test: analyzeBundleSize

package.json

@@ -57,6 +57,7 @@
     "changelogen": "^0.5.4",
     "eslint": "^8.44.0",
     "eslint-define-config": "^1.21.0",
+    "fast-folder-size": "^2.1.0",
     "jsdom": "^22.1.0",
     "nuxt": "^3.6.2",
     "quasar": "^2.12.2",

test/__snapshots__/analyzeBundleSize.test.ts.snap

@@ -0,0 +1,5 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`Analyze Bundle Size > bundle size snapshots > e7a375265d7bbc05627f6431e3306dc1a25a91f0.client 1`] = `436139`;
+
+exports[`Analyze Bundle Size > bundle size snapshots > e7a375265d7bbc05627f6431e3306dc1a25a91f0.nitro 1`] = `3917094`;

test/analyzeBundleSize.test.ts

@@ -0,0 +1,40 @@
+import { fileURLToPath } from 'node:url'
+import { promisify } from 'node:util'
+import { createHash } from 'node:crypto'
+import { createReadStream } from 'node:fs'
+import { finished } from 'node:stream/promises'
+import { join } from 'node:path'
+import { describe, expect, it } from 'vitest'
+import { setup, useTestContext } from '@nuxt/test-utils'
+import folderSizeCallback from 'fast-folder-size'
+
+const folderSize = promisify(folderSizeCallback)
+
+describe('Analyze Bundle Size', async () => {
+  await setup({
+    rootDir: fileURLToPath(new URL('./fixtures/basic', import.meta.url)),
+    server: false,
+  })
+
+  it('bundle size snapshots', async () => {
+    const ctx = useTestContext()
+    const { buildDir } = ctx.nuxt!.options
+
+    const lockFile = fileURLToPath(new URL('../pnpm-lock.yaml', import.meta.url))
+    const lockHash = await createFileHash(lockFile)
+
+    const clientBundle = await folderSize(join(buildDir, 'dist/client'))
+    const nitroBundle = await folderSize(join(buildDir, 'output'))
+
+    expect(clientBundle).toMatchSnapshot(`${lockHash}.client`)
+    expect(nitroBundle).toMatchSnapshot(`${lockHash}.nitro`)
+  })
+})
+
+async function createFileHash(path: string) {
+  const hash = createHash('sha1')
+  const stream = createReadStream(path)
+  stream.pipe(hash)
+  await finished(stream)
+  return hash.digest('hex')
+}