webapp-testing

Automate browser testing of local web applications using Python Playwright scripts.

2|Updated Jul 11, 2026
One-click install
npx skills add https://github.com/MoofonLi/dev-ready --skill webapp-testing-moofonli
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: webapp-testing
Source: https://github.com/MoofonLi/dev-ready/tree/main/src/dev_ready/templates/claude/skills/webapp-testing
Command: npx skills add https://github.com/MoofonLi/dev-ready --skill webapp-testing-moofonli

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires playwright, and includes scripts (resource) components.

What problem does it solve? Testing local web applications manually is slow and error-prone, especially when verifying frontend behavior, debugging UI issues, or capturing browser state. This Skill provides a structured Playwright-based workflow for interacting with and validating web apps programmatically. ## Core Features & Use Cases - Server Lifecycle Management: The with_server.py helper starts one or more servers (e.g., backend plus frontend), waits for readiness, runs your automation, and cleans up afterward. - Reconnaissance-Then-Action Pattern: Inspect the rendered DOM after networkidle, identify selectors, then execute actions against dynamic JavaScript-driven pages. - Example Scripts: Ready-made patterns for element discovery, static HTML automation via file:// URLs, and console log capture. - Use Case: You have a React frontend on port 5173 and a FastAPI backend on port 3000. Use the helper to launch both, then run a Playwright script that logs in, clicks through the dashboard, and screenshots the result for verification. ## Quick Start Ask the agent to test the local web app by starting the dev server with the with_server.py helper and writing a Playwright script that navigates to the page, waits for networkidle, and captures a screenshot.

Frequently Asked Questions about webapp-testing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I test a local web application with Playwright in Python?

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

How do I run Playwright tests that need both a backend and frontend server?

Pass multiple --server and --port pairs to with_server.py, one per server. It starts each server, waits for its port to accept connections, runs your automation command, then terminates all servers cleanly.

Why does Playwright find no elements on my dynamic web page?

Dynamic apps render content via JavaScript after the initial page load, so inspecting the DOM too early returns nothing. Call page.wait_for_load_state('networkidle') before querying selectors or taking screenshots.

Can Playwright automate static HTML files without a server?

Yes, navigate to a file:// URL pointing at the absolute path of the HTML file. You can then click elements, fill forms, and capture screenshots exactly as with a served page.

How do I capture browser console logs during Playwright automation?

Register a handler with page.on('console', handler) before navigating. Each console message is passed to your callback, where you can print or save the message type and text to a log file.