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Deeman 9703651562 add hybrid calculator refactor and comprehensive billing test suite

Move planner financial model from client-side JS to server-side Python
(calculator.py + /planner/calculate endpoint). Add full test coverage:
227 calculator tests and 371 billing tests covering SQL helpers,
webhooks, routes, and subscription gating with Hypothesis fuzzing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-13 12:05:03 +01:00

2.2 KiB

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog.

[Unreleased]

Added

Server-side financial calculator (planner/calculator.py) — ported JS calc(), pmt(), calcIRR() to Python so the full financial model is no longer exposed in client-side JavaScript
POST /planner/calculate endpoint for server-side computation
Pre-computed initial data (window.__PADELNOMICS_INITIAL_D__) injected on page load for instant first render
Debounced API fetch pattern in planner.js with AbortController for in-flight request cancellation
Computing indicator CSS (.planner-app--computing) with subtle "computing..." text
Comprehensive test suite for calculator (tests/test_calculator.py — 227 tests) covering all 4 venue/ownership combos, edge cases, and Hypothesis property-based fuzzing
Comprehensive billing test suite (371 tests total):
- tests/conftest.py — shared fixtures (DB, app, clients, subscriptions, webhook helpers)
- tests/test_billing_helpers.py — unit tests for SQL helpers, feature/limit access, plan determination (60+ tests + parameterized + Hypothesis)
- tests/test_billing_webhooks.py — integration tests for LemonSqueezy webhooks (signature verification, all lifecycle events, Hypothesis fuzzing)
- tests/test_billing_routes.py — route tests (pricing, checkout, manage, cancel, resume, subscription_required decorator)
- Added hypothesis>=6.100.0 and respx>=0.22.0 to dev dependencies for property-based testing and httpx mocking
- Factored into Copier template — all billing tests now generate as .jinja templates with provider-specific conditionals for Stripe, Paddle, and LemonSqueezy at /var/home/Deeman/Projects/materia_saas_boilerplate/{{project_slug}}/tests/

Changed

planner.js no longer contains calc(), pmt(), or calcIRR() functions — computation moved server-side
render() split into render() (tab switching + schedule calc) and renderWith(d) (DOM updates from data)
Tab switching now renders from _lastD cache (instant, no API call)
Slider input triggers 200ms debounced server call instead of synchronous client-side calc

2.2 KiB Raw Blame History

Changelog

[Unreleased]

Added

Changed

2.2 KiB

Raw Blame History