@Test
  public void testPokerPlayerCheckFlush() {
    PokerPlayer testPlayer = new PokerPlayer();

    testPlayer.setPlayer("Player1 TwoHearts ThreeHearts FourHearts FiveHearts SixHearts");

    // testing checkFlush()
    assertEquals(6, testPlayer.checkFlush());
    // non-flush
    testPlayer.setPlayer("Player1 FiveHearts ThreeHearts SixHearts TwoHearts FourClubs");
    testPlayer.sortHand();
    assertEquals(-1, testPlayer.checkFlush());
  }