text: const initials = require('../initials');
  
  test('returns initials', () => {
    expect(initials('TM')).toBe('TM');
  });
  
  test('returns first two letters', () => {
    expect(initials('Hello')).toBe('HE');
  });
  
  test('returns katakana as initials', () => {
    expect(initials('カタ')).toBe('KA');
  });
  
  test('returns utf8 characters', () => {
    expect(initials('汉语')).toBe('汉语');
  });
  