During SenchaCon 2010, Sencha presented Behavior Driven Testing with Jasmine

But more useful, they presented Visual QA under Introducing Ext JS 4

If I recall well, they told us they will give it to the community. The assertion is based on comparing images.

A direct competitor of Ext JS mentions in its features list custom support for Selenium. I was surprised, someone has realized testing is part of development!

I'm wondering what people are using and what Sencha is recommending and supporting.