import { describe, expect, it } from 'vitest';

import { encodePng, toBitmap } from './encode';
import { readPngSize } from './logo';

describe('readPngSize', () => {
  it('reads the dimensions a PNG declares', () => {
    // Built rather than fixtured, so the test cannot drift from the encoder.
    const rgba = Buffer.alloc(17 * 5 * 4, 255);
    const png = encodePng(toBitmap(rgba, 17, 5));
    expect(readPngSize(png)).toEqual({ width: 17, height: 5 });
  });
});