Ollama 66b6c99384 Extract reward logic to Reward_lib library and add unit tests ...

- Create app/Libraries/Reward_lib.php with reward point business logic:
  - calculatePointsEarned(): calculate rewards from purchase amount
  - adjustRewardPoints(): deduct/restore/adjust customer points
  - handleCustomerChange(): handle points when customer changes on sale
  - adjustRewardDelta(): adjust delta for same customer payment changes
  - hasSufficientPoints(): validate customer has enough points
  - getPointsBalance(): get customer points balance
  - calculateRewardPaymentAmount(): sum reward payments from array

- Add tests/Libraries/Reward_libTest.php with 20+ test cases covering:
  - Points calculation edge cases
  - Customer change scenarios
  - Deletion/restore operations
  - Sufficient points validation
  - Payment amount calculation

- Update tests/phpunit.xml to include Libraries testsuite

This extraction centralizes reward logic for better testability and
follows the existing library pattern (Tax_lib, Sale_lib, etc.).

2026-03-17 15:00:57 +00:00

652 B

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