webapp-testing

Write a script using sync_playwright, launch Chromium in headless mode, navigate to your localhost URL, and wait for the networkidle load state before interacting. Use the with_server.py helper to start your dev server automatically before the script runs.

Use the with_server.py helper with repeated --server and --port flags for each server, followed by your automation command. It starts each server, waits for its port to accept connections, runs your command, then terminates all servers.

The script likely inspects the DOM before JavaScript finishes rendering. Call page.wait_for_load_state('networkidle') after navigation, then take a screenshot or dump page content to discover the actual rendered selectors.

Yes, navigate to a file:// URL built from the absolute path of the HTML file. You can then click elements, fill forms, and capture screenshots exactly as you would against a served page.

Register a handler with page.on('console', handler) before navigating. Each console message is passed to your callback, where you can print it or append it to a list for saving to a log file.