FragmentActivity Junit Testing

Question

Me used Fragment of Android Compatibility Package, using the android-support-v4.jar. But I can't do the JUnit test on this.

My main FragmentActivity class is declared as follows

public class MyActivityClass extends FragmentActivity{
...............
}

Then in my test project

public class MyActivityClassTest extends ActivityInstrumentationTestCase2<MyActivityClass> {
    public MyActivityClassTest() {  
        super("com.android.myproject", MyActivityClass.class);
    }
    @Override
    protected void setUp() throws Exception {
        super.setUp();
        ...................
    }

    public void testPreconditions() {
        .................
    }
    public void testNotNull(){
        ................
    }
}

But when I run as Android JUnit Test produce FailedToCreateTests[Runner:Junit3]
Failure Trace

java.lang.RuntimeException: Exception during suite construction
at android.test.suitebuilder.TestSuiteBuilder$FailedToCreateTests.testSuiteConstructionFailed(TestSuiteBuilder.java:239)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:430)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447)
Caused by: java.lang.reflect.InvocationTargetException
at com.android.myproject.test.MyActivityClassTest.<init>(MyActivityClassTest.java:28)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
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:336)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3982)
at android.app.ActivityThread.access$2900(ActivityThread.java:119)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1901)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4363)
at java.lang.reflect.Method.invokeNative(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NoClassDefFoundError: com.android.myproject.MyActivityClass
... 19 more

When I changed MyActivityClass to extends Activity it worked fine (MyActivityClass extends Activity)
Me used the same android-support-v4.jar in my both test and main project

Answer 1

ActivityInstrumentationTestCase2 is compatible with Fragments. You should only follow the steps mentioned in Android Testing: External libraries, which has been updated to cover the case of the android-support-v4.jar too.

Then, you will be able to write tests like this one:

public void testFragmentManager() {
    FragmentActivity activity = getActivity();
    assertNotNull(activity.getSupportFragmentManager());
}

or whatever you need to test.

Answer 2

I found a solution

The problem was

Caused by: java.lang.NoClassDefFoundError: com.android.myproject.MyActivityClass

It cannot find the class path even though I refer the same jar in both projects ( I also tried by using separate jar for both the project )

Now, I created my testing environment in the same project, then it worked

In my AndroidManifest.xml

<manifest...>
    <!-- For doing JUnit test, Instrumentation Start (remove later) -->
    <instrumentation
        android:targetPackage="com.pe.android.isccasinos"
        android:name="android.test.InstrumentationTestRunner" />
    <!-- For doing JUnit test, Instrumentation End (remove later) -->   
    <application ...>
    ................
    <!-- For doing JUnit test, add library starting (remove later) -->
        <uses-library
            android:name="android.test.runner" />
        <!-- For doing JUnit test, add library ending (remove later) -->
    </application>
<manifest>

Then I added my Testing class in my special package for testing

extends ActivityInstrumentationTestCase2<fragmentActivity>

Now everything is working fine :)

Answer 3

See this question for a better answer:

FragmentActivity can not be tested via ActivityInstrumentationTestCase2

You need to export the reference to the compatibility library from your app.