Add test for /dashboard/index (#7065)

This adds a test to the custom-server suite to make sure we don't regress on this

packages/next-server/server/get-page-files.ts

@@ -9,7 +9,11 @@ export type BuildManifest = {
 
 export function getPageFiles(buildManifest: BuildManifest, page: string): string[] {
   const normalizedPage = normalizePagePath(page)
-  const files = buildManifest.pages[normalizedPage]
+  let files = buildManifest.pages[normalizedPage]
+
+  if (!files) {
+    files = buildManifest.pages[normalizedPage.replace(/\/index$/, '') || '/']
+  }
 
   if (!files) {
     // tslint:disable-next-line

packages/next-server/server/require.ts

@@ -22,9 +22,13 @@ export function getPagePath(page: string, distDir: string): string {
   }
 
   if (!pagesManifest[page]) {
-    throw pageNotFoundError(page)
+    const cleanedPage = page.replace(/\/index$/, '') || '/'
+    if (!pagesManifest[cleanedPage]) {
+      throw pageNotFoundError(page)
+    } else {
+      page = cleanedPage
+    }
   }
-
   return join(serverBuildPath, pagesManifest[page])
 }
 

test/integration/custom-server/pages/dashboard/index.js

+export default () => <p>made it to dashboard</p>

test/integration/custom-server/server.js

@@ -28,6 +28,10 @@ app.prepare().then(() => {
       return app.render(req, res, '/index')
     }
 
+    if (/dashboard/.test(req.url)) {
+      return app.render(req, res, '/dashboard/index')
+    }
+
     handleNextRequests(req, res)
   })
 

test/integration/custom-server/test/index.test.js

@@ -68,6 +68,11 @@ describe('Custom Server', () => {
         expect(dynamicUsage).toMatch(/127\.0\.0\.1/)
       }
     })
+
+    it('should render nested index', async () => {
+      const html = await renderViaHTTP(appPort, '/dashboard')
+      expect(html).toMatch(/made it to dashboard/)
+    })
   })
 
   describe('with generateEtags enabled', () => {