Testing database on Android: ProviderTestCase2 or RenamingDelegatingContext?

Question

I\'ve implemented access to a database using SQLiteOpenHelper from the android.database package within some classes (with pattern DAO).

I wrote some jun

Answer 1

I have an application that uses a ContentProvider backed by an sqlite database to provide data to the application.

Let PodcastDataProvider be the actual dataprovider used by the application.

Then you can set up a test provider with something like the following:

public abstract class AbstractPodcastDataProvider extends ProviderTestCase2{
    public AbstractPodcastDataProvider(){
        this(PodcastDataProvider.class, Feed.BASE_AUTH);
    }

    public AbstractPodcastDataProvider(Class providerClass,
            String providerAuthority) {
        super(providerClass, providerAuthority);
    }

    public void setUp() throws Exception{
        super.setUp();

        //clear out all the old data.
        PodcastDataProvider dataProvider = 
            (PodcastDataProvider)getMockContentResolver()
            .acquireContentProviderClient(Feed.BASE_AUTH)
            .getLocalContentProvider();
        dataProvider.deleteAll();
    }
}

to setup a test data provider that will be backed by a different database than the actual application.

To test the DAO, create another class which extends AbstractPodcastDataProvider and use the

getMockContentResolver();

method to get an instance of a content resolver that will use the test database instead of the application database.