrumentation-element.html</a></p> <p>The name of the package in my main project is </p> <blockquote> <p>package="net.devgems.android.kurzparkzonewien.activities"</p> </blockquote> <p>So it is exactly where targetPackage points to. If I run as "Android JUnit test", I always get a NoClassDefFoundError but why? Any ideas? I'm using <strong>ADT 20.0.3</strong>, <strong>Eclipse Juno</strong>.</p> <p>At last here is the logcat output: </p> <blockquote> <p>09-22 16:00:12.745: I/TestRunner(1528): java.lang.NoClassDefFoundError: net.devgems.android.kurzparkzonewien.controller.PersistenceManager 09-22 16:00:12.745: I/TestRunner(1528): at net.devgems.android.kurzparkzonewien.androidtests.PersistenceManagerTest.testPersistAndRead(PersistenceManagerTest.java:32) 09-22 16:00:12.745: I/TestRunner(1528): at java.lang.reflect.Method.invokeNative(Native Method) 09-22 16:00:12.745: I/TestRunner(1528): at java.lang.reflect.Method.invoke(Method.java:521) 09-22 16:00:12.745: I/TestRunner(1528): at junit.framework.TestCase.runTest(TestCase.java:154) 09-22 16:00:12.745: I/TestRunner(1528): at junit.framework.TestCase.runBare(TestCase.java:127) 09-22 16:00:12.745: I/TestRunner(1528): at junit.framework.TestResult$1.protect(TestResult.java:106) 09-22 16:00:12.745: I/TestRunner(1528): at junit.framework.TestResult.runProtected(TestResult.java:124) 09-22 16:00:12.745: I/TestRunner(1528): at junit.framework.TestResult.run(TestResult.java:109) 09-22 16:00:12.745: I/TestRunner(1528): at junit.framework.TestCase.run(TestCase.java:118) 09-22 16:00:12.745: I/TestRunner(1528): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169) 09-22 16:00:12.745: I/TestRunner(1528): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154) 09-22 16:00:12.745: I/TestRunner(1528): at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:430) 09-22 16:00:12.745: I/TestRunner(1528): at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447) 09-22 16:00:12.745: I/TestRunner(1528): ----- end exception -----</p> </blockquote>
 

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