import { describe, it, expect } from 'vitest';
import {
  sortNumEngZhtw,
  sortNumEngZhtwForFilter,
} from '@/module/sortNumEngZhtw.js';

describe('sortNumEngZhtw', () => {
  it('sorts numbers in ascending order', () => {
    expect(sortNumEngZhtw(['3', '1', '2']))
      .toEqual(['1', '2', '3']);
  });

  it('places numbers before strings', () => {
    expect(sortNumEngZhtw(['b', '1', 'a']))
      .toEqual(['1', 'a', 'b']);
  });

  it('sorts English strings alphabetically', () => {
    expect(sortNumEngZhtw(['cherry', 'apple', 'banana']))
      .toEqual(['apple', 'banana', 'cherry']);
  });

  it('sorts mixed numbers and strings', () => {
    const input = ['banana', '10', 'apple', '2'];
    const result = sortNumEngZhtw(input);
    expect(result).toEqual(['2', '10', 'apple', 'banana']);
  });
});

describe('sortNumEngZhtwForFilter', () => {
  it('returns negative when a < b (numbers)', () => {
    expect(sortNumEngZhtwForFilter('1', '2'))
      .toBeLessThan(0);
  });

  it('returns positive when a > b (numbers)', () => {
    expect(sortNumEngZhtwForFilter('10', '2'))
      .toBeGreaterThan(0);
  });

  it('places numbers before strings', () => {
    expect(sortNumEngZhtwForFilter('1', 'a'))
      .toBeLessThan(0);
    expect(sortNumEngZhtwForFilter('a', '1'))
      .toBeGreaterThan(0);
  });

  it('compares strings using locale', () => {
    expect(sortNumEngZhtwForFilter('a', 'b'))
      .toBeLessThan(0);
  });
});