Testing
Most browser compatibility guides tell you to test on Chrome, Firefox, Safari, and Edge. That's a reasonable starting point, but it's not a strategy. A well-designed browser test matrix is based on your actual user analytics, the CSS and JavaScript features your app depends on,
Testing
Most teams treat API testing and browser testing as separate concerns — different tools, different test suites, different CI jobs. Playwright's APIRequestContext lets you test REST APIs directly, using the same test runner, same fixtures, and same authentication setup as your UI tests. The result is a unified testing
Testing
AI chatbots fail in ways that traditional software doesn't. They misunderstand intent, lose context across turns, make up information, break character, and occasionally say things that would horrify your legal team. Testing them requires a different mental model from testing deterministic systems — you're testing behaviors under
Testing
Network calls are one of the biggest sources of flakiness in end-to-end tests. When your tests depend on real APIs, they break whenever the backend is slow, returns unexpected data, or goes down entirely. Playwright's network interception lets you take control — mock responses, simulate failures, and
Testing
A test suite that takes 45 minutes to run provides almost no value — developers stop waiting for it and ship without knowing whether tests pass. Playwright's parallel execution model can reduce that 45 minutes to under 10 by running tests concurrently across CPU cores and, with sharding, across
Testing
Visual regressions are the silent killers of web applications. A CSS change that looks fine in isolation can break the layout of a page you never manually checked. Playwright's built-in screenshot comparison (toHaveScreenshot) gives you pixel-level visual regression testing without any external service — just snapshots stored
Testing
LLMs hallucinate. They generate plausible-sounding text that is factually wrong, cite papers that don't exist, quote statistics that were never measured, and confidently describe events that never happened. If your product uses an LLM to generate content that users trust — customer support answers, medical information, legal summaries,
Testing
Authentication is one of the biggest time sinks in end-to-end test suites. If every test logs in before doing its actual work, you're spending a significant portion of your test runtime on a flow you've already validated hundreds of times. Playwright's storage
Testing
ML models degrade in ways that traditional software doesn't. Code doesn't spontaneously get worse — but a model trained on March data can silently degrade by June as the distribution of real-world inputs shifts. A retrained model can score higher on aggregate metrics while regressing on
Testing
A/B testing AI features is harder than testing traditional software. Changing a button color produces a measurable, binary outcome — users click or they don't. Changing an LLM prompt produces different text outputs, and measuring which output is "better" requires defining what better even means for
Database Testing
Xata is a serverless database platform built on PostgreSQL with a TypeScript SDK, full-text search, branch-based development workflows, and an HTTP API. Its branch feature — where every branch gets an isolated database — makes it particularly interesting for testing: you can create a branch per pull request and get
Database Testing
PocketBase is an open-source backend in a single Go binary: embedded SQLite database, realtime subscriptions, file storage, auth, and an extensible Go framework — all in one 30MB executable. It's become popular for indie projects, prototypes, and small teams who want a real backend without the operational overhead.