def test_process_free_position_pops_first_piece_from_list(self):
board = Board(3, 3)
piece_list = [King(), Queen()]
ChessManager.process_free_position(board, piece_list, 2, 2)
self.assertListEqual(piece_list, [Queen()])
def test_process_free_position_decrements_count_of_empty_positions(self):
board = Board(3, 3)
piece_list = [King()]
count = board.count_empty_positions()
ChessManager.process_free_position(board, piece_list, 2, 2)
self.assertGreater(count, board.count_empty_positions())
