I think we are using like 3 different testing frameworks and would like to move to use the same one for all projects? I believe the team agreed with choosing jest a good base (and is possible since we have dropped node 0.10/0.12 in 7.0).

Not sure how difficult this is but shouldn't be too bad and we can help.

• Comment below you are going to do this (for others to know)
• Read CONTRIBUTING.md
• Check you are on 7.0 branch with git checkout 7.0 and then make a branch off of that to PR
• Join our slack if you haven't already if you need more immediate help or just comment in this issue/PR
• modify dependencies https://github.com/babel/babel/blob/7.0/package.json#L41
• modify options https://github.com/babel/babel/tree/7.0/test
• each package in babel/packages/* has a test directory
  • might be a bit tricky but you can test with make test-only or TEST_GREP=transformation make test for a subset
  • https://github.com/babel/babel/tree/7.0/packages/babel-cli/test figure out if anything needs to be converted.