import { describe, expect, it } from 'vitest';
import { toSvg } from '../src/lib/export-svg';

const shape = {
  outer: [{ x: 0, y: 0 }, { x: 100, y: 0 }, { x: 100, y: 50 }, { x: 0, y: 50 }],
  holes: [[{ x: 10, y: 10 }, { x: 20, y: 10 }, { x: 20, y: 20.5 }]],
};

describe('toSvg', () => {
  it('declares its size in mm with a matching viewBox', () => {
    const svg = toSvg(shape);
    expect(svg).toContain('width="100mm"');
    expect(svg).toContain('height="50mm"');
    expect(svg).toContain('viewBox="0 0 100 50"');
  });

  it('writes one closed subpath per ring in a single evenodd path', () => {
    const svg = toSvg(shape);
    const d = svg.match(/ d="([^"]+)"/)![1];
    expect(d.match(/M/g)).toHaveLength(2);
    expect(d.match(/Z/g)).toHaveLength(2);
    expect(d).toContain('M0,0 L100,0 L100,50 L0,50 Z');
    expect(d).toContain('20,20.5');
    expect(svg).toContain('fill-rule="evenodd"');
    expect(svg).toContain('fill="none"');
  });
});