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index.test.js
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index.test.js
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/* eslint-env jest */
import { join } from 'path'
import {
check,
findPort,
killApp,
launchApp,
nextBuild,
nextStart,
} from 'next-test-utils'
import webdriver from 'next-webdriver'
const appDir = join(__dirname, '../')
let appPort
let app
function runTests() {
it('should not optimize any image', async () => {
const browser = await webdriver(appPort, '/')
expect(
await browser.elementById('internal-image').getAttribute('src')
).toMatch('data:')
expect(
await browser.elementById('static-image').getAttribute('src')
).toMatch('data:')
expect(
await browser.elementById('external-image').getAttribute('src')
).toMatch('data:')
expect(await browser.elementById('eager-image').getAttribute('src')).toBe(
'/test.webp'
)
expect(
await browser.elementById('internal-image').getAttribute('srcset')
).toBeNull()
expect(
await browser.elementById('static-image').getAttribute('srcset')
).toBeNull()
expect(
await browser.elementById('external-image').getAttribute('srcset')
).toBeNull()
expect(
await browser.elementById('eager-image').getAttribute('srcset')
).toBeNull()
await browser.eval(
`document.getElementById("internal-image").scrollIntoView({behavior: "smooth"})`
)
await browser.eval(
`document.getElementById("static-image").scrollIntoView({behavior: "smooth"})`
)
await browser.eval(
`document.getElementById("external-image").scrollIntoView({behavior: "smooth"})`
)
await browser.eval(
`document.getElementById("eager-image").scrollIntoView({behavior: "smooth"})`
)
await check(
() =>
browser.eval(`document.getElementById("external-image").currentSrc`),
'https://image-optimization-test.vercel.app/test.jpg'
)
await check(
() => browser.elementById('internal-image').getAttribute('src'),
'/test.png'
)
await check(
() => browser.elementById('static-image').getAttribute('src'),
/test(.*)jpg/
)
await check(
() => browser.elementById('external-image').getAttribute('src'),
'https://image-optimization-test.vercel.app/test.jpg'
)
await check(
() => browser.elementById('eager-image').getAttribute('src'),
'/test.webp'
)
expect(
await browser.elementById('internal-image').getAttribute('srcset')
).toBeNull()
expect(
await browser.elementById('static-image').getAttribute('srcset')
).toBeNull()
expect(
await browser.elementById('external-image').getAttribute('srcset')
).toBeNull()
expect(
await browser.elementById('eager-image').getAttribute('srcset')
).toBeNull()
})
}
describe('Unoptimized Image Tests', () => {
describe('dev mode', () => {
beforeAll(async () => {
appPort = await findPort()
app = await launchApp(appDir, appPort)
})
afterAll(async () => {
await killApp(app)
})
runTests('dev')
})
describe('server mode', () => {
beforeAll(async () => {
await nextBuild(appDir)
appPort = await findPort()
app = await nextStart(appDir, appPort)
})
afterAll(async () => {
await killApp(app)
})
runTests('server')
})
})