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next.js/test/e2e/app-dir/router-disable-smooth-scroll/router-disable-smooth-scroll.optimized.test.ts
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first commit
2026-03-10 19:37:31 +03:30

129 lines
3.9 KiB
TypeScript

import { nextTestSetup } from 'e2e-utils'
import { retry } from 'next-test-utils'
describe('router smooth scroll optimization', () => {
const { next } = nextTestSetup({
files: __dirname + '/fixtures/optimized',
})
const getTopScroll = async (browser: any) =>
await browser.eval('document.documentElement.scrollTop')
const waitForScrollToComplete = async (browser: any, expectedY: number) => {
await retry(async () => {
const top = await getTopScroll(browser)
expect(top).toBe(expectedY)
})
}
const scrollTo = async (browser: any, y: number) => {
await browser.eval(`window.scrollTo(0, ${y})`)
// Add a small delay for scroll to complete
await browser.eval('new Promise(resolve => setTimeout(resolve, 100))')
await waitForScrollToComplete(browser, y)
}
it('should work with smooth scroll CSS and data attribute without warning', async () => {
const browser = await next.browser('/page1')
await scrollTo(browser, 1000)
expect(await getTopScroll(browser)).toBe(1000)
// Wait for page to be rendered
await browser.waitForElementByCss('#to-page2')
// Click navigation and wait for new page to load
await browser.elementByCss('#to-page2').click()
// Wait for the new page to load completely
await browser.waitForElementByCss('h1')
await retry(async () => {
const text = await browser.elementByCss('h1').text()
expect(text).toBe('Optimized Page 2')
})
await waitForScrollToComplete(browser, 0)
// Assert no warning appears in optimized case
await retry(async () => {
const logs = await browser.log()
expect(
logs.some((log) =>
log.message.includes(
'Detected `scroll-behavior: smooth` on the `<html>` element.'
)
)
).toBe(false)
})
})
})
describe('router smooth scroll optimization (optimized early exit)', () => {
const { next, isNextDev } = nextTestSetup({
files: __dirname + '/fixtures/optimized-no-data',
})
const getTopScroll = async (browser: any) =>
await browser.eval('document.documentElement.scrollTop')
const waitForScrollToComplete = async (browser: any, expectedY: number) => {
await retry(async () => {
const top = await getTopScroll(browser)
expect(top).toBe(expectedY)
})
}
const scrollTo = async (browser: any, y: number) => {
await browser.eval(`window.scrollTo(0, ${y})`)
// Add a small delay for scroll to complete
await browser.eval('new Promise(resolve => setTimeout(resolve, 100))')
await waitForScrollToComplete(browser, y)
}
it('should warn in dev when CSS smooth scroll detected but no data attribute', async () => {
const browser = await next.browser('/page1')
// Verify CSS smooth scrolling is present
const scrollBehavior = await browser.eval(
'getComputedStyle(document.documentElement).scrollBehavior'
)
expect(scrollBehavior).toBe('smooth')
// Verify no data attribute
const hasDataAttribute = await browser.eval(
'document.documentElement.dataset.scrollBehavior === "smooth"'
)
expect(hasDataAttribute).toBe(false)
await scrollTo(browser, 1000)
expect(await getTopScroll(browser)).toBe(1000)
// Wait for page to be rendered
await browser.waitForElementByCss('#to-page2')
// Click navigation and wait for new page to load
await browser.elementByCss('#to-page2').click()
// Wait for the new page to load completely
await browser.waitForElementByCss('h1')
await retry(async () => {
const text = await browser.elementByCss('h1').text()
expect(text).toBe('Optimized Page 2')
})
await waitForScrollToComplete(browser, 0)
const shouldWarn = isNextDev
await retry(async () => {
const logs = await browser.log()
expect(
logs.some((log) =>
log.message.includes(
'Detected `scroll-behavior: smooth` on the `<html>` element.'
)
)
).toBe(shouldWarn)
})
})
})