def test_print_filled_square(self):
"""
Printing a square with a piece in it should result in that piece ('X' or 'O').
"""
board = Board()
board.set_square(1, 'X')
self.assertEqual('X', board.print_square(1))
def test_print_empty_square(self):
"""
Printing an empty square should result in ' '.
"""
board = Board()
self.assertEqual(' ', board.print_square(1))
