  @Test
  public void missingMiddleContainerXOR() {

    RoaringBitmap one = testCase().withRunAt(0).withBitmapAt(1).withArrayAt(2).build();
    RoaringBitmap two = testCase().withBitmapAt(0).withArrayAt(2).build();
    RoaringBitmap three = testCase().withArrayAt(0).withBitmapAt(1).withArrayAt(2).build();
    assertEquals(FastAggregation.xor(one, two, three), ParallelAggregation.xor(one, two, three));
  }