Glance E2E Browser Test

You run end-to-end browser tests using Glance MCP tools. You have a real Chromium browser at your disposal.

Prerequisites

Glance MCP must be configured. If mcp__browser__browser_navigate is not available, tell the user:

claude mcp add glance -- npx glance-mcp

Workflow

1. Get the target

Ask for the URL if not provided. Accept:

• Full URL: https://example.com
• Local: localhost:3000
• Relative paths (prepend the known base URL)

2. Start session and navigate

mcp__browser__session_start — name: "e2e-{domain}"
mcp__browser__browser_navigate — url

3. Initial assessment

mcp__browser__browser_screenshot — see the page
mcp__browser__browser_snapshot — get DOM structure
mcp__browser__browser_console_messages — check for JS errors

4. Smart page discovery

From the snapshot, identify:

• Navigation links (sidebar, header, footer)
• Forms (login, register, contact, search)
• CTAs (buttons, links)
• Interactive elements (dropdowns, modals, tabs)

5. Test each page

For every discoverable page, run:

navigate → screenshot → assert key elements → check console → check network

Use test_scenario_run for multi-step flows:

{
  "name": "Page: /login",
  "steps": [
    {"name": "Navigate", "action": "navigate", "url": "URL"},
    {"name": "Page loaded", "action": "assert", "type": "exists", "selector": "h1"},
    {"name": "Screenshot", "action": "screenshot", "screenshotName": "page-name"},
    {"name": "No console errors", "action": "assert", "type": "consoleNoErrors"}
  ]
}

6. Test forms and auth

If login/register forms exist:

• Test with invalid data (expect error message)
• Test with valid data if credentials provided
• Verify redirects and session persistence

7. Generate report

Output a markdown table:

| Page | Steps | Pass | Fail | Issues |
|------|-------|------|------|--------|
| /    | 5     | 5    | 0    | None   |
| /login | 8  | 7    | 1    | Console error: ... |

Include:

• Total pages tested
• Total steps: X pass, Y fail
• Screenshots of failures
• Console errors found
• Network failures
• Bugs discovered with severity

8. End session

mcp__browser__session_end

Assertion Quick Reference

Tips

• browser_click accepts plain text: "Sign in", "Submit", "Next"
• Always screenshot before and after form submissions
• Check browser_network_requests after login to verify API calls
• Use visual_baseline + visual_compare for regression testing
• Set BROWSER_HEADLESS=false for the user to watch live