In-depth tutorials and comparisons for testing tools and frameworks — Playwright, Cypress, Selenium, Robot Framework, and more.
Browser Testing
Cross-browser testing used to mean maintaining a lab of physical devices and running multiple VMs with different browser versions. BrowserStack Live eliminates that infrastructure problem by giving you instant remote access to real browsers and real devices through your browser. This guide covers what BrowserStack Live offers, how to
Test Automation
Bazel is a build and test tool originally developed at Google to handle monorepos at extreme scale.
Test Automation
Microservices architectures give teams the freedom to deploy independently — but that freedom comes with a hidden tax: integration failures discovered late in the pipeline, or worse, in production. Consumer-driven contract testing with Pact is the most practical solution to this problem that exists today. This post covers what contract
Test Automation
Azure DevOps Pipelines offer one of the most feature-rich CI environments available, but many teams only scratch the surface.
Test Automation
Schema evolution is one of the most underappreciated risks in event-driven architectures.
Test Automation
Distributed tracing is one of the most valuable observability tools in a microservices architecture.
Tools & Frameworks
fast-check is the leading property-based testing library for JavaScript and TypeScript. It brings Haskell's QuickCheck model to the JS ecosystem with full TypeScript types, a rich built-in arbitrary library, model-based testing for stateful systems, and seamless integration with Jest, Vitest, and Mocha. Key Takeaways
Tools & Frameworks
Hypothesis is Python's most powerful property-based testing library. It extends pytest with the @given decorator and a rich strategy API so you can describe the shape of your inputs rather than specific values. Hypothesis then generates hundreds of examples, finds failures, and shrinks them to the minimal
Test Automation
Unleash is an open-source feature flag management platform. It supports feature toggles with complex activation strategies (gradual rollout, user targeting, environment-based). Testing with Unleash requires either mocking the client or using the in-process client for integration tests. SDK Setup # Node.js npm install unleash-client # Python pip
Test Automation
Video streaming applications involve multiple components: transcoding pipelines, manifest generation, CDN delivery, and player integration.
Test Automation
Statsig provides feature gates, dynamic configs, and A/B experiments. Its JavaScript SDK can be mocked or configured with local overrides for testing, though the approach differs slightly from GrowthBook due to Statsig's SDK design. SDK Setup npm install statsig-node # Node.js server npm install statsig-js
Test Automation
SMTP testing validates that your application correctly constructs and sends emails through an SMTP server.