@Test
public void testObjectKeyIterable(){

    Iterable<Integer> objectKeys = SQLiteIndex.objectKeyIterable(data, Car.CAR_ID, null);
    assertNotNull(objectKeys);
    Iterator<Integer> objectKeysIterator = objectKeys.iterator();
    assertNotNull(objectKeysIterator);
    assertTrue(objectKeysIterator.hasNext());
    assertEquals(new Integer(1), objectKeysIterator.next());
    assertTrue(objectKeysIterator.hasNext());
    assertEquals(new Integer(2), objectKeysIterator.next());
    assertTrue(objectKeysIterator.hasNext());
    assertEquals(new Integer(3), objectKeysIterator.next());
    assertTrue(objectKeysIterator.hasNext());
    assertEquals(new Integer(4), objectKeysIterator.next());
    assertTrue(objectKeysIterator.hasNext());
    assertEquals(new Integer(5), objectKeysIterator.next());
    assertFalse(objectKeysIterator.hasNext());
}