API Endpoint Testing Verification Guide

Overview

This document provides comprehensive testing verification for the centralized error handling middleware implementation. All 94+ route handlers have been migrated from try-catch blocks to the new asyncHandler + ApiError pattern.

Testing Environment Setup

Start the development server:

npm run dev
# Server should start on port 3000 (or PORT env variable)

Verify server starts without errors:
- Check console for successful startup message
- Ensure no error stack traces during initialization
- Confirm database migrations run successfully

Test Categories

1. Error Handling Test Routes (Development Only)

These routes were added to verify the error middleware works correctly.

Endpoint	Method	Expected Status	Expected Response
`/api/test/error/validation`	GET	400	`{"message": "Validation failed", "errors": [...]}`
`/api/test/error/unauthorized`	GET	401	`{"message": "Authentication required"}`
`/api/test/error/forbidden`	GET	403	`{"message": "Insufficient permissions"}`
`/api/test/error/notfound`	GET	404	`{"message": "Resource not found"}`
`/api/test/error/server`	GET	500	`{"message": "Internal server error", "stack": "..."}` (dev only)
`/api/test/error/generic`	GET	500	`{"message": "Something went wrong"}`
`/api/test/error/async`	GET	500	`{"message": "Async operation failed"}`
`/api/test/error/success`	GET	200	`{"message": "Success!"}`

Test Commands:

# Test ValidationError (400)
curl http://localhost:3000/api/test/error/validation

# Test UnauthorizedError (401)
curl http://localhost:3000/api/test/error/unauthorized

# Test ForbiddenError (403)
curl http://localhost:3000/api/test/error/forbidden

# Test NotFoundError (404)
curl http://localhost:3000/api/test/error/notfound

# Test InternalServerError (500)
curl http://localhost:3000/api/test/error/server

# Test Generic Error (500)
curl http://localhost:3000/api/test/error/generic

# Test Async Error (500)
curl http://localhost:3000/api/test/error/async

# Test Success (200)
curl http://localhost:3000/api/test/error/success

Verification Checklist:

All error responses return JSON with message field
ValidationError includes errors array with detailed validation failures
Stack traces appear in development mode for 500 errors
Status codes match the error type
No console errors or unhandled promise rejections

2. Authentication Endpoints

Endpoint	Method	Auth Required	Expected Behavior
`/api/auth/user`	GET	Yes	Returns user info or 401 if not authenticated
`/api/auth/logout`	POST	Yes	Logs out user or 401 if not authenticated

Test Commands:

# Without authentication - should return 401
curl http://localhost:3000/api/auth/user

# With valid session - should return user object
curl -H "Cookie: session=..." http://localhost:3000/api/auth/user

Verification Checklist:

Unauthenticated requests return 401 with {"message": "..."}
Error response is consistent JSON format
No stack traces in error responses (client errors)

3. Resource CRUD Operations

Endpoint	Method	Auth Required	Expected Behavior
`/api/resources`	GET	No	Returns list of resources (200)
`/api/resources/:id`	GET	No	Returns single resource or 404
`/api/resources`	POST	Yes	Creates resource or 401/400
`/api/resources/:id`	PUT	Yes (Admin)	Updates resource or 401/403/404
`/api/resources/:id`	DELETE	Yes (Admin)	Deletes resource or 401/403/404
`/api/resources/pending`	GET	Yes (Admin)	Returns pending resources or 401/403
`/api/resources/:id/approve`	PUT	Yes (Admin)	Approves resource or 401/403/404
`/api/resources/:id/reject`	PUT	Yes (Admin)	Rejects resource or 401/403/404

Test Commands:

# Get all resources (public)
curl http://localhost:3000/api/resources

# Get specific resource (public)
curl http://localhost:3000/api/resources/1

# Get non-existent resource - should return 404
curl http://localhost:3000/api/resources/99999

# Create resource without auth - should return 401
curl -X POST http://localhost:3000/api/resources \
  -H "Content-Type: application/json" \
  -d '{"title": "Test"}'

# Create resource with invalid data - should return 400
curl -X POST http://localhost:3000/api/resources \
  -H "Content-Type: application/json" \
  -H "Cookie: session=..." \
  -d '{"invalid": "data"}'

Verification Checklist:

GET requests work without authentication
POST/PUT/DELETE require authentication (401 if not authenticated)
Admin endpoints return 403 if not admin
Non-existent resources return 404 with JSON error
Invalid input returns 400 with validation errors
All error responses have consistent JSON format

4. Category Endpoints

Endpoint	Method	Expected Behavior
`/api/categories`	GET	Returns all categories (200)
`/api/subcategories`	GET	Returns all subcategories (200)
`/api/sub-subcategories`	GET	Returns all sub-subcategories (200)

Test Commands:

# Get categories
curl http://localhost:3000/api/categories

# Get subcategories
curl http://localhost:3000/api/subcategories

# Get sub-subcategories
curl http://localhost:3000/api/sub-subcategories

Verification Checklist:

All endpoints return 200 with JSON arrays
No authentication required
Responses are properly formatted

5. User Favorites and Bookmarks

Endpoint	Method	Auth Required	Expected Behavior
`/api/favorites`	GET	Yes	Returns user's favorites or 401
`/api/favorites/:resourceId`	POST	Yes	Adds favorite or 401/404
`/api/favorites/:resourceId`	DELETE	Yes	Removes favorite or 401/404
`/api/bookmarks`	GET	Yes	Returns user's bookmarks or 401
`/api/bookmarks/:resourceId`	POST	Yes	Adds bookmark or 401/404
`/api/bookmarks/:resourceId`	DELETE	Yes	Removes bookmark or 401/404

Test Commands:

# Get favorites without auth - should return 401
curl http://localhost:3000/api/favorites

# Get bookmarks without auth - should return 401
curl http://localhost:3000/api/bookmarks

# Add favorite to non-existent resource - should return 404
curl -X POST http://localhost:3000/api/favorites/99999 \
  -H "Cookie: session=..."

Verification Checklist:

All endpoints require authentication (401 if not authenticated)
Non-existent resources return 404
All error responses have consistent JSON format

6. Admin Operations

Endpoint	Method	Auth Required	Expected Behavior
`/api/admin/stats`	GET	Admin	Returns stats or 401/403
`/api/admin/users`	GET	Admin	Returns users or 401/403
`/api/admin/categories`	POST/PUT/DELETE	Admin	CRUD operations or 401/403

Test Commands:

# Access admin stats without auth - should return 401
curl http://localhost:3000/api/admin/stats

# Access admin stats as non-admin - should return 403
curl -H "Cookie: session=..." http://localhost:3000/api/admin/stats

Verification Checklist:

All admin endpoints require authentication (401)
Non-admin users receive 403 Forbidden
All error responses have consistent JSON format

7. SEO and Public Endpoints

Endpoint	Method	Expected Behavior
`/sitemap.xml`	GET	Returns XML sitemap (200)
`/og-image.svg`	GET	Returns SVG image (200)

Test Commands:

# Get sitemap
curl http://localhost:3000/sitemap.xml

# Get OG image
curl http://localhost:3000/og-image.svg

Verification Checklist:

Both endpoints return 200
Sitemap returns valid XML
OG image returns valid SVG
No authentication required

8. GitHub and Discovery Endpoints

Endpoint	Method	Expected Behavior
`/api/github/awesome-lists`	GET	Returns awesome lists (200)
`/api/github/search`	GET	Returns search results (200)
`/api/awesome-list`	GET	Returns current list (200)

Test Commands:

# Discover awesome lists
curl http://localhost:3000/api/github/awesome-lists

# Search GitHub
curl "http://localhost:3000/api/github/search?q=javascript"

# Get current awesome list
curl http://localhost:3000/api/awesome-list

Verification Checklist:

All endpoints return 200
No authentication required for discovery
Responses are properly formatted JSON

9. Learning Paths and Recommendations

Endpoint	Method	Auth Required	Expected Behavior
`/api/recommendations`	GET	Optional	Returns recommendations
`/api/recommendations/init`	GET	No	Initializes recommendation engine
`/api/learning-paths/suggested`	GET	Yes	Returns suggested paths or 401
`/api/learning-paths/generate`	POST	Yes	Generates custom path or 401/400

Test Commands:

# Get recommendations (public)
curl http://localhost:3000/api/recommendations

# Get suggested learning paths without auth - should return 401
curl http://localhost:3000/api/learning-paths/suggested

Verification Checklist:

Public endpoints work without auth
Protected endpoints return 401 if not authenticated
Invalid input returns 400 with validation errors

10. User Progress and Submissions

Endpoint	Method	Auth Required	Expected Behavior
`/api/user/progress`	GET	Yes	Returns user progress or 401
`/api/user/submissions`	GET	Yes	Returns user submissions or 401

Test Commands:

# Get user progress without auth - should return 401
curl http://localhost:3000/api/user/progress

# Get user submissions without auth - should return 401
curl http://localhost:3000/api/user/submissions

Verification Checklist:

Both endpoints require authentication
Unauthenticated requests return 401
Error responses have consistent JSON format

11. Non-existent Routes (404 Handling)

Test Commands:

# Test non-existent API route
curl http://localhost:3000/api/nonexistent/route

# Test non-existent nested route
curl http://localhost:3000/api/foo/bar/baz

Verification Checklist:

Non-existent routes return 404
Error response is JSON: {"message": "..."}
No stack traces for 404 errors

Error Response Format Verification

All error responses should follow this consistent format:

Client Errors (400-499):

{
  "message": "Human-readable error message"
}

Validation Errors (400):

{
  "message": "Validation failed",
  "errors": [
    {
      "path": ["field", "name"],
      "message": "Field-specific error message"
    }
  ]
}

Server Errors (500+) - Development Mode:

{
  "message": "Internal server error",
  "stack": "Error stack trace..."
}

Server Errors (500+) - Production Mode:

{
  "message": "Internal server error"
}

Global Verification Checklist

Error Handling:

All error responses are valid JSON
All error responses include a message field
Validation errors include an errors array with details
Stack traces only appear in development mode (500 errors)
Stack traces DO NOT appear in production mode
Client errors (400-499) use appropriate status codes
Server errors (500+) use appropriate status codes

Status Codes:

200 - Successful GET requests
201 - Successful POST requests (resource creation)
400 - Validation errors (invalid input)
401 - Authentication required (not logged in)
403 - Forbidden (insufficient permissions)
404 - Resource not found
409 - Conflict (duplicate resources)
500 - Internal server errors

Console Output:

No unhandled promise rejections
No uncaught exceptions
Server errors (500+) are logged to console.error
Client errors (400-499) are not logged (or only in dev mode)
Request logging shows correct status codes

Code Quality:

All route handlers use asyncHandler wrapper
No manual try-catch blocks in route handlers (except intentional nested cases)
All error responses throw ApiError subclasses
No direct calls to res.status().json() for errors in migrated routes
Imports for asyncHandler and error classes are present

Summary

This comprehensive testing verification ensures:

Consistent Error Handling: All API endpoints return errors in the same JSON format
Appropriate Status Codes: Each error type uses the correct HTTP status code
Security: Stack traces are hidden in production mode
Developer Experience: Helpful error messages and validation details
Code Quality: All routes use the centralized error handling system

Test Execution

To execute these tests:

Start the development server: npm run dev
Run through each test category systematically
Verify each endpoint returns the expected status code
Verify each error response has the correct JSON format
Check console for any errors or warnings
Test both authenticated and unauthenticated scenarios
Test both valid and invalid input scenarios

Expected Outcome

✅ All API endpoints return responses (no crashes or hangs) ✅ Error responses are consistent JSON with message field ✅ 404 errors for non-existent resources ✅ 401 errors for unauthenticated requests ✅ 403 errors for unauthorized access ✅ 400 errors for validation failures with error details ✅ 500 errors for server errors (with stack in dev mode only) ✅ No console errors or unhandled promise rejections

Notes

Test error routes (/api/test/error/*) will be removed after verification (subtask 4-2)
The testing should be performed in both development and production modes
Production mode testing should verify that stack traces are not exposed
All tests should be re-run after removing test routes to ensure no regression

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API Endpoint Testing Verification Guide

Overview

Testing Environment Setup

Test Categories

1. Error Handling Test Routes (Development Only)

2. Authentication Endpoints

3. Resource CRUD Operations

4. Category Endpoints

5. User Favorites and Bookmarks

6. Admin Operations

7. SEO and Public Endpoints

8. GitHub and Discovery Endpoints

9. Learning Paths and Recommendations

10. User Progress and Submissions

11. Non-existent Routes (404 Handling)

Error Response Format Verification

Client Errors (400-499):

Validation Errors (400):

Server Errors (500+) - Development Mode:

Server Errors (500+) - Production Mode:

Global Verification Checklist

Error Handling:

Status Codes:

Console Output:

Code Quality:

Summary

Test Execution

Expected Outcome

Notes

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API Endpoint Testing Verification Guide

Overview

Testing Environment Setup

Test Categories

1. Error Handling Test Routes (Development Only)

2. Authentication Endpoints

3. Resource CRUD Operations

4. Category Endpoints

5. User Favorites and Bookmarks

6. Admin Operations

7. SEO and Public Endpoints

8. GitHub and Discovery Endpoints

9. Learning Paths and Recommendations

10. User Progress and Submissions

11. Non-existent Routes (404 Handling)

Error Response Format Verification

Client Errors (400-499):

Validation Errors (400):

Server Errors (500+) - Development Mode:

Server Errors (500+) - Production Mode:

Global Verification Checklist

Error Handling:

Status Codes:

Console Output:

Code Quality:

Summary

Test Execution

Expected Outcome

Notes