webapp-testinglisted

# Web Application Testing ## Prerequisites Check (MUST DO FIRST) **Before performing any testing task, you MUST check if Playwright is installed:** ```bash python -c "from playwright.sync_api import sync_playwright; print('Playwright is installed')" 2>/dev/null || echo "NOT_INSTALLED" ``` **If the output is `NOT_INSTALLED`, guide the user through installation:** 1. Ask the user: "Playwright 尚未安装。是否需要我帮你安装？" 2. If user agrees, run: ```bash pip install playwright && playwright install chromium ``` 3. Verify installation succeeded before proceeding with the original task. **Only proceed with testing tasks after confirming Playwright is available.** --- To test local web applications, write native Python Playwright scripts. **Helper Scripts Available**: - `scripts/with_server.py` - Manages server lifecycle (supports multiple servers) **Always run scripts with `--help` first** to see usage. DO NOT read the source until you try running the script first and find that a customized solution is abslutely necessary. These scripts can be very large and thus pollute your context window. They exist to be called directly as black-box scripts rather than ingested into your context window. ## Decision Tree: Choosing Your Approach ``` User task → Is it static HTML? ├─ Yes → Read HTML file directly to identify selectors │ ├─ Success → Write Playwright script using selectors │ └─ Fails/Incomplete → Treat as dynamic (below) │ └─ No (dynamic