@KeyboardExtension.KeyboardExtensionType
  public int getExtensionType() {
    return mExtensionType;
  }
@Test
  public void testGetCurrentKeyboardExtensionTopChanged() throws Exception {
    AnyApplication.getTopRowFactory(getApplicationContext())
        .setAddOnEnabled("642e9690-ded5-11e0-9572-0800200c9a66", true);
    KeyboardExtension extension =
        AnyApplication.getTopRowFactory(getApplicationContext()).getEnabledAddOn();
    Assert.assertNotNull(extension);
    Assert.assertEquals("642e9690-ded5-11e0-9572-0800200c9a66", extension.getId());
    Assert.assertEquals(KeyboardExtension.TYPE_TOP, extension.getExtensionType());
    Assert.assertEquals(R.xml.ext_kbd_top_row_normal, extension.getKeyboardResId());
  }