import { expect } from 'chai';
import { afterEach, beforeEach, describe, it } from 'mocha';
import sinon from 'sinon';
import { urlToBase64 } from '../src/urlToBase64.js';

describe('urlToBase64.ts', () => {
  let fetchStub: sinon.SinonStub;

  beforeEach(() => {
    fetchStub = sinon.stub(globalThis, 'fetch');
  });

  afterEach(() => {
    sinon.restore();
  });

  describe('urlToBase64 function', () => {
    it('Will convert a png image to base64', async () => {
      const mockArrayBuffer = new ArrayBuffer(8);

      fetchStub.resolves({
        arrayBuffer: () => Promise.resolve(mockArrayBuffer),
      });

      const url = await urlToBase64('https://example.com/image.png');

      expect(url).equal('data:image/png;base64,AAAAAAAAAAA=');
    });
  });
});