Testing
Mixpanel powers product analytics for funnels, retention, and segmentation. Testing Mixpanel integrations requires mocking the SDK, validating event schemas against your Lexicon, testing people property updates, and isolating test environments so CI events don't corrupt your production data. This guide covers all of this with practical Jest examples
Testing
PostHog combines product analytics, feature flags, session recording, and A/B testing in one platform. Testing PostHog integrations requires more than mocking — you need to test feature flag evaluation, verify event tracking, and ensure session recording is properly configured without capturing sensitive data. This guide covers all three layers with
Testing
Amplitude tracking bugs are silent — the app works, but your growth metrics are wrong. Funnel drop-offs appear where users actually convert. Revenue numbers are off. This guide covers how to unit test Amplitude SDK tracking with Jest mocks, validate event schemas against your taxonomy, test funnel event sequences, and
Testing
Broken analytics tracking is one of the hardest bugs to detect — the app works fine, but your data pipeline silently receives malformed events or nothing at all. This guide covers testing Segment analytics.js event tracking: mocking the Segment library, validating event schemas in unit tests, verifying event delivery in
Test Reporting
Plain Mocha test output gets the job done in local development, but in CI environments and for team review, you need richer reporting. Mochawesome generates beautiful, interactive HTML reports with test details, timing, code snippets, and failure screenshots — all in a self-contained file you can share or archive. What
E2E Testing
Most E2E testing frameworks depend on WebDriver or browser-specific binaries. TestCafe takes a completely different approach: it injects a proxy server between your test script and the browser, injecting automation scripts directly into web pages. No WebDriver. No browser plugins. Just Node.js and a URL. This architectural choice
E2E Testing
Browser automation used to mean wrestling with Selenium's verbose Java APIs. Nightwatch.js changed that for JavaScript teams by wrapping WebDriver in a clean, Node.js-native API. Since its 2014 debut, it has grown into a full-featured E2E testing framework with built-in test runner, parallel