Eh Test

What I do

I automate the complete testing workflow for eHunter userscript on the EH platform:

1. Build Production Bundle - Run npm run build-prod and verify success
2. Open Test Page - Navigate to exhentai.org test gallery using chrome-devtools-mcp
3. Wait for Injection - Wait 3 seconds for userscript initialization
4. Check Console Errors - Detect JavaScript errors using chrome-devtools-mcp_list_console_messages
5. Verify DOM Mounting - Check if ehunter-app element exists using chrome-devtools-mcp_take_snapshot
6. Run Functional Tests - Execute platform-specific feature tests

When to use me

Use this skill when:

• You need to verify eHunter works correctly on exhentai.org after code changes
• You want to run a complete E2E test before releasing
• You need to debug production build issues
• You want to validate DOM injection and console errors

Prerequisites

Before running this skill, ensure:

• Development server is NOT running (conflicts with production build)
• Chrome DevTools MCP is available and configured
• Tampermonkey is installed and configured in the test browser
• eHunter userscript is already installed in Tampermonkey with dynamic loading enabled
• You have valid exhentai.org cookies for authentication
• Production build configuration (vite.config.prod.ts) is valid

Important - Dynamic Script Loading: The Tampermonkey script is configured to dynamically load dist/ehunter.iife.js from the local build output. This means:

• After running npm run build-prod, simply refresh the image page to see changes
• No manual script copying or Tampermonkey updates needed
• The script only loads on image pages (URLs matching /s/ pattern like https://exhentai.org/s/80813c92df/3482416-1)
• Gallery list pages (/g/ URLs) will NOT trigger the script injection

Test Flow

Step 0: Verify Tampermonkey Setup (Optional)

Before running the full test, you can verify Tampermonkey is properly configured:

Using chrome-devtools-mcp_evaluate_script:

() => {
  return {
    hasTampermonkey: typeof GM_info !== 'undefined',
    tampermonkeyVersion: typeof GM_info !== 'undefined' ? GM_info.version : null,
    scriptsRunning: typeof GM_info !== 'undefined' ? GM_info.scriptHandler : null
  }
}

Expected Result: hasTampermonkey: true indicates Tampermonkey is active.

Step 1: Build Production Bundle

npm run build-prod

I will:

• Execute the build command
• Check exit code is 0
• Verify dist/ehunter.iife.js exists and has content
• STOP immediately if build fails and report errors

Note: The Tampermonkey script will automatically load this file on the next page refresh.

Step 2: Navigate to Image Page

I will use chrome-devtools-mcp to:

• Navigate to the test image page: https://exhentai.org/s/80813c92df/3482416-1
• Important: Must use a /s/ URL (image page), NOT /g/ URL (gallery list page)
• Wait for page load completion
• Handle authentication dialogs if needed

Why image page? The Tampermonkey script only injects on image pages where the reader UI is displayed. Gallery list pages (/g/ URLs) will not trigger the script.

Step 3: Refresh Page to Load New Build

After building, I will:

• Reload the gallery page using chrome-devtools-mcp_navigate_page with type: "reload" and ignoreCache: true
• This triggers Tampermonkey to load the latest dist/ehunter.iife.js
• Wait 3 seconds for script injection and initialization

What happens during injection:

• Tampermonkey detects the gallery page URL pattern
• Loads dist/ehunter.iife.js dynamically
• eHunter initializes and mounts the #ehunter-app element
• Console logs show initialization progress

Important: After waiting, console logs may not appear immediately in the current navigation context. Use includePreservedMessages: true when calling chrome-devtools-mcp_list_console_messages to retrieve logs across recent navigations.

Step 4: Console Error Detection

Using chrome-devtools-mcp_list_console_messages:

• IMPORTANT: Always use includePreservedMessages: true parameter to retrieve logs across recent navigations
• Filter for types: ["error"] to find errors
• Also check for types: ["log", "info"] to verify eHunter initialization
• Report any error messages found
• Categorize errors:
  • eHunter script errors (critical)
  • Page errors (informational)
  • Third-party errors (informational)

Example Usage:

chrome-devtools-mcp_list_console_messages({
  includePreservedMessages: true,
  types: ["log", "info", "error"]
})

Expected Console Logs:

• "eHunter: Platform detected: EH" - Platform detection successful
• "[EH Platform] initialized successfully" - Initialization complete
• Initialization metadata object with title, pageCount, albumId, curPageIndex
• If these logs are missing, the script may not have been injected or failed to initialize

Why includePreservedMessages: true is required:

• By default, list_console_messages() only returns messages from the current navigation
• eHunter logs may be printed during script injection, which could be in a previous navigation context
• Using includePreservedMessages: true retrieves logs across the last 3 navigations
• This ensures you capture all initialization logs even if they occurred before the current navigation state

Step 5: DOM Mounting Check

Using chrome-devtools-mcp_take_snapshot:

• Search for element with id="ehunter-app"
• Verify the element exists and is visible
• Check if element has child nodes (not empty)
• Report mounting failure if not found

Expected Behavior: Since Tampermonkey is pre-configured, the ehunter-app element should be present in the DOM with child elements rendered by Vue. If the element is empty or missing, this indicates an initialization failure.

Step 6: Functional Testing

Execute these default test cases:

Core Functionality:

• Album metadata loaded (title, page count, current page)
• Thumbnail grid rendered with correct layout
• Reader mode can be opened (Book/Scroll mode)
• Image loading works in reader
• Navigation controls functional (prev/next page, jump to page)
• Settings panel accessible and interactive
• Cache service operational (check localStorage/GM storage)

User can specify custom tests via arguments:

Use skill eh-test with tests: book-mode, scroll-mode, thumbnail-expand

Step 7: Test Report

I will generate a structured report:

## eHunter EH Platform Test Report

**Timestamp:** [ISO 8601 timestamp]
**Test URL:** https://exhentai.org/g/3482416/a3e66d7d79/

### Build Status
✅ Success / ❌ Failed
[Build output summary]

### Page Load
✅ Success / ❌ Failed / ⚠️ Timeout
[Load time, status code]

### Console Errors
Found X errors:
- [Error 1 details]
- [Error 2 details]

### DOM Mounting
✅ Mounted / ❌ Not Found
Element ID: ehunter-app
Children count: X

### Functional Tests
Passed: X/Y

- ✅ Album metadata loaded
- ✅ Thumbnail grid rendered
- ❌ Reader mode failed to open
- ...

### Screenshots
[Attach relevant screenshots at key steps]

### Recommendations
[Actionable suggestions based on failures]

Error Handling

Usage Examples

Basic test with default gallery

Use skill eh-test

Test with custom gallery URL

Use skill eh-test with url: https://exhentai.org/g/1234567/abcdef1234/

Test specific features only

Use skill eh-test with tests: reader-open, image-load, settings-panel

Skip functional tests (build + injection only)

Use skill eh-test with mode: quick

Notes

• This skill follows testing requirements in AGENTS.md
• Always runs production build (no dev server)
• Tampermonkey is pre-configured - userscript auto-loads on page navigation
• Wait time may need adjustment based on network conditions
• Some tests require specific gallery features (e.g., multi-page albums)
• Screenshots are taken at key steps for visual verification
• Test results are saved to .opencode/test-reports/eh-test-[timestamp].md

Troubleshooting

Build fails with TypeScript errors:

• Run npm run type-check first to identify issues
• Check tsconfig.json and vite.config.prod.ts

Tampermonkey script auto-updates:

• The script dynamically loads dist/ehunter.iife.js on each page load
• After running npm run build-prod, simply refresh the gallery page
• No manual copying or Tampermonkey editing required
• Changes take effect immediately on next page load

Script only loads on image pages:

• Image URLs: https://exhentai.org/s/[token]/[id]-[page] ✅
• Gallery list URLs: https://exhentai.org/g/[id]/[token]/ ❌
• Always test on image pages to see the reader UI and thumbnail view

Page shows "Sad Panda" (403 error):

• Exhentai requires valid cookies
• User needs to log in to e-hentai.org first
• Check browser cookie storage

DOM element not found:

• First, verify you're on an image page (/s/ URL, not /g/ URL)
• Check console for eHunter initialization logs
• Verify Tampermonkey is enabled in the test browser
• Check if dist/ehunter.iife.js exists and was built successfully
• Increase wait time if network is slow
• Check for JavaScript errors that may have prevented initialization

Console shows "GM_ is not defined":*

• Tampermonkey not properly configured in test browser
• Script may be running in wrong context
• Check @grant directives in script header
• Verify the userscript is installed in Tampermonkey (not just the browser)

Cannot see console logs / logs appear empty:

• Always use includePreservedMessages: true when calling chrome-devtools-mcp_list_console_messages
• Default behavior only shows logs from current navigation, missing initialization logs
• eHunter logs are printed during script injection and may be in a previous navigation context
• Example: chrome-devtools-mcp_list_console_messages({ includePreservedMessages: true })
• Wait at least 3 seconds after navigation before checking console logs