def test_hold_current_tetromino():
b = Board(10, 22)
m = Movement(b)
assert b.held_tetromino is None
last_tetromino_id = b.current_tetromino.id
# should hold current tetromino
b.hold_current_tetromino()
assert b.held_tetromino.id == last_tetromino_id
# not dropped yet, so held tetromino should be unchanged
b.hold_current_tetromino()
assert b.held_tetromino.id == last_tetromino_id
# drop tetromino then hold, held tetromino should replace current
m.hard_drop()
b.hold_current_tetromino()
assert b.held_tetromino.id != last_tetromino_id
assert b.current_tetromino.id == last_tetromino_id
# test held tetromino position gets reset if moved before holding
b.current_tetromino.offset(-1, 0)
assert (b.current_tetromino.origin.x, b.current_tetromino.origin.y) != \
(SPAWN[b.current_tetromino.id].x, SPAWN[b.current_tetromino.id].y)
b.hold_current_tetromino()
m.hard_drop()
b.hold_current_tetromino()
assert (b.current_tetromino.origin.x, b.current_tetromino.origin.y) == \
(SPAWN[b.current_tetromino.id].x, SPAWN[b.current_tetromino.id].y)
