Nuxt/test/bundle.test.ts

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import { fileURLToPath } from 'node:url'
import fsp from 'node:fs/promises'
import { beforeAll, describe, expect, it } from 'vitest'
import { execaCommand } from 'execa'
import { globby } from 'globby'
import { join } from 'pathe'
describe.skipIf(process.env.SKIP_BUNDLE_SIZE === 'true' || process.env.ECOSYSTEM_CI)('minimal nuxt application', () => {
const rootDir = fileURLToPath(new URL('./fixtures/minimal', import.meta.url))
beforeAll(async () => {
await Promise.all([
execaCommand(`pnpm nuxi build ${rootDir}`, { env: { EXTERNAL_VUE: 'false' } }),
execaCommand(`pnpm nuxi build ${rootDir}`, { env: { EXTERNAL_VUE: 'true' } })
])
}, 120 * 1000)
// Identical behaviour between inline/external vue options as this should only affect the server build
for (const outputDir of ['.output', '.output-inline']) {
it('default client bundle size', async () => {
const clientStats = await analyzeSizes('**/*.js', join(rootDir, outputDir, 'public'))
expect.soft(roundToKilobytes(clientStats.totalBytes)).toMatchInlineSnapshot('"97.4k"')
expect(clientStats.files.map(f => f.replace(/\..*\.js/, '.js'))).toMatchInlineSnapshot(`
[
"_nuxt/entry.js",
]
`)
})
}
it('default server bundle size', async () => {
const serverDir = join(rootDir, '.output/server')
const serverStats = await analyzeSizes(['**/*.mjs', '!node_modules'], serverDir)
expect.soft(roundToKilobytes(serverStats.totalBytes)).toMatchInlineSnapshot('"64.5k"')
const modules = await analyzeSizes('node_modules/**/*', serverDir)
expect.soft(roundToKilobytes(modules.totalBytes)).toMatchInlineSnapshot('"2346k"')
const packages = modules.files
.filter(m => m.endsWith('package.json'))
.map(m => m.replace('/package.json', '').replace('node_modules/', ''))
.sort()
expect(packages).toMatchInlineSnapshot(`
[
"@babel/parser",
"@unhead/dom",
"@unhead/shared",
"@unhead/ssr",
"@vue/compiler-core",
"@vue/compiler-dom",
"@vue/compiler-ssr",
"@vue/reactivity",
"@vue/runtime-core",
"@vue/runtime-dom",
"@vue/server-renderer",
"@vue/shared",
"cookie-es",
"debug",
"defu",
"destr",
"devalue",
"estree-walker",
"h3",
"has-flag",
"hookable",
"http-graceful-shutdown",
"iron-webcrypto",
"klona",
"ms",
"node-fetch-native",
"ofetch",
"ohash",
"pathe",
"radix3",
"scule",
"source-map-js",
"supports-color",
"ufo",
"uncrypto",
"unctx",
"unenv",
"unhead",
"unstorage",
"vue",
"vue-bundle-renderer",
]
`)
})
it('default server bundle size (inlined vue modules)', async () => {
const serverDir = join(rootDir, '.output-inline/server')
const serverStats = await analyzeSizes(['**/*.mjs', '!node_modules'], serverDir)
expect.soft(roundToKilobytes(serverStats.totalBytes)).toMatchInlineSnapshot('"370k"')
const modules = await analyzeSizes('node_modules/**/*', serverDir)
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expect.soft(roundToKilobytes(modules.totalBytes)).toMatchInlineSnapshot('"607k"')
const packages = modules.files
.filter(m => m.endsWith('package.json'))
.map(m => m.replace('/package.json', '').replace('node_modules/', ''))
.sort()
expect(packages).toMatchInlineSnapshot(`
[
"@unhead/dom",
"@unhead/shared",
"@unhead/ssr",
"cookie-es",
"debug",
"defu",
"destr",
"devalue",
"h3",
"has-flag",
"hookable",
"http-graceful-shutdown",
"iron-webcrypto",
"klona",
"ms",
"node-fetch-native",
"ofetch",
"ohash",
"pathe",
"radix3",
"scule",
"supports-color",
"ufo",
"uncrypto",
"unctx",
"unenv",
"unhead",
"unstorage",
]
`)
})
})
async function analyzeSizes (pattern: string | string[], rootDir: string) {
const files: string[] = await globby(pattern, { cwd: rootDir })
let totalBytes = 0
for (const file of files) {
const path = join(rootDir, file)
const isSymlink = (await fsp.lstat(path).catch(() => null))?.isSymbolicLink()
if (!isSymlink) {
const bytes = Buffer.byteLength(await fsp.readFile(path))
totalBytes += bytes
}
}
return { files, totalBytes }
}
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function roundToKilobytes (bytes: number) {
return (bytes / 1024).toFixed(bytes > (100 * 1024) ? 0 : 1) + 'k'
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}