// The Lucia project.
// Copyright 2026-2026 DSP, inc.  All rights reserved.
// Authors:
//   imacat.yang@dsp.im (imacat), 2026/03/05

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

describe('shortScaleNumber', () => {
  it('returns small numbers without abbreviation', () => {
    expect(shortScaleNumber(1).trim()).toBe('1');
    expect(shortScaleNumber(999).trim()).toBe('999');
  });

  it('abbreviates thousands as k', () => {
    expect(shortScaleNumber(1000).trim()).toBe('1k');
    expect(shortScaleNumber(1500).trim()).toBe('1.5k');
  });

  it('abbreviates millions as m', () => {
    expect(shortScaleNumber(1000000).trim()).toBe('1m');
  });

  it('abbreviates billions as b', () => {
    expect(shortScaleNumber(1000000000).trim()).toBe('1b');
  });

  it('abbreviates trillions as t', () => {
    expect(shortScaleNumber(1000000000000).trim())
      .toBe('1t');
  });

  it('rounds up using Math.ceil', () => {
    // 1234 -> 1.234k -> ceil(12.34)/10 = 1.3k
    expect(shortScaleNumber(1234).trim()).toBe('1.3k');
  });

  it('handles zero', () => {
    expect(shortScaleNumber(0).trim()).toBe('0');
  });
});