public void testPokerPlayerCheckFourOAK() {
    PokerPlayer testPlayer = new PokerPlayer();

    // testing checkFourOAK()
    testPlayer.setPlayer("Player1 TwoHearts TwoDiamonds TwoClubs TwoSpades SixHearts");
    testPlayer.sortHand();
    assertEquals(2, testPlayer.checkFourOAK());
    // non-4OAK
    testPlayer.setPlayer("Player1 FiveHearts ThreeHearts NineHearts TwoHearts FourClubs");
    testPlayer.sortHand();
    assertEquals(-1, testPlayer.checkFourOAK());
  }