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Keats
Anyone using Jest? We are currently using Karma + Mocha + Chai and haven't felt the need to look in depth at Jest. We run our tests in Firefox and afaik Jest still doesn't support running tests in a browser. It was also really really slow when I tried it last year but I guess (hope?) it's better now
cpojer
The only thing that Jest has in common with Jest from a year ago is the name. We rewrote the entire framework incrementally (as all the blog posts on the Jest blog point out). We still do not support browser testing. We don't believe that it is critical for a unit testing framework and defer this form of testing to other tools at Facebook.

I am however interested in running Jest within Electron to provide better visual debugging while people are writing tests :)

was_boring
I use it, but only for personal projects. The distinct lack of configuration needed puts it far beyond Karma + Mocha + Chai in terms of ease of use.
Illniyar
I thought the "killer feature" for jest was auto module mocking, if that is no longer the centerpoint, what's the other features that should pull me to use it?
k__
they didn't remove it.

also, maybe snapshot testing?