public void testBlackCount() {
    List<AnswerCombination> combinations = generateAnswerCombinationList();
    assertEquals(0, combinations.get(0).getBlackCount());
    assertEquals(1, combinations.get(1).getBlackCount());
    assertEquals(2, combinations.get(2).getBlackCount());
    assertEquals(3, combinations.get(3).getBlackCount());
    assertEquals(4, combinations.get(4).getBlackCount());
    assertEquals(2, combinations.get(5).getBlackCount());
    assertEquals(2, combinations.get(6).getBlackCount());
    assertEquals(2, combinations.get(7).getBlackCount());
    assertEquals(3, combinations.get(8).getBlackCount());
    assertEquals(4, combinations.get(9).getBlackCount());
    assertEquals(5, combinations.get(10).getBlackCount());
    assertEquals(0, combinations.get(11).getBlackCount());
  }