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tests/lib/filename.test.ts

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import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { captureFilename } from '~/lib/filename';

describe('captureFilename', () => {
  beforeEach(() => {
    vi.useFakeTimers();
    vi.setSystemTime(new Date('2026-05-23T14:07:09'));
  });

  afterEach(() => {
    vi.useRealTimers();
  });

  it('slugifies ASCII preset names', () => {
    expect(captureFilename('Forest Floor', 'png')).toBe(
      'physarum-forest-floor-20260523-140709.png',
    );
  });

  it('strips combining diacritics (Umlaute, accents)', () => {
    expect(captureFilename('Über Mündung', 'png')).toBe(
      'physarum-uber-mundung-20260523-140709.png',
    );
    expect(captureFilename('Café Noir', 'webm')).toBe('physarum-cafe-noir-20260523-140709.webm');
  });

  it('collapses runs of non-alphanumerics and trims dashes', () => {
    expect(captureFilename('!! ~~ Wild   Thing ~~ !!', 'png')).toBe(
      'physarum-wild-thing-20260523-140709.png',
    );
  });

  it('falls back to "preset" when the name slugifies to empty', () => {
    expect(captureFilename('!!!', 'png')).toBe('physarum-preset-20260523-140709.png');
    expect(captureFilename('', 'png')).toBe('physarum-preset-20260523-140709.png');
  });
});