Add test for sandboxes with index.html not in root

Author: CompuIves

generate-test-screenshots.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 docker run --rm --name test-container -v $(pwd):/home/circleci/codesandbox-client -w /home/circleci/codesandbox-client -d -t codesandbox/node-puppeteer yarn start:test && \
-sleep 6 && docker exec -it test-container yarn test:integrations && \
-docker stop test-container
+sleep 50 && docker exec -it test-container yarn test:integrations && \
+docker stop test-container

packages/app/integration-tests/tests/__image_snapshots__/4888omqqz7-snap.png

@@ -36,6 +36,7 @@ const SANDBOXES = [
   '31kn7voz4q', // cxjs
   'zw9zjy0683', // aurelia
   'zx22owojr3', // vue v-slot test
+  '4888omqqz7', // material-ui https://github.com/CompuIves/codesandbox-client/issues/1741
 ];
 
 function pageLoaded(page) {

packages/app/integration-tests/tests/sandboxes.test.js

@@ -557,7 +557,11 @@ async function compile({
           manager.clearCompiledCache();
         }
 
-        if (!manager.preset.htmlDisabled || !firstLoad) {
+        if (
+          !manager.preset.htmlDisabled ||
+          !firstLoad ||
+          process.env.LOCAL_SERVER
+        ) {
           // The HTML is loaded from the server as a static file, no need to set the innerHTML of the body
           // on the first run.
           document.body.innerHTML = body;