markdown-converter/tests/unit/lib/cn.test.ts

import { describe, it, expect } from 'vitest';
import { cn } from '@/lib/utils';

describe('cn', () => {
  it('merges class names', () => {
    expect(cn('a', 'b')).toBe('a b');
  });

  it('deduplicates conflicting tailwind classes', () => {
    expect(cn('p-2', 'p-4')).toBe('p-4');
  });

  it('ignores falsy values', () => {
    expect(cn('a', false, null, undefined, '', 'b')).toBe('a b');
  });

  it('accepts conditional class objects', () => {
    expect(cn('base', { active: true, disabled: false })).toBe('base active');
  });
});