def test_try_move_on_invalid_column(self):
board = Board()
column_to_fill = 1
for i in range(board.height):
board.board[i][column_to_fill] = 1
# Placement in column should now fail
assert board.try_move(column_to_fill) == -1
# Other columns should still be valid
assert board.try_move(column_to_fill + 1) >= 0
def test_try_move_on_valid_column(self):
board = Board()
for i in range(board.width):
col = board.try_move(i)
# expected position is bottom of board
assert col == board.height - 1
