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import { expect } from 'chai';
import * as cheerio from 'cheerio';
import fs from 'fs';
import sizeOf from 'image-size';
import { fileURLToPath } from 'url';
import { loadFixture } from './test-utils.js';
let fixture;
describe('SSG pictures', function () {
before(async () => {
fixture = await loadFixture({ root: './fixtures/basic-picture/' });
});
function verifyImage(pathname, expected) {
const url = new URL('./fixtures/basic-picture/dist/' + pathname, import.meta.url);
const dist = fileURLToPath(url);
// image-size doesn't support AVIF files
if (expected.type !== 'avif') {
const result = sizeOf(dist);
expect(result).to.deep.equal(expected);
} else {
expect(fs.statSync(dist)).not.to.be.undefined;
}
}
describe('build', () => {
let $;
let html;
before(async () => {
await fixture.build();
html = await fixture.readFile('/index.html');
$ = cheerio.load(html);
});
describe('Local images', () => {
it('includes sources', () => {
const sources = $('#social-jpg source');
expect(sources.length).to.equal(3);
// TODO: better coverage to verify source props
});
it('includes src, width, and height attributes', () => {
const image = $('#social-jpg img');
expect(image.attr('src')).to.equal('/_image/assets/social_506x253.jpg');
expect(image.attr('width')).to.equal('506');
expect(image.attr('height')).to.equal('253');
});
it('built the optimized image', () => {
verifyImage('_image/assets/social_253x127.avif', { width: 253, height: 127, type: 'avif' });
verifyImage('_image/assets/social_253x127.webp', { width: 253, height: 127, type: 'webp' });
verifyImage('_image/assets/social_253x127.jpg', { width: 253, height: 127, type: 'jpg' });
verifyImage('_image/assets/social_506x253.avif', { width: 506, height: 253, type: 'avif' });
verifyImage('_image/assets/social_506x253.webp', { width: 506, height: 253, type: 'webp' });
verifyImage('_image/assets/social_506x253.jpg', { width: 506, height: 253, type: 'jpg' });
});
});
describe('Inline imports', () => {
it('includes sources', () => {
const sources = $('#inline source');
expect(sources.length).to.equal(3);
// TODO: better coverage to verify source props
});
it('includes src, width, and height attributes', () => {
const image = $('#inline img');
expect(image.attr('src')).to.equal('/_image/assets/social_506x253.jpg');
expect(image.attr('width')).to.equal('506');
expect(image.attr('height')).to.equal('253');
});
it('built the optimized image', () => {
verifyImage('_image/assets/social_253x127.avif', { width: 253, height: 127, type: 'avif' });
verifyImage('_image/assets/social_253x127.webp', { width: 253, height: 127, type: 'webp' });
verifyImage('_image/assets/social_253x127.jpg', { width: 253, height: 127, type: 'jpg' });
verifyImage('_image/assets/social_506x253.avif', { width: 506, height: 253, type: 'avif' });
verifyImage('_image/assets/social_506x253.webp', { width: 506, height: 253, type: 'webp' });
verifyImage('_image/assets/social_506x253.jpg', { width: 506, height: 253, type: 'jpg' });
});
});
describe('Remote images', () => {
// Hard-coding in the test! This should never change since the hash is based
// on the static `src` string
const HASH = 'Z1iI4xW';
it('includes sources', () => {
const sources = $('#google source');
expect(sources.length).to.equal(3);
// TODO: better coverage to verify source props
});
it('includes src, width, and height attributes', () => {
const image = $('#google img');
expect(image.attr('src')).to.equal(`/_image/googlelogo_color_272x92dp-${HASH}_544x184.png`);
expect(image.attr('width')).to.equal('544');
expect(image.attr('height')).to.equal('184');
});
it('built the optimized image', () => {
verifyImage(`_image/googlelogo_color_272x92dp-${HASH}_272x92.avif`, {
width: 272,
height: 92,
type: 'avif',
});
verifyImage(`_image/googlelogo_color_272x92dp-${HASH}_272x92.webp`, {
width: 272,
height: 92,
type: 'webp',
});
verifyImage(`_image/googlelogo_color_272x92dp-${HASH}_272x92.png`, {
width: 272,
height: 92,
type: 'png',
});
verifyImage(`_image/googlelogo_color_272x92dp-${HASH}_544x184.avif`, {
width: 544,
height: 184,
type: 'avif',
});
verifyImage(`_image/googlelogo_color_272x92dp-${HASH}_544x184.webp`, {
width: 544,
height: 184,
type: 'webp',
});
verifyImage(`_image/googlelogo_color_272x92dp-${HASH}_544x184.png`, {
width: 544,
height: 184,
type: 'png',
});
});
});
});
describe('dev', () => {
let devServer;
let $;
before(async () => {
devServer = await fixture.startDevServer();
const html = await fixture.fetch('/').then((res) => res.text());
$ = cheerio.load(html);
});
after(async () => {
await devServer.stop();
});
describe('Local images', () => {
it('includes sources', () => {
const sources = $('#social-jpg source');
expect(sources.length).to.equal(3);
// TODO: better coverage to verify source props
});
it('includes src, width, and height attributes', () => {
const image = $('#social-jpg img');
const src = image.attr('src');
const [route, params] = src.split('?');
expect(route).to.equal('/_image');
const searchParams = new URLSearchParams(params);
expect(searchParams.get('f')).to.equal('jpg');
expect(searchParams.get('w')).to.equal('506');
expect(searchParams.get('h')).to.equal('253');
// TODO: possible to avoid encoding the full image path?
expect(searchParams.get('href').endsWith('/assets/social.jpg')).to.equal(true);
});
it('returns the optimized image', async () => {
const image = $('#social-jpg img');
const res = await fixture.fetch(image.attr('src'));
expect(res.status).to.equal(200);
expect(res.headers.get('Content-Type')).to.equal('image/jpeg');
// TODO: verify image file? It looks like sizeOf doesn't support ArrayBuffers
});
});
describe('Local images with inline imports', () => {
it('includes sources', () => {
const sources = $('#inline source');
expect(sources.length).to.equal(3);
// TODO: better coverage to verify source props
});
it('includes src, width, and height attributes', () => {
const image = $('#inline img');
const src = image.attr('src');
const [route, params] = src.split('?');
expect(route).to.equal('/_image');
const searchParams = new URLSearchParams(params);
expect(searchParams.get('f')).to.equal('jpg');
expect(searchParams.get('w')).to.equal('506');
expect(searchParams.get('h')).to.equal('253');
// TODO: possible to avoid encoding the full image path?
expect(searchParams.get('href').endsWith('/assets/social.jpg')).to.equal(true);
});
it('returns the optimized image', async () => {
const image = $('#inline img');
const res = await fixture.fetch(image.attr('src'));
expect(res.status).to.equal(200);
expect(res.headers.get('Content-Type')).to.equal('image/jpeg');
// TODO: verify image file? It looks like sizeOf doesn't support ArrayBuffers
});
});
describe('Remote images', () => {
it('includes sources', () => {
const sources = $('#google source');
expect(sources.length).to.equal(3);
// TODO: better coverage to verify source props
});
it('includes src, width, and height attributes', () => {
const image = $('#google img');
const src = image.attr('src');
const [route, params] = src.split('?');
expect(route).to.equal('/_image');
const searchParams = new URLSearchParams(params);
expect(searchParams.get('f')).to.equal('png');
expect(searchParams.get('w')).to.equal('544');
expect(searchParams.get('h')).to.equal('184');
expect(searchParams.get('href')).to.equal(
'https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png'
);
});
});
});
});
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