Summary

The category purchase values in new purchase / edit purchase should be constrained to be non-negative

Why?

Hygiene

Details

To see this, sign in as [email protected], then click "Purchases" and "New Purchase" in the left-hand menu.
Enter enough information to be able to save, including at least one negative number in the "purchase total for..." (still have the purchase total add up to the 4 category totals. Save.

It allows it! And shouldn't.

Put in checks so that none of the 'Purchase Total for..." fields can be negative.

Criteria for completion

• behaviour as described above
• tests to confirm behaviour as described above.