* Add new test case for discounts:
Two discounts:
- "For every 1 item1, you get three item2 for 10 % off."
- "For every 1 item1, you get five item3 for 10 % off."
Cart: 2x item1, 2x item2, 6x item3
Expected result: 2x item1 full price, 2x item2 discounted, 5x item3 discounted, 1x item3 full price
* Fix discount calculation bug
* Update src/pretix/base/models/discount.py
Co-authored-by: Raphael Michel <michel@rami.io>
* Update src/pretix/base/models/discount.py
Co-authored-by: Richard Schreiber <schreiber@rami.io>
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Co-authored-by: Raphael Michel <michel@rami.io>
Co-authored-by: Richard Schreiber <schreiber@rami.io>
