@bernierllc/content-type-blog-post/__tests__/slug.test.ts

Blog post content type with rich TipTap editor, SEO metadata, database storage, and web publishing

/*
Copyright (c) 2025 Bernier LLC

This file is licensed to the client under a limited-use license.
The client may use and modify this code *only within the scope of the project it was delivered for*.
Redistribution or use in other products or commercial offerings is not permitted without written consent from Bernier LLC.
*/

import { isValidSlug, generateSlugFromTitle, ensureUniqueSlug } from '../src/slug';

describe('slug', () => {
  describe('isValidSlug', () => {
    it('should accept valid slugs', () => {
      expect(isValidSlug('test-slug')).toBe(true);
      expect(isValidSlug('test-slug-123')).toBe(true);
      expect(isValidSlug('slug')).toBe(true);
      expect(isValidSlug('123')).toBe(true);
    });

    it('should reject invalid slugs', () => {
      expect(isValidSlug('Test-Slug')).toBe(false); // uppercase
      expect(isValidSlug('test_slug')).toBe(false); // underscore
      expect(isValidSlug('test slug')).toBe(false); // space
      expect(isValidSlug('test@slug')).toBe(false); // special char
      expect(isValidSlug('')).toBe(false); // empty
    });
  });

  describe('generateSlugFromTitle', () => {
    it('should convert title to slug', () => {
      expect(generateSlugFromTitle('Test Blog Post')).toBe('test-blog-post');
    });

    it('should handle special characters', () => {
      expect(generateSlugFromTitle('Test! Blog? Post.')).toBe('test-blog-post');
    });

    it('should handle multiple spaces', () => {
      expect(generateSlugFromTitle('Test    Blog    Post')).toBe('test-blog-post');
    });

    it('should trim hyphens from start and end', () => {
      expect(generateSlugFromTitle('  Test Blog Post  ')).toBe('test-blog-post');
    });

    it('should handle unicode characters', () => {
      expect(generateSlugFromTitle('Test Blög Pøst')).toBe('test-blg-pst');
    });

    it('should handle empty title', () => {
      expect(generateSlugFromTitle('')).toBe('');
    });

    it('should replace multiple hyphens with single hyphen', () => {
      expect(generateSlugFromTitle('Test---Blog---Post')).toBe('test-blog-post');
    });
  });

  describe('ensureUniqueSlug', () => {
    it('should return original slug if unique', () => {
      const slug = 'test-post';
      const existing = ['other-post', 'another-post'];
      expect(ensureUniqueSlug(slug, existing)).toBe('test-post');
    });

    it('should append -1 if slug exists', () => {
      const slug = 'test-post';
      const existing = ['test-post'];
      expect(ensureUniqueSlug(slug, existing)).toBe('test-post-1');
    });

    it('should increment counter for multiple conflicts', () => {
      const slug = 'test-post';
      const existing = ['test-post', 'test-post-1', 'test-post-2'];
      expect(ensureUniqueSlug(slug, existing)).toBe('test-post-3');
    });

    it('should handle empty existing slugs array', () => {
      const slug = 'test-post';
      expect(ensureUniqueSlug(slug, [])).toBe('test-post');
    });

    it('should find first available number in sequence', () => {
      const slug = 'test-post';
      const existing = ['test-post', 'test-post-2', 'test-post-3'];
      expect(ensureUniqueSlug(slug, existing)).toBe('test-post-1');
    });
  });
});