Do you remember the turn that we hard coded to be always 1? Let's fix that behavior.

We can invoke the play method twice and verify that the turn changes from 1 to 2:

@Test 
public void whenPlayInvokedMultipleTimesThenTurnIncreases() {
  TicTacToeBean move1 = new TicTacToeBean(1, 1, 1, 'X'); 
  ticTacToe.play(move1.getX(), move1.getY()); 
  verify(collection, times(1)).saveMove(move1);
  TicTacToeBean move2 = new TicTacToeBean(2, 1, 2, 'O'); 
  ticTacToe.play(move2.getX(), move2.getY()); 
  verify(collection, times(1)).saveMove(move2); 
}