Validating complex calculation logic in Magento custom modules

[thomlevi9ge1ec]

Hi everyone,

I’ve been building a custom Magento 2 module where calculations depend on multiple conditions for example, years of service, contract type, and type of exit (resignation vs termination). The logic seems to work in basic cases, but I wanted to be sure it aligns with real-world scenarios.

To double-check the accuracy, I compared my output with a UAE gratuity calculator tool that handles these conditions under the latest labour law. It helped me spot some mistakes in edge cases.

Has anyone here used external references or tools to validate their Magento module calculations before pushing them live? Would love to hear best practices.

[auermauree502f]

You’re on the right track comparing against a trusted external calculator.

For best practice:

Unit-test each condition separately (service years, contract type, exit type) with PHPUnit.

Create edge-case datasets (e.g., exact 1/3/5 years, partial months, mixed contract changes).

Cross-check a sample of results with at least two external references or a legal/accounting source.

Add integration tests in a staging store to ensure totals stay correct after updates.

This layered testing usually catches most logic gaps before going live.