def test_drop_lines_single():
b = Board(10, 22)
b.current_tetromino = Tetromino("O", SPAWN["O"], COLORS["O"])
b.ghost_tetromino = b.get_ghost_tetromino()
for i in range(10):
b.board_tetrominos_squares.append(Square(Point(i, 0), colors.ASH))
b.board_tetrominos_squares.append(Square(Point(0, 1), colors.ASH))
b.board_tetrominos_squares.append(Square(Point(1, 1), colors.ASH))
b.board_tetrominos_squares.append(Square(Point(2, 1), colors.ASH))
b.update_matrices()
filled_indices = b.get_filled_indices()
b.clear_lines(filled_indices)
b.drop_lines(filled_indices)
b.update_matrices()
ghost_squares = b.ghost_tetromino.squares
assert ghost_squares[0].x == 4
assert ghost_squares[0].x == 4
assert ghost_squares[0].y == 0
assert ghost_squares[1].x == 5
assert ghost_squares[1].y == 0
assert ghost_squares[2].x == 5
assert ghost_squares[2].y == 1
assert ghost_squares[3].x == 4
assert ghost_squares[3].y == 1
for i in range(3):
assert b.board_tetrominos_matrix[i][0] == 1
for i in range(3, 10):
assert b.board_tetrominos_matrix[i][0] == 0
