Module ID strategies tests

test/integration/module-id-strategies/module-with-long-name.js

@@ -0,0 +1,3 @@
+module.exports = {
+  foo: 'a very long module name!',
+}

test/integration/module-id-strategies/next.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+  bundlePagesRouterDependencies: true,
+  serverExternalPackages: ['opted-out-external-package'],
+}

test/integration/module-id-strategies/pages/index.js

@@ -0,0 +1,5 @@
+import { foo } from '../module-with-long-name'
+
+export default function Index() {
+  return <div>{foo}</div>
+}

test/integration/module-id-strategies/test/index.test.js

@@ -0,0 +1,67 @@
+/* eslint-env jest */
+
+import fs from 'fs-extra'
+import { join } from 'path'
+import {
+  killApp,
+  findPort,
+  launchApp,
+  nextBuild,
+  renderViaHTTP,
+} from 'next-test-utils'
+
+const appDir = join(__dirname, '../')
+
+let appPort
+let app
+
+describe('minified module ids', () => {
+  ;(!process.env.TURBOPACK || process.env.TURBOPACK_DEV
+    ? describe.skip
+    : describe)('production mode', () => {
+    beforeAll(async () => {
+      await nextBuild(appDir, [])
+    })
+
+    it('should have no long module ids', async () => {
+      const ssrPath = join(appDir, '.next/server/chunks/ssr')
+      const pageBundleBasenames = (await fs.readdir(ssrPath)).filter((p) =>
+        p.match(/\.js$/)
+      )
+      expect(pageBundleBasenames).not.toBeEmpty()
+      let allBundles = ''
+      for (const basename of pageBundleBasenames) {
+        const output = await fs.readFile(join(ssrPath, basename), 'utf8')
+        allBundles += output
+      }
+
+      expect(allBundles).not.toContain('module-with-long-name')
+    })
+  })
+  ;(!process.env.TURBOPACK || process.env.TURBOPACK_BUILD
+    ? describe.skip
+    : describe)('development mode', () => {
+    beforeAll(async () => {
+      appPort = await findPort()
+      app = await launchApp(appDir, appPort)
+    })
+    afterAll(() => killApp(app))
+
+    it('should have long module ids', async () => {
+      await renderViaHTTP(appPort, '/')
+
+      const ssrPath = join(appDir, '.next/server/chunks/ssr')
+      const pageBundleBasenames = (await fs.readdir(ssrPath)).filter((p) =>
+        p.match(/\.js$/)
+      )
+      expect(pageBundleBasenames).not.toBeEmpty()
+      let allBundles = ''
+      for (const basename of pageBundleBasenames) {
+        const output = await fs.readFile(join(ssrPath, basename), 'utf8')
+        allBundles += output
+      }
+
+      expect(allBundles).toContain('module-with-long-name')
+    })
+  })
+})