Improve Nested Catch-All Coverage

test/integration/prerender/pages/catchall/[...slug].js

@@ -29,5 +29,5 @@ export default ({ slug }) => {
   if (isFallback) {
     return <p id="catchall">fallback</p>
   }
-  return <p id="catchall">Hi {slug.join('/')}</p>
+  return <p id="catchall">Hi {slug.join(' ')}</p>
 }

test/integration/prerender/test/index.test.js

@@ -376,7 +376,7 @@ const runTests = (dev = false, looseMode = false) => {
           .text()
       ).isFallback
     ).toBe(false)
-    expect($('#catchall').text()).toMatch(/Hi.*?another\/value/)
+    expect($('#catchall').text()).toMatch(/Hi.*?another value/)
   })
 
   it('should support lazy catchall route', async () => {
@@ -405,6 +405,38 @@ const runTests = (dev = false, looseMode = false) => {
     }
   })
 
+  it('should support nested lazy catchall route', async () => {
+    // Dev doesn't support fallback yet
+    if (dev) {
+      const html = await renderViaHTTP(
+        appPort,
+        '/catchall/notreturnedinpaths/nested'
+      )
+      const $ = cheerio.load(html)
+      expect($('#catchall').text()).toMatch(/Hi.*?notreturnedinpaths nested/)
+    }
+    // Production will render fallback for a "lazy" route
+    else {
+      const html = await renderViaHTTP(
+        appPort,
+        '/catchall/notreturnedinpaths/nested'
+      )
+      const $ = cheerio.load(html)
+      expect($('#catchall').text()).toBe('fallback')
+
+      // hydration
+      const browser = await webdriver(appPort, '/catchall/delayby3s/nested')
+
+      const text1 = await browser.elementByCss('#catchall').text()
+      expect(text1).toBe('fallback')
+
+      await new Promise(resolve => setTimeout(resolve, 4000))
+
+      const text2 = await browser.elementByCss('#catchall').text()
+      expect(text2).toMatch(/Hi.*?delayby3s nested/)
+    }
+  })
+
   if (dev) {
     // TODO: re-enable when this is supported in dev
     // it('should show error when rewriting to dynamic SSG page', async () => {