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[test] Add test for dev rendering indicator #80205

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Merged
eps1lon merged 1 commit into from
Jun 5, 2025
Merged

[test] Add test for dev rendering indicator #80205

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16 changes: 16 additions & 0 deletions test/development/dev-indicator/app/app/rendering/a/page.js
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import Link from 'next/link'
import { connection } from 'next/server'
import { setTimeout } from 'timers/promises'

export default async function Page() {
await connection()
await setTimeout(100)

return (
<>
<Link href="/app/rendering/b" id="to-b">
Go to b
</Link>
</>
)
}
15 changes: 15 additions & 0 deletions test/development/dev-indicator/app/app/rendering/b/page.js
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import Link from 'next/link'
import { connection } from 'next/server'
import { setTimeout } from 'timers/promises'

export default async function Page() {
await connection()
await setTimeout(100)
return (
<>
<Link href="/app/rendering/a" id="to-a">
Go to a
</Link>
</>
)
}
7 changes: 7 additions & 0 deletions test/development/dev-indicator/app/layout.js
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@@ -0,0 +1,7 @@
export default function RootLayout({ children }) {
return (
<html lang="en">
<body>{children}</body>
</html>
)
}
44 changes: 44 additions & 0 deletions test/development/dev-indicator/dev-rendering-indicator.test.ts
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/* eslint-env jest */

import { nextTestSetup } from 'e2e-utils'
import { retry } from 'next-test-utils'

const installCheckVisible = (browser) => {
return browser.eval(`(function() {
window.checkInterval = setInterval(function() {
const root = document.querySelector('nextjs-portal').shadowRoot;
const indicator = root.querySelector('[data-next-mark]')
window.showedBuilder = window.showedBuilder || (
indicator.getAttribute('data-next-mark-loading') === 'true'
)
if (window.showedBuilder) clearInterval(window.checkInterval)
}, 5)
})()`)
}

describe('Dev Rendering Indicator', () => {
const { next } = nextTestSetup({
files: __dirname,
})

it('Shows build indicator when page is built from modifying', async () => {
// Ensure both pages are built first so that we don't confuse it with build indicator
await Promise.all([
next.fetch('/app/rendering/a'),
next.fetch('/app/rendering/b'),
])
const browser = await next.browser('/app/rendering/a')
await installCheckVisible(browser)
await browser.eval('window.showedBuilder = false')

await browser.elementByCss('[href="/app/rendering/b"]').click()
await retry(async () => {
await browser.elementByCss('[href="/app/rendering/a"]')
})

const showedRenderingIndicator = await browser.eval('window.showedBuilder')
expect({ showedRenderingIndicator }).toEqual({
showedRenderingIndicator: true,
})
})
})
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