I saw that there was a talk on Twitter at the Dev Summit on Unit testing with Web App Builder and the JS API.  I wasn't able to attend, but I have been googling for more information.  I came across 2 videos in Google that have been pulled from the ESRI video site.  Anyone know where I can find more information?  Or if more information is coming soon with post-summit follow up??  
Yes - I know about this: https://developers.arcgis.com/web-appbuilder/guide/best-practices-unit-test.htm
and I searched ESRI's website, including training.
Google search result:
