[FIX] stock: quant: _update_reserved_quantity and negative quantity

If we have multiple quants returned when we want to decrease the
reservation of a move line, the min function will always return the
quantity passed in argument because 'reserved_quantity' is always a
positive number and quantity a negative one. This can lead to negative
reserved quantity on a quant, if the quantity to reserve on the first
quant is lower than the absolute value of the quantity to decrease.

To fix this, we correctly separate the behaviors for decrease and
increase.

We add a test that show the, now fixed, bug.

0 files changed, 0 insertions, 0 deletions