Test automation
Playwright
Browser automation with waiting built into every action.
Playwright in practice
A browser automation library from Microsoft that drives Chromium, Firefox and WebKit through one API. Its defining decision is that every action waits for the element to be actionable before it runs, which removes the failure mode that dominates older tools: the test that passes on a developer machine and fails in a pipeline because the page was a fraction of a second behind. It arrives as a complete kit rather than a driver, with a test runner, parallel workers, isolated browser contexts and a trace viewer that replays a failed run step by step.
It is our default for a new web suite, usually written in TypeScript. Isolated contexts let one run exercise signed-in and anonymous journeys side by side without logging in and out between them, and a session captured once during setup keeps authentication out of every individual spec. Request interception stubs the third-party calls that have no business deciding whether a checkout test goes green. When a run fails overnight in a pipeline nobody was watching, the recorded trace is what turns a screenshot into an explanation, and that is what keeps a team believing the suite.
WebKit is not Safari. The engine here is a build Playwright ships, so a defect that appears only in the browser Apple distributes, on the hardware a customer is actually holding, can pass in your suite and fail in the world.
Native mobile applications are outside its reach entirely. Anything installed from a store needs a different automation stack, real devices to run on, and a budget that reflects both.
The JavaScript and TypeScript bindings lead the others. Ports for Python, Java and .NET are real and maintained, and a team standing on one of them should read release notes rather than assume feature parity.
Generous auto-waiting can disguise a genuinely fragile suite. Timing problems that another tool would have surfaced during development instead surface later, when a pipeline runs on a slower machine or under load.
It has fewer accumulated years behind it than the alternatives. That sounds like a small thing until somebody junior is stuck on an obscure error at five in the afternoon and there is no answer already written.
FAQ
Playwright questions we hear often
Should we move an existing Selenium suite to Playwright?
Not on the strength of the tool by itself. Where the older suite is slow and unreliable because of brittle locators and shared fixtures, a rewrite carries both problems across and you pay for them twice. Establish what remains once the architecture is sound. The move earns its cost when the residual pain really is the driver layer, or when the suite is small enough that rebuilding beats repairing.
Can Playwright test our mobile app?
Not a native one. It will emulate a small viewport and touch input, which covers responsive web behaviour perfectly well, but an application a customer installs from a store sits outside what it can drive. That work belongs to a mobile automation stack running against real hardware, and the device estate usually costs more attention than the scripts do.
Do we need it if our API tests are already strong?
Less of it than you would expect, and that is a healthy position to be in. Anything provable one layer down belongs one layer down, where it runs faster and breaks less often. Reserve browser coverage for the few journeys where rendering, routing and state genuinely have to be exercised together. A short suite that always tells the truth outperforms a long one nobody trusts.
Does the trace viewer replace proper application logging?
No. A trace records what the browser did during a failing test, which is a different question from what your service did while it happened. When a run collapses because a downstream call timed out, the trace shows you the symptom and your own logs hold the cause. Teams that lean entirely on traces end up guessing about everything that happened server-side.
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Wondering if this is the right tool?
Describe what you are trying to verify and we will tell you which instrument fits, including when the answer is one we do not use.