@Test
  public void testReturnsFrameFromGifDecoder() throws IOException {
    Bitmap expected = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_4444);
    when(gifDecoder.getNextFrame()).thenReturn(expected);

    assertEquals(expected, resourceDecoder.decode(gifDecoder, 100, 100).get());
  }
 @Test
 public void testReturnsValidId() {
   Util.assertClassHasValidId(GifFrameResourceDecoder.class, resourceDecoder.getId());
 }