Allow more control over jest configuration

As stated in https://github.com/AnomalyInnovations/serverless-bundle/issues/55#issuecomment-588051621 – the current way the configuration for jest is built, based on the create-react-app model, is very restrictive. There are many options it would be nice to have available when running npm test from serverless-bundle. For example, verbose and bail are two I use frequently, but they are not available in the list of supported options.

Currently, serverless-bundle allows more control over users eslint configurations by honoring an .eslintrc file (or any of the permutations) in the root directory. Maybe it would be possible to also honor a jest.config.js file, if it exists.

Thanks!

[jeff-kilbride]

Honestly, another idea would be to add the rest (or majority) of the jest configuration options to the list of supportedKeys in the current createJestConfig.js. I don’t think the way you’re doing it, right now, is necessarily bad – just too restrictive. There are lots of options that could be supported, just by extending that list of supportedKeys.

[mattxwang]

Hey, just wanted to circle back on this issue - @jayair did you have a chance to take a peek at different projects implementations?

Honestly, another idea would be to add the rest (or majority) of the jest configuration options to the list of supportedKeys in the current createJestConfig.js

In the meantime, I’m more than happy to submit a quick PR here - Create React App has updated their list of supportedKeys since the one in this repo was created, so more than happy to start from there. I’m personally looking to add restoreMocks if possible!