Nuxt/test/hmr.test.ts

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import { promises as fsp } from 'node:fs'
import { fileURLToPath } from 'node:url'
import { describe, expect, it } from 'vitest'
import { isWindows } from 'std-env'
import { join } from 'pathe'
import { setup, $fetch } from '@nuxt/test-utils'
import { expectWithPolling, renderPage } from './utils'
const isWebpack = process.env.TEST_BUILDER === 'webpack'
// TODO: fix HMR on Windows
if (process.env.TEST_ENV !== 'built' && !isWindows) {
const fixturePath = fileURLToPath(new URL('./fixtures-temp/basic', import.meta.url))
await setup({
rootDir: fixturePath,
dev: true,
server: true,
browser: true,
setupTimeout: (isWindows ? 240 : 120) * 1000,
nuxtConfig: {
builder: isWebpack ? 'webpack' : 'vite',
buildDir: process.env.NITRO_BUILD_DIR,
nitro: { output: { dir: process.env.NITRO_OUTPUT_DIR } }
}
})
describe('hmr', () => {
it('should work', async () => {
const { page, pageErrors, consoleLogs } = await renderPage('/')
expect(await page.title()).toBe('Basic fixture')
expect((await page.$('.sugar-counter').then(r => r!.textContent()))!.trim())
.toEqual('Sugar Counter 12 x 2 = 24 Inc')
// reactive
await page.$('.sugar-counter button').then(r => r!.click())
expect((await page.$('.sugar-counter').then(r => r!.textContent()))!.trim())
.toEqual('Sugar Counter 13 x 2 = 26 Inc')
// modify file
let indexVue = await fsp.readFile(join(fixturePath, 'pages/index.vue'), 'utf8')
indexVue = indexVue
.replace('<Title>Basic fixture</Title>', '<Title>Basic fixture HMR</Title>')
.replace('<h1>Hello Nuxt 3!</h1>', '<h1>Hello Nuxt 3! HMR</h1>')
indexVue += '<style scoped>\nh1 { color: red }\n</style>'
await fsp.writeFile(join(fixturePath, 'pages/index.vue'), indexVue)
await expectWithPolling(
() => page.title(),
'Basic fixture HMR'
)
// content HMR
const h1 = await page.$('h1')
expect(await h1!.textContent()).toBe('Hello Nuxt 3! HMR')
// style HMR
const h1Color = await h1!.evaluate(el => window.getComputedStyle(el).getPropertyValue('color'))
expect(h1Color).toMatchInlineSnapshot('"rgb(255, 0, 0)"')
// ensure no errors
const consoleLogErrors = consoleLogs.filter(i => i.type === 'error')
const consoleLogWarnings = consoleLogs.filter(i => i.type === 'warn')
expect(pageErrors).toEqual([])
expect(consoleLogErrors).toEqual([])
expect(consoleLogWarnings).toEqual([])
}, 60_000)
it('should detect new routes', async () => {
const html = await $fetch('/some-404')
expect(html).toContain('catchall at some-404')
// write new page route
const indexVue = await fsp.readFile(join(fixturePath, 'pages/index.vue'), 'utf8')
await fsp.writeFile(join(fixturePath, 'pages/some-404.vue'), indexVue)
await expectWithPolling(
() => $fetch('/some-404').then(r => r.includes('Hello Nuxt 3')),
true
)
})
})
} else {
describe.skip('hmr', () => {})
}