Testing RoboContentProvider using ProviderTestCase2

[Alex Horsa]

Hello,

I'm trying to write some tests for a RoboContentProvider.

public class DatabaseProvider extends RoboContentProvider {

    public static final String TAG = "DatabaseProvider";

    @Inject

    protected BaseDatabaseHelper mDatabaseHelper;

    @Override

    public boolean onCreate() {

        super.onCreate();

        return true;

    }

}

public class TestContentProvider extends ProviderTestCase2<DatabaseProvider> {

    public TestContentProvider() {

        super(DatabaseProvider.class, DatabaseContract.CONTENT_AUTHORITY);

    }

    public void testQueryQuestions() {

        ContentProvider contentProvider = getProvider();

        Cursor cursor = contentProvider.query(DatabaseContract.Question.CONTENT_URI, null, null, null, null);

        assertNotNull(cursor);

    }

}

The output:

java.lang.ClassCastException: android.test.ProviderTestCase2$MockContext2 cannot be cast to android.app.Application

at roboguice.RoboGuice.getInjector(RoboGuice.java:148)

at roboguice.content.RoboContentProvider.onCreate(RoboContentProvider.java:17)

at com.app.providers.DatabaseProvider.onCreate(DatabaseProvider.java:41)

at android.content.ContentProvider.attachInfo(ContentProvider.java:1214)

at android.content.ContentProvider.attachInfoForTesting(ContentProvider.java:1178)

at android.test.ProviderTestCase2.setUp(ProviderTestCase2.java:143)

at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)

at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)

at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)

at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1738)

From what I understand is that the ProviderTestCase2 doesn't have the Application context. Is it possible to write tests for robo content providers using this class? 

[Alex Horsa]

I found a workaround which may help others. I am still curious why ProviderTestCase2 doesn't work.

Code inspired from ProviderTestCase2:

public class MyProviderTestCase extends AndroidTestCase {

    MockContentResolver mResolver;

    ContentProvider mProvider;

    @Override

    protected void setUp() throws Exception {

        super.setUp();

        mResolver = new MockContentResolver();

        mProvider = new DatabaseProvider(); // This can be parameterized

        mProvider.attachInfo(getContext().getApplicationContext(), null);

        assertNotNull(mProvider);

        mResolver.addProvider(DatabaseContract.CONTENT_AUTHORITY, getProvider());

    }

    public ContentProvider getProvider() {

        return mProvider;

    }