def test_copy_with_filled_board(self):
"""
Copying a board that has pieces in it should return an exact copy with all the same pieces.
"""
board = Board()
board.set_square(1, 'X')
board.set_square(3, 'O')
board.set_square(6, 'O')
board.set_square(7, 'X')
new_board = board.copy()
self.assertListEqual(['X', None, 'O', None, None, 'O', 'X', None, None], new_board.squares)
def test_copy_with_blank_board(self):
"""
Copying a blank board should create a new blank board. Modifying the squares on one should not change the
squares on the other.
"""
board = Board()
new_board = board.copy()
self.assertListEqual([None] * 9, new_board.squares)
new_board.set_square(1, 'X')
self.assertIsNone(board.get_square(1))
self.assertEqual(new_board.get_square(1), 'X')
