I'm a big fan of Jest - if you're using Jest with Visual Studios Code, I'd recommend looking at my extension that gives you a mode IDE-like experience.
Thank you for this! I've been patiently waiting for someone more motivated and intelligent than myself to create a free inline test runner. You are my hero. Keep the project open source, free, and plop a donations button on the page and I'll be quick to open my wallet.
Tried it for the first time yesterday. It is pretty amazing and the productivity boost is crazy (it's one of those tools that changes the balance when you ask if testing is worth the time or not).