Playwright Test Command

<command_purpose>Run end-to-end browser tests on pages affected by a PR or branch changes using Playwright MCP.</command_purpose>

Introduction

<role>QA Engineer specializing in browser-based end-to-end testing</role>

This command tests affected pages in a real browser, catching issues that unit tests miss:

• JavaScript integration bugs
• CSS/layout regressions
• User workflow breakages
• Console errors

Prerequisites

<requirements> - Local development server running (e.g., `bin/dev`, `rails server`) - Playwright MCP server connected - Git repository with changes to test </requirements>

Main Tasks

1. Determine Test Scope

<test_target> $ARGUMENTS </test_target>

<determine_scope>

If PR number provided:

gh pr view [number] --json files -q '.files[].path'

If 'current' or empty:

git diff --name-only main...HEAD

If branch name provided:

git diff --name-only main...[branch]

</determine_scope>

2. Map Files to Routes

<file_to_route_mapping>

Map changed files to testable routes:

File Pattern	Route(s)
app/views/users/*	/users, /users/:id, /users/new
app/controllers/settings_controller.rb	/settings
app/javascript/controllers/*_controller.js	Pages using that Stimulus controller
app/components/*_component.rb	Pages rendering that component
app/views/layouts/*	All pages (test homepage at minimum)
app/assets/stylesheets/*	Visual regression on key pages
app/helpers/*_helper.rb	Pages using that helper

Build a list of URLs to test based on the mapping.

</file_to_route_mapping>

3. Verify Server is Running

<check_server>

Before testing, verify the local server is accessible:

mcp__playwright__browser_navigate({ url: "http://localhost:3000" })
mcp__playwright__browser_snapshot({})

If server is not running, inform user:

**Server not running**

Please start your development server:
- Rails: `bin/dev` or `rails server`
- Node: `npm run dev`

Then run `/playwright-test` again.

</check_server>

4. Test Each Affected Page

<test_pages>

For each affected route:

Step 1: Navigate and capture snapshot

mcp__playwright__browser_navigate({ url: "http://localhost:3000/[route]" })
mcp__playwright__browser_snapshot({})

Step 2: Check for errors

mcp__playwright__browser_console_messages({ level: "error" })

Step 3: Verify key elements

• Page title/heading present
• Primary content rendered
• No error messages visible
• Forms have expected fields

Step 4: Test critical interactions (if applicable)

mcp__playwright__browser_click({ element: "[description]", ref: "[ref]" })
mcp__playwright__browser_snapshot({})

</test_pages>

5. Human Verification (When Required)

<human_verification>

Pause for human input when testing touches:

Flow Type	What to Ask
OAuth	"Please sign in with [provider] and confirm it works"
Email	"Check your inbox for the test email and confirm receipt"
Payments	"Complete a test purchase in sandbox mode"
SMS	"Verify you received the SMS code"
External APIs	"Confirm the [service] integration is working"

Use AskUserQuestion:

**Human Verification Needed**

This test touches the [flow type]. Please:
1. [Action to take]
2. [What to verify]

Did it work correctly?
1. Yes - continue testing
2. No - describe the issue

</human_verification>

6. Handle Failures

<failure_handling>

When a test fails:

1. Document the failure:

   • Screenshot the error state
   • Capture console errors
   • Note the exact reproduction steps

2. Ask user how to proceed:

   **Test Failed: [route]**
   
   Issue: [description]
   Console errors: [if any]
   
   How to proceed?
   1. Fix now - I'll help debug and fix
   2. Create todo - Add to todos/ for later
   3. Skip - Continue testing other pages
   

3. If "Fix now":

   • Investigate the issue
   • Propose a fix
   • Apply fix
   • Re-run the failing test

4. If "Create todo":

   • Create {id}-pending-p1-playwright-{description}.md
   • Continue testing

5. If "Skip":

   • Log as skipped
   • Continue testing

</failure_handling>

7. Test Summary

<test_summary>

After all tests complete, present summary:

## 🎭 Playwright Test Results

**Test Scope:** PR #[number] / [branch name]
**Server:** http://localhost:3000

### Pages Tested: [count]

| Route | Status | Notes |
|-------|--------|-------|
| `/users` | ✅ Pass | |
| `/settings` | ✅ Pass | |
| `/dashboard` | ❌ Fail | Console error: [msg] |
| `/checkout` | ⏭️ Skip | Requires payment credentials |

### Console Errors: [count]
- [List any errors found]

### Human Verifications: [count]
- OAuth flow: ✅ Confirmed
- Email delivery: ✅ Confirmed

### Failures: [count]
- `/dashboard` - [issue description]

### Created Todos: [count]
- `005-pending-p1-playwright-dashboard-error.md`

### Result: [PASS / FAIL / PARTIAL]

</test_summary>

Quick Usage Examples

# Test current branch changes
/playwright-test

# Test specific PR
/playwright-test 847

# Test specific branch
/playwright-test feature/new-dashboard