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test.js
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test.js
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/* global document */
import { Buffer } from 'node:buffer'
import fs from 'node:fs'
import test from 'ava'
import imageSize from 'image-size'
import isJpg from 'is-jpg'
import isPng from 'is-png'
import pify from 'pify'
import PNG from 'png-js'
import createTestServer from 'create-test-server'
import { temporaryFile } from 'tempy'
import delay from 'delay'
import toughCookie from 'tough-cookie'
import fileUrl from 'file-url'
import { KnownDevices } from 'puppeteer'
import captureWebsite from './index.js'
const defaultResponse = (() => {
const style = 'background-color: black; width: 100px; height: 100px;'
return `<body style="margin: 0;"><div style="${style}"></div></body>`
})()
const createDefaultServer = async () => {
const server = await createTestServer()
server.get('/', (request, response) => {
response.end(defaultResponse)
})
return server
}
const getPngPixels = async buffer => {
const png = new PNG(buffer)
const pixels = await pify(png.decode.bind(png), { errorFirst: false })()
return pixels
}
let server
let browser
let instance
test.before(async () => {
server = await createDefaultServer()
browser = await captureWebsite._startBrowser()
instance = (url, options) => captureWebsite.buffer(url, {
...options,
_browser: browser,
_keepAlive: true
})
})
test.after(async () => {
await browser.close()
await server.close()
})
test('capture screenshot - from url', async t => {
t.true(isPng(await instance(server.url, {
width: 100,
height: 100
})))
})
test('capture screenshot - from local file', async t => {
t.true(isPng(await instance('fixtures/local-file.html', {
width: 100,
height: 100
})))
})
test('capture screenshot - from file URL', async t => {
t.true(isPng(await instance(fileUrl('fixtures/local-file.html'), {
width: 100,
height: 100
})))
})
test('capture screenshot - from data URL', async t => {
t.true(isPng(await instance('data:text/html,<h1>Awesome!</h1>', {
width: 100,
height: 100
})))
})
test('capture screenshot - from HTML content', async t => {
t.true(isPng(await instance('<h1>Awesome!</h1>', {
inputType: 'html',
width: 100,
height: 100
})))
})
test('captureWebsite.file()', async t => {
const filePath = temporaryFile()
await captureWebsite.file(server.url, filePath, {
width: 100,
height: 100
})
t.true(isPng(fs.readFileSync(filePath)))
})
test('captureWebsite.base64()', async t => {
const screenshot = await captureWebsite.base64(server.url, {
width: 100,
height: 100
})
t.is(typeof screenshot, 'string')
t.true(isPng(Buffer.from(screenshot, 'base64')))
})
test('`type` option', async t => {
t.true(isJpg(await instance(server.url, {
width: 100,
height: 100,
type: 'jpeg'
})))
})
test('`scaleFactor` option', async t => {
const sizeOption = 100
const scaleFactor = 4
const expectedSize = sizeOption * scaleFactor
const size = imageSize(await instance(server.url, {
width: sizeOption,
height: sizeOption,
scaleFactor
}))
t.is(size.width, expectedSize)
t.is(size.height, expectedSize)
})
test('`emulateDevice` option', async t => {
const device = KnownDevices['iPhone X']
const size = imageSize(await instance(server.url, {
emulateDevice: device.name
}))
const { viewport } = device
t.is(size.width, viewport.width * viewport.deviceScaleFactor)
t.is(size.height, viewport.height * viewport.deviceScaleFactor)
})
test('`fullPage` option', async t => {
const size = imageSize(await instance(server.url, {
width: 100,
height: 200,
scaleFactor: 1,
fullPage: true
}))
t.is(size.width, 100)
t.true(size.height > 100)
})
test('`fullPage` option - lazy loading', async t => {
const server = await createTestServer()
const imageCount = 50
server.get('/', async (request, response) => {
response.end(`
<body>
<div style="display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));">
${[...Array.from({ length: imageCount }).keys()].map(image => `<img src="https://picsum.photos/150/150?random=${image}" loading="lazy">`).join('')}
</div>
</body>
`)
})
const size = imageSize(await instance(server.url, {
width: 200,
height: 300,
scaleFactor: 1,
fullPage: true
}))
t.is(size.width, 200)
t.true(size.height > 150)
})
test('`timeout` option', async t => {
const server = await createTestServer()
server.get('/', async (request, response) => {
await delay(5000)
response.end()
})
await t.throwsAsync(instance(server.url, {
width: 100,
height: 100,
timeout: 1
}), { message: /1000 ms exceeded/ })
await server.close()
})
test('`element` option - capture DOM element', async t => {
const size = imageSize(await instance(server.url, {
width: 400,
height: 400,
scaleFactor: 1,
element: 'div'
}))
t.is(size.width, 100)
t.is(size.height, 100)
})
test('`element` option - wait for DOM element', async t => {
const server = await createTestServer()
server.get('/', async (request, response) => {
response.end(`
<body>
<div style="width: 100px; height: 100px;"></div>
<script>
window.setTimeout(() => {
document.querySelector('div').style.display = 'block';
}, 5000);
</script>
</body>
`)
})
const size = imageSize(await instance(server.url, {
width: 400,
height: 400,
scaleFactor: 1,
element: 'div'
}))
t.is(size.width, 100)
t.is(size.height, 100)
await server.close()
})
test('`hideElements` option', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
hideElements: [
'div'
]
}))
t.is(pixels[0], 255)
})
test('`removeElements` option', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
removeElements: [
'div'
]
}))
t.is(pixels[0], 255)
})
test('`clickElement` option', async t => {
const server = await createTestServer()
server.get('/', async (request, response) => {
response.end(`
<body style="margin: 0;">
<div style="background-color: black; width: 100px; height: 100px;"></div>
<script>
document.querySelector('div').addEventListener('click', function () {
this.style.backgroundColor = 'red';
});
</script>
</body>
`)
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
clickElement: 'div'
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
await server.close()
})
test('`scrollToElement` option as string', async t => {
const server = await createTestServer()
server.get('/', async (request, response) => {
response.end(`
<body style="margin: 0;">
<div style="width: 100px; height: 100px; overflow: auto;">
<div style="width: 200px; height: 200px; display: flex; flex-wrap: wrap">
<div id="red" style="background-color: #f00; width: 100px; height: 100px; flex: 1 0 auto;"></div>
<div id="green" style="background-color: #0f0; width: 100px; height: 100px; flex: 1 0 auto;"></div>
<div id="blue" style="background-color: #00f; width: 100px; height: 100px; flex: 1 0 auto;"></div>
<div id="black" style="background-color: #000; width: 100px; height: 100px; flex: 1 0 auto;"></div>
</div>
</div>
</body>
`)
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
scrollToElement: '#black'
}))
t.is(pixels[0], 0)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
await server.close()
})
test('`scrollToElement` option as object', async t => {
const server = await createTestServer()
server.get('/', async (request, response) => {
response.end(`
<body style="margin: 0;">
<div style="width: 100px; height: 100px; overflow: auto;">
<div style="width: 200px; height: 200px; display: flex; flex-wrap: wrap">
<div id="red" style="background-color: #f00; width: 100px; height: 100px; flex: 1 0 auto;"></div>
<div id="green" style="background-color: #0f0; width: 100px; height: 100px; flex: 1 0 auto;"></div>
<div id="blue" style="background-color: #00f; width: 100px; height: 100px; flex: 1 0 auto;"></div>
<div id="black" style="background-color: #000; width: 100px; height: 100px; flex: 1 0 auto;"></div>
</div>
</div>
</body>
`)
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
scrollToElement: {
element: '#green',
offsetFrom: 'top',
offset: 100
}
}))
t.is(pixels[0], 0)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
await server.close()
})
// test('`disableAnimations` option', async t => {
// const server = await createTestServer()
// server.get('/', async (request, response) => {
// response.end(`
// <style>
// div{animation:test 5s infinite}
// @keyframes test{0%{background-color:#fff}100%{background-color:#eee}}
// </style>
// <body style="margin: 0;">
// <div style="background-color: black; width: 100px; height: 100px;"></div>
// </body>
// `)
// })
// const pixels = await getPngPixels(await instance(server.url, {
// width: 100,
// height: 100,
// disableAnimations: true
// }))
// t.is(pixels[0], 0)
// t.is(pixels[1], 0)
// t.is(pixels[2], 0)
// await server.close()
// })
test('`isJavaScriptEnabled: false` option', async t => {
const server = await createTestServer()
server.get('/', async (request, response) => {
response.end(`
<body style="margin: 0;">
<div style="background-color: black; width: 100px; height: 100px;"></div>
<script>
setTimeout(function() {
document.querySelector('div').style.backgroundColor = 'red';
}, 500);
</script>
</body>
`)
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
delay: 1,
isJavaScriptEnabled: false
}))
t.is(pixels[0], 0)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
await server.close()
})
test('`isJavaScriptEnabled: false` works with the `scripts` option', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
isJavaScriptEnabled: false,
scripts: [
'document.querySelector(\'div\').style.backgroundColor = \'red\';'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`isJavaScriptEnabled: false` works with the `modules` option', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
isJavaScriptEnabled: false,
modules: [
'document.querySelector(\'div\').style.backgroundColor = \'red\';'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`modules` option - inline', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
modules: [
'document.querySelector(\'div\').style.backgroundColor = \'red\';'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`modules` option - file', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
modules: [
'fixtures/script.js'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`modules` option - url', async t => {
const server = await createTestServer()
server.get('/', (request, response) => {
response.end(defaultResponse)
})
server.get('/module.js', (request, response) => {
response.set('content-type', 'text/javascript')
response.end('document.querySelector(\'div\').style.backgroundColor = \'red\';')
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
modules: [
`${server.url}/module.js`
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`scripts` option - inline', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
scripts: [
'document.querySelector(\'div\').style.backgroundColor = \'red\';'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`scripts` option - file', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
scripts: [
'fixtures/script.js'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`scripts` option - url', async t => {
const server = await createTestServer()
server.get('/', (request, response) => {
response.end(defaultResponse)
})
server.get('/script.js', (request, response) => {
response.set('content-type', 'text/javascript')
response.end('document.querySelector(\'div\').style.backgroundColor = \'red\';')
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
scripts: [
`${server.url}/script.js`
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`styles` option - inline', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
styles: [
'div { background-color: red !important; }'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`styles` option - file', async t => {
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
styles: [
'fixtures/style.css'
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`styles` option - url', async t => {
const server = await createTestServer()
server.get('/', (request, response) => {
response.end(defaultResponse)
})
server.get('/style.css', (request, response) => {
response.set('content-type', 'text/css')
response.end('div { background-color: red !important; }')
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
styles: [
`${server.url}/style.css`
]
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
})
test('`headers` option', async t => {
const fixture = 'unicorn'
const server = await createTestServer()
let headers
server.get('/', (request, response) => {
headers = request.headers
response.end()
})
await instance(server.url, {
width: 100,
height: 100,
headers: {
fixture
}
})
t.is(headers.fixture, fixture)
await server.close()
})
test('`cookies` option', async t => {
const server = await createTestServer()
server.get('/', (request, response) => {
const color = toughCookie.parse(request.headers.cookie).value || 'white'
const style = `
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-color: ${color};
`
response.end(`<body><div style="${style}"></div></body>`)
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
cookies: [
{
name: 'color',
value: 'black',
domain: 'localhost'
}
]
}))
t.is(pixels[0], 0)
const pixels2 = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
cookies: [
'color=black'
]
}))
t.is(pixels2[0], 0)
await server.close()
})
test('`authentication` option', async t => {
const authentication = {
username: 'foo',
password: 'bar'
}
const url = `https://httpbin.org/basic-auth/${authentication.username}/${authentication.password}`
t.true(isPng(await instance(url, {
authentication
})))
})
test('`overwrite` option', async t => {
const filePath = temporaryFile()
await t.notThrowsAsync(async () => {
await captureWebsite.file(server.url, filePath, {
width: 100,
height: 100
})
await captureWebsite.file(server.url, filePath, {
width: 100,
height: 100,
overwrite: true
})
})
})
test('handle redirects', async t => {
const server = await createTestServer()
server.get('/', (request, response) => {
response.end(defaultResponse)
})
server.get('/redirect', (request, response) => {
response.redirect(server.url)
})
const pixels = await getPngPixels(await instance(`${server.url}/redirect`, {
width: 100,
height: 100
}))
t.is(pixels[0], 0)
await server.close()
})
test('`darkMode` option', async t => {
const server = await createTestServer()
server.get('/', (request, response) => {
response.end(`
<html>
<head>
<style>
body {
background: white;
width: 100px;
height: 100px;
}
@media (prefers-color-scheme: dark) {
body { background: black; }
}
</style>
</head>
<body></body>
</html>
`)
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100
}))
t.is(pixels[0], 255)
t.is(pixels[1], 255)
t.is(pixels[2], 255)
const pixels2 = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
darkMode: true
}))
t.is(pixels2[0], 0)
t.is(pixels2[1], 0)
t.is(pixels2[2], 0)
await server.close()
})
test('`inset` option', async t => {
const viewportOptions = {
scaleFactor: 1,
width: 100,
height: 100
}
// The `inset` and `fullPage` options are exclusive.
// See: https://github.com/puppeteer/puppeteer/blob/e45acce928429d0d1572e16943307a73ebd38d8a/src/common/Page.ts#L1620
// In such cases, the `inset` option should be ignored.
const withFullPageOption = await getPngPixels(await instance(server.url, {
...viewportOptions,
fullPage: true,
inset: 10
}))
// First pixel should be black. Image should have resolution 100x100.
t.is(withFullPageOption[0], 0)
t.is(withFullPageOption[1], 0)
t.is(withFullPageOption[2], 0)
t.true(withFullPageOption.length / 4 === 100 * 100)
// A document with black body with margin 10px containing
// two full-width `div` elements stacked on top of each other.
// First `div` element is red and has height of 20px.
// Second `div` element is white and has height of 500px.
const fixture = 'fixtures/inset-option.html'
// The `element` option overwrites the `fullPage` option,
// therefore should behave as if `fullPage` option was `false`.
const withElementOption = await getPngPixels(await instance(fixture, {
...viewportOptions,
element: 'body',
fullPage: true,
inset: 10
}))
// First pixel should be red. Image should have resolution 80*520.
t.is(withElementOption[0], 255)
t.is(withElementOption[1], 0)
t.is(withElementOption[2], 0)
t.true(withElementOption.length / 4 === 80 * 520)
const viewportPixels = await getPngPixels(await instance(fixture, {
...viewportOptions,
inset: 10
}))
// First pixel should be red. Image should have resolution 80x80.
t.is(viewportPixels[0], 255)
t.is(viewportPixels[1], 0)
t.is(viewportPixels[2], 0)
t.true(viewportPixels.length / 4 === 80 * 80)
const withTopInset = await getPngPixels(await instance(fixture, {
...viewportOptions,
inset: { top: 30, left: 10 }
}))
// First pixel should be white. The image resolution should be 90x70.
t.is(withTopInset[0], 255)
t.is(withTopInset[1], 255)
t.is(withTopInset[2], 255)
t.true(withTopInset.length / 4 === 90 * 70)
const withNegativeInset = await getPngPixels(await instance(fixture, {
...viewportOptions,
element: '.header',
inset: -10
}))
// First pixel should be black. The image resolution should be 100x40.
t.is(withNegativeInset[0], 0)
t.is(withNegativeInset[1], 0)
t.is(withNegativeInset[2], 0)
t.true(withNegativeInset.length / 4 === 100 * 40)
// Should throw if `inset` width or height values are 0.
await t.throwsAsync(async () => {
await instance(fixture, {
...viewportOptions,
inset: 50
})
})
})
test.failing('`preloadFunction` option', async t => {
const server = await createTestServer()
server.get('/', async (request, response) => {
response.end(`
<body style="margin: 0;">
<div style="background-color: black; width: 100px; height: 100px;"></div>
<script async>
globalThis.toRed();
</script>
</body>
`)
})
const pixels = await getPngPixels(await instance(server.url, {
width: 100,
height: 100,
preloadFunction () {
globalThis.toRed = () => {
document.querySelector('div').style.backgroundColor = 'red'
}
}
}))
t.is(pixels[0], 255)
t.is(pixels[1], 0)
t.is(pixels[2], 0)
await server.close()
})
test('`clip` option', async t => {
const size = imageSize(await instance(server.url, {
scaleFactor: 1,
clip: {
x: 10,
y: 30,
width: 500,
height: 300
}
}))
t.is(size.width, 500)
t.is(size.height, 300)
})
test('option validation - The `clip` and `element` option are mutually exclusive', async t => {
const expectedErrorMessage = 'The `clip` and `element` option are mutually exclusive'
const options = {
element: 'html',
clip: {
x: 1,
y: 10,
width: 10,
height: 100
}
}
const error = await t.throwsAsync(captureWebsite.base64(server.url, options))
t.is(error.message, expectedErrorMessage)
})
test('option validation - The `clip` and `fullPage` option are mutually exclusive', async t => {
const expectedErrorMessage = 'The `clip` and `fullPage` option are mutually exclusive'
const options = {
fullPage: true,
clip: {
x: 1,
y: 10,
width: 10,
height: 100
}
}
const error = await t.throwsAsync(captureWebsite.base64(server.url, options))
t.is(error.message, expectedErrorMessage)
})