add additional test

test/integration/relay-analytics/test/disabled.test.js

@@ -1,21 +1,28 @@
 /* eslint-env jest */
 
-import { join } from 'path'
+import fs from 'fs-extra'
+import { findPort, killApp, nextBuild, nextStart } from 'next-test-utils'
 import webdriver from 'next-webdriver'
-import { killApp, findPort, nextBuild, nextStart } from 'next-test-utils'
+import path, { join } from 'path'
 
 const appDir = join(__dirname, '../')
 let appPort
 let server
 jest.setTimeout(1000 * 60 * 2)
 
+let buildManifest
+
 describe('Analytics relayer (disabled)', () => {
   let stdout
   beforeAll(async () => {
     appPort = await findPort()
     ;({ stdout } = await nextBuild(appDir, [], {
       stdout: true,
     }))
+    buildManifest = require(path.join(
+      appDir,
+      '.next/build-manifest.json'
+    ), 'utf8')
     server = await nextStart(appDir, appPort)
   })
   afterAll(() => killApp(server))
@@ -43,4 +50,23 @@ describe('Analytics relayer (disabled)', () => {
 
     await browser.close()
   })
+
+  it('Does not include the code', async () => {
+    const pageFiles = [
+      ...new Set([
+        ...buildManifest.pages['/'].filter((file) => file.endsWith('.js')),
+        ...buildManifest.pages['/_app'].filter((file) => file.endsWith('.js')),
+      ]),
+    ]
+
+    expect(pageFiles.length).toBeGreaterThan(1)
+
+    for (const pageFile of pageFiles) {
+      const content = await fs.readFile(
+        path.join(appDir, '.next', pageFile),
+        'utf8'
+      )
+      expect(content).not.toMatch('vercel-analytics')
+    }
+  })
 })