astro/packages/integrations/mdx/test/remark-imgattr.test.js

import { expect } from 'chai';
import * as cheerio from 'cheerio';
import { loadFixture } from '../../../astro/test/test-utils.js';

const FIXTURE_ROOT = new URL('./fixtures/image-remark-imgattr/', import.meta.url);

describe('Testing remark plugins for image processing', () => {
	/** @type {import('./test-utils').Fixture} */
	let fixture;

	describe('start dev server', () => {
		/** @type {import('./test-utils').DevServer} */
		let devServer;

		before(async () => {
			fixture = await loadFixture({
				root: FIXTURE_ROOT,
			});

			devServer = await fixture.startDevServer();
		});

		after(async () => {
			await devServer.stop();
		});

		describe('Test image attributes can be added by remark plugins', () => {
			let $;
			before(async () => {
				let res = await fixture.fetch('/');
				let html = await res.text();
				$ = cheerio.load(html);
			});

			it('<img> has correct attributes', async () => {
				let $img = $('img');
				expect($img.attr('id')).to.equal('test');
				expect($img.attr('sizes')).to.equal('(min-width: 600px) 600w, 300w');
				expect($img.attr('srcset')).to.not.be.empty;
			});

			it('<img> was processed properly', async () => {
				let $img = $('img');
				expect(new URL($img.attr('src'), 'http://example.com').searchParams.get('w')).to.equal(
					'300'
				);
			});
		});
	});
});