this is my test

gistfile1.java

import android.app.Application;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import com.google.inject.AbstractModule;
import com.google.inject.Inject;
import com.google.inject.util.Modules;
import com.vurchase.core.ColumnType;
import com.vurchase.core.DataSource;
import com.vurchase.core.SQLiteHelper;
import com.vurchase.injected.LawnBizProdModule;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
import roboguice.RoboGuice;
import roboguice.activity.RoboActivity;
import static org.mockito.Mockito.*;

import static org.junit.Assert.*;

@RunWith(RobolectricTestRunner.class)
public class DataSourceTest {

    protected Application application = mock(Application.class, RETURNS_DEEP_STUBS);
    protected Context context = mock(RoboActivity.class, RETURNS_DEEP_STUBS);
    protected SQLiteHelper dbHelper = mock(SQLiteHelper.class, RETURNS_DEEP_STUBS);
    protected CustomerSchema schema = mock(CustomerSchema.class,RETURNS_DEEP_STUBS);
    protected SQLiteDatabase database = mock(SQLiteDatabase.class, RETURNS_DEEP_STUBS);

    @Before
    public void setUp() {

        RoboGuice.setBaseApplicationInjector(application, RoboGuice.DEFAULT_STAGE,
                Modules.override(RoboGuice.newDefaultRoboModule(application)).with(new DataSourceTestModule()));

        when(context.getApplicationContext()).thenReturn(application);
        when(application.getApplicationContext()).thenReturn(application);

        //set up the record schema
        String[] columnNames = { "_id", "created_at", "updated_at", "name" };
        ColumnType[] columnTypes = { ColumnType.INTEGER, ColumnType.INTEGER, ColumnType.INTEGER, ColumnType.TEXT };

        when(schema.getColumnNames()).thenReturn(columnNames);
        when(schema.getColumnTypes()).thenReturn(columnTypes);
        when(schema.getTable()).thenReturn("customers");

        //don't know what to do here, when the DataSource.save() method gets run, the the third argument of insert() won't be null
        when(database.insert("customers",null,null)).thenReturn(Long.valueOf(4));

    }

    @After
    public void teardown() {
        // Don't forget to tear down our custom injector to avoid polluting other test classes
        RoboGuice.util.reset();
    }

    @Test
    public void testDatasourceIsTestIsWorking(){

        DataSource dataSource = RoboGuice.getInjector(context).getInstance(DataSource.class);

        Customer customer = mock(Customer.class, RETURNS_DEEP_STUBS);


        when(customer.getSchema()).thenReturn(schema);
        when(customer.getValue("_id")).thenReturn(0);
        when(customer.getValue("created_at")).thenReturn(0);
        when(customer.getValue("updated_at")).thenReturn(0);
        when(customer.getValue("name")).thenReturn("Test Name");

        assertNotNull("Datasource test is running", "");

    }

    public class DataSourceTestModule extends AbstractModule {
        @Override
        protected void configure() {
            bind(SQLiteHelper.class).toInstance(dbHelper);
            bind(CustomerSchema.class).toInstance(schema);
            bind(SQLiteDatabase.class).toInstance(database);
        }
    }
}