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import { join } from 'path'
import { getBrowserBodyText, retry, waitFor } from 'next-test-utils'
import { nextTestSetup } from 'e2e-utils'
export function runHotModuleReloadHmrTest(nextConfig: {
basePath: string
assetPrefix: string
}) {
const { next } = nextTestSetup({
files: __dirname,
nextConfig,
patchFileDelay: 500,
})
const { basePath } = nextConfig
describe('delete a page and add it back', () => {
it('should load the page properly', async () => {
const contactPagePath = join('pages', 'hmr', 'contact.js')
const newContactPagePath = join('pages', 'hmr', '_contact.js')
const browser = await next.browser(basePath + '/hmr/contact')
try {
const text = await browser.elementByCss('p').text()
expect(text).toBe('This is the contact page.')
// Rename the file to mimic a deleted page
await next.renameFile(contactPagePath, newContactPagePath)
await retry(async () => {
expect(await getBrowserBodyText(browser)).toMatch(
/This page could not be found/
)
})
// Rename the file back to the original filename
await next.renameFile(newContactPagePath, contactPagePath)
// wait until the page comes back
await retry(async () => {
expect(await getBrowserBodyText(browser)).toMatch(
/This is the contact page/
)
})
expect(next.cliOutput).toContain('Compiled /_error')
} finally {
await next
.renameFile(newContactPagePath, contactPagePath)
.catch(() => {})
}
})
})
describe('editing a page', () => {
it('should detect the changes and display it', async () => {
const browser = await next.browser(basePath + '/hmr/about')
const text = await browser.elementByCss('p').text()
expect(text).toBe('This is the about page.')
const aboutPagePath = join('pages', 'hmr', 'about.js')
const originalContent = await next.readFile(aboutPagePath)
const editedContent = originalContent.replace(
'This is the about page',
'COOL page'
)
// change the content
try {
await next.patchFile(aboutPagePath, editedContent)
await retry(async () => {
expect(await getBrowserBodyText(browser)).toMatch(/COOL page/)
})
} finally {
// add the original content
await next.patchFile(aboutPagePath, originalContent)
}
await retry(async () => {
expect(await getBrowserBodyText(browser)).toMatch(
/This is the about page/
)
})
})
it('should not reload unrelated pages', async () => {
const browser = await next.browser(basePath + '/hmr/counter')
const text = await browser
.elementByCss('button')
.click()
.elementByCss('button')
.click()
.elementByCss('p')
.text()
expect(text).toBe('COUNT: 2')
const aboutPagePath = join('pages', 'hmr', 'about.js')
const originalContent = await next.readFile(aboutPagePath)
const editedContent = originalContent.replace(
'This is the about page',
'COOL page'
)
try {
// Change the about.js page
await next.patchFile(aboutPagePath, editedContent)
// Check whether the this page has reloaded or not.
await retry(async () => {
expect(await browser.elementByCss('p').text()).toMatch(/COUNT: 2/)
})
} finally {
// restore the about page content.
await next.patchFile(aboutPagePath, originalContent)
}
})
// Added because of a regression in react-hot-loader, see issues: #4246 #4273
// Also: https://github.com/vercel/styled-jsx/issues/425
it('should update styles correctly', async () => {
const browser = await next.browser(basePath + '/hmr/style')
const pTag = await browser.elementByCss('.hmr-style-page p')
const initialFontSize = await pTag.getComputedCss('font-size')
expect(initialFontSize).toBe('100px')
const pagePath = join('pages', 'hmr', 'style.js')
const originalContent = await next.readFile(pagePath)
const editedContent = originalContent.replace('100px', '200px')
// Change the page
await next.patchFile(pagePath, editedContent)
try {
// Check whether the this page has reloaded or not.
await retry(async () => {
const editedPTag = await browser.elementByCss('.hmr-style-page p')
expect(await editedPTag.getComputedCss('font-size')).toBe('200px')
})
} finally {
// Finally is used so that we revert the content back to the original regardless of the test outcome
// restore the about page content.
await next.patchFile(pagePath, originalContent)
}
})
// Added because of a regression in react-hot-loader, see issues: #4246 #4273
// Also: https://github.com/vercel/styled-jsx/issues/425
it('should update styles in a stateful component correctly', async () => {
const browser = await next.browser(
basePath + '/hmr/style-stateful-component'
)
const pagePath = join('pages', 'hmr', 'style-stateful-component.js')
const originalContent = await next.readFile(pagePath)
try {
const pTag = await browser.elementByCss('.hmr-style-page p')
const initialFontSize = await pTag.getComputedCss('font-size')
expect(initialFontSize).toBe('100px')
const editedContent = originalContent.replace('100px', '200px')
// Change the page
await next.patchFile(pagePath, editedContent)
// Check whether the this page has reloaded or not.
await retry(async () => {
const editedPTag = await browser.elementByCss('.hmr-style-page p')
expect(await editedPTag.getComputedCss('font-size')).toBe('200px')
})
} finally {
await next.patchFile(pagePath, originalContent)
}
})
// Added because of a regression in react-hot-loader, see issues: #4246 #4273
// Also: https://github.com/vercel/styled-jsx/issues/425
it('should update styles in a dynamic component correctly', async () => {
const browser = await next.browser(
basePath + '/hmr/style-dynamic-component'
)
const secondBrowser = await next.browser(
basePath + '/hmr/style-dynamic-component'
)
const pagePath = join('components', 'hmr', 'dynamic.js')
const originalContent = await next.readFile(pagePath)
try {
const div = await browser.elementByCss('#dynamic-component')
const initialClientClassName = await div.getAttribute('class')
const initialFontSize = await div.getComputedCss('font-size')
expect(initialFontSize).toBe('100px')
const initialHtml = await next.render(
basePath + '/hmr/style-dynamic-component'
)
expect(initialHtml.includes('100px')).toBeTruthy()
const $initialHtml = await next.render$(
basePath + '/hmr/style-dynamic-component'
)
const initialServerClassName =
$initialHtml('#dynamic-component').attr('class')
expect(initialClientClassName === initialServerClassName).toBeTruthy()
const editedContent = originalContent.replace('100px', '200px')
// Change the page
await next.patchFile(pagePath, editedContent)
// wait for 5 seconds
await waitFor(5000)
// Check whether the this page has reloaded or not.
const editedDiv = await secondBrowser.elementByCss('#dynamic-component')
const editedClientClassName = await editedDiv.getAttribute('class')
const editedFontSize = await editedDiv.getComputedCss('font-size')
const browserHtml = await secondBrowser.eval(
'document.documentElement.innerHTML'
)
expect(editedFontSize).toBe('200px')
expect(browserHtml.includes('font-size:200px')).toBe(true)
expect(browserHtml.includes('font-size:100px')).toBe(false)
const editedHtml = await next.render(
basePath + '/hmr/style-dynamic-component'
)
expect(editedHtml.includes('200px')).toBeTruthy()
const $editedHtml = await next.render$(
basePath + '/hmr/style-dynamic-component'
)
const editedServerClassName =
$editedHtml('#dynamic-component').attr('class')
expect(editedClientClassName === editedServerClassName).toBe(true)
} finally {
// Finally is used so that we revert the content back to the original regardless of the test outcome
// restore the about page content.
await next.patchFile(pagePath, originalContent)
}
})
it('should not full reload when nonlatin characters are used', async () => {
const browser = await next.browser(basePath + '/hmr/nonlatin')
const pagePath = join('pages', 'hmr', 'nonlatin.js')
const originalContent = await next.readFile(pagePath)
try {
const timeOrigin = await browser.eval('performance.timeOrigin')
const editedContent = originalContent.replace(
'<div>テスト</div>',
'<div class="updated">テスト</div>'
)
// Change the page
await next.patchFile(pagePath, editedContent)
await browser.waitForElementByCss('.updated')
expect(await browser.eval('performance.timeOrigin')).toEqual(timeOrigin)
} finally {
// Finally is used so that we revert the content back to the original regardless of the test outcome
// restore the about page content.
await next.patchFile(pagePath, originalContent)
}
})
})
}
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