E2e wait for notebook3 (#2199)

* puppeteer fails if going to fast to the next timestamp

* set a default value

Author: sanderegg

tests/e2e/tutorials/jupyters.js

@@ -42,10 +42,11 @@ async function runTutorial() {
 
     // inside the iFrame, open the first notebook
     const notebookCBSelector = '#notebook_list > div:nth-child(2) > div > input[type=checkbox]';
-    await utils.waitAndClick(nbIframe, notebookCBSelector)
+    await utils.waitAndClick(nbIframe, notebookCBSelector);
     const notebookViewSelector = "#notebook_toolbar > div.col-sm-8.no-padding > div.dynamic-buttons > button.view-button.btn.btn-default.btn-xs"
-    await utils.waitAndClick(nbIframe, notebookViewSelector)
-
+    await utils.waitAndClick(nbIframe, notebookViewSelector);
+    console.log("notebook iframe found");
+    await tutorial.waitFor(5000);
 
     // inside the first notebook, click Run all button
     const cellMenuSelector = '#menus > div > div > ul > li:nth-child(5) > a'

tests/e2e/utils/utils.js

@@ -300,7 +300,7 @@ async function waitForValidOutputFile(page) {
   })
 }
 
-async function waitAndClick(page, id, timeout) {
+async function waitAndClick(page, id, timeout = null) {
   await page.waitForSelector(id, {
     timeout: (timeout ? timeout : 30000) // default 30s
   });