Use jest instead of mocha/sinon/chai

[cilice]

Hey!

Another thing that I find worthy is to switch to jest instead of the mocha/sinon/chai trio.

Right now, old versions of sinon and mocha are used, with both being 2 major releases behind current. 😱

One big value which I find is that we would be able to generate source maps without much hassle, and having 1 dependency is somehow easier than having 3. There is also a generator that can convert the tests automatically to the jest syntax or with the 4 test files, I could convert them by hand.

Oh, and did I mention the test-runner of jest? it's pure love. <3

[jayphelps]

Right now, old versions of sinon and mocha are used, with both being 2 major releases behind current

These days I often take the "if it ain't broke don't fix it" stance to dependencies. They are indeed out of date, but I haven't noticed as far as lack of features or bugs so the effort hasn't been worth it for me.

Of course if someone else wants to do it, by all means! 😁

We do have greenkeeper setup, but I only use it because it will trigger a rebuild with those new updates and tell me if they would become breaking changes, so I can keep it in mind if/when I did every upgrade.

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As far as switching to Jest, I like (and use) Jest on some projects too. If you want to switch and there are no negatives you can think of, have at it! 👍

I've run into some minor things I didn't like about it, but I don't think they impact this project and even if they did they weren't dealbreakers.