Playwright tutorial: a practical learning sequence

Run a practical lab

1. Prepare your environment

Follow the official installation guide for current Node.js and operating-system requirements. Use a separate practice project, select TypeScript or JavaScript and run the generated example before adding application tests.

2. Describe the behaviour

For checkout, state the starting cart, action and expected total. Include an error case such as a required field left empty. A passing click alone does not establish that an order was created correctly.

3. Locate, act and assert

Prefer locators based on user-facing roles and labels where appropriate. Web-first assertions retry while waiting for the expected state. Avoid substituting arbitrary delays for a clear check of the result.

4. Control setup and investigate failures

Fixtures can provide setup and cleanup. Keep tests independent and give each scenario predictable data. When a run fails, inspect the trace and application behaviour before deciding whether the test or product needs correction.

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