Monorepo
Moon.build (Moonrepo) is a task runner and monorepo management tool that tracks project dependencies, detects which projects are affected by a change, and runs only the tests that matter — drastically cutting CI time in large codebases. Key Takeaways 1. Moon uses a dependency graph to determine which projects are
Testing
Testing rate limiting requires verifying your application respects API limits, implements correct backoff, handles Retry-After headers, and doesn't cascade failures when throttled. This guide covers unit testing retry logic, integration testing rate limits, and load testing throttle behavior. Why Rate Limiting Testing Matters Almost every external API your
Testing
Push notification testing goes far beyond unit-testing your send function. This guide covers the full spectrum: verifying end-to-end delivery without a real device, testing silent push and background fetch correctly, asserting deep link behavior when notifications are tapped, validating badge count updates, and building testable notification analytics pipelines — all for
HTMX
HTMX handles server communication and DOM swaps; Alpine.js handles client-side interactivity within those swapped elements. Testing them together requires three layers: Alpine.js component unit tests (using @alpinejs/test), HTMX server-side partial tests (using your backend test client), and E2E tests (Playwright) for the full interaction cycle. Key Takeaways
Testing
OneSignal abstracts the complexity of FCM and APNS behind a unified REST API, but that means your integration is only as reliable as your HTTP layer. This guide covers testing OneSignal notification delivery, segment targeting, A/B test setup, and delivery reporting using Python with requests-mock and httpretty — all without
HTMX
Go's net/http/httptest package makes testing HTMX endpoints straightforward — create a recorder, set the HX-Request header, call your handler, and assert on the HTML response. This works with any Go web framework: Gin, Chi, Echo, or stdlib http.ServeMux. Go's speed makes HTMX integration tests
Testing
End-to-end checkout testing with Playwright covers the critical path from cart to order confirmation, including payment form interactions, address validation, edge cases like session expiry, and cross-browser compatibility for payment iframes. Why Checkout Needs Dedicated E2E Tests Checkout is the most valuable flow in any e-commerce application. A broken checkout
Testing
Web Push notifications rely on three moving parts: VAPID authentication, encrypted payloads using the Web Cryptography API, and browser subscription endpoints from push services like FCM or Mozilla's autopush. Testing all three layers without a real browser is entirely possible — this guide shows how using pywebpush in Python
HTMX
FastAPI is popular for APIs, but with Jinja2 templates it's a great HTMX backend too. Testing HTMX with FastAPI means using FastAPI's TestClient (Starlette-based) to send HX-Request headers and assert on HTML fragment responses, plus Playwright for browser-level interaction tests. Key Takeaways Use TestClient with headers=
Testing
Apple Push Notification Service (APNS) has stricter requirements than FCM: a 4096-byte payload limit, two distinct environments (sandbox and production), and a choice between certificate-based and JWT token-based authentication. This guide walks through testing APNS integrations in Python using httpx-based clients, mocked HTTP/2 connections, and payload size assertions — without
HTMX
Rails and HTMX are a natural fit — ERB templates serve HTML partials, and Rails' request specs test them efficiently. Testing HTMX in Rails means adding the HX-Request header to request specs, using Capybara for browser tests, and validating HTMX response headers like HX-Trigger and HX-Redirect. Key Takeaways Use headers:
Testing
Firebase Cloud Messaging (FCM) is the backbone of push notifications for Android, iOS, and web apps, but testing it without hitting real devices is a challenge most teams skip. This guide shows how to write reliable unit tests for FCM payloads, multicast sends, and topic subscriptions using unittest.mock in