import fs from 'fs/promises';
import path from 'path';
import axios from 'axios';

import { checkImageUrl, allowedFormats, requestWaitingTimeInMs } from '..';

jest.useFakeTimers();

describe('checkImageUrl', () => {
  it('should return a correct result for jpeg', async () => {
    const isAllowed = allowedFormats.includes('jpeg');

    const jpegImageBuffer = await fs.readFile(
      path.join(__dirname, './images/jpeg-test.jpeg')
    );

    const mockGet = jest.spyOn(axios, 'get');
    mockGet.mockImplementation(() =>
      Promise.resolve({ data: jpegImageBuffer })
    );

    const result = await checkImageUrl('https://tsthisisforyoudear.com/');

    expect(result).toBe(isAllowed);
  });

  it('should return a correct result for webp', async () => {
    const isAllowed = allowedFormats.includes('webp');

    const webpImageBuffer = await fs.readFile(
      path.join(__dirname, './images/webp-test.webp')
    );

    const mockGet = jest.spyOn(axios, 'get');
    mockGet.mockImplementation(() =>
      Promise.resolve({ data: webpImageBuffer })
    );

    const result = await checkImageUrl('https://tsthisisforyoudear.com/');

    expect(result).toBe(isAllowed);
  });

  it('should return null when server not responding', () => {
    const mockGet = jest.spyOn(axios, 'get');
    mockGet.mockImplementation(() => new Promise(() => {}));

    const pendingPromise = checkImageUrl(
      'https://tsthisisforyoudear.com/'
    ).then((result) => {
      expect(result).toBe(null);
    });

    jest.advanceTimersByTime(requestWaitingTimeInMs);

    return pendingPromise;
  });
});