A jscodeshift codemod library that we use at tune.

npm install -g jscodeshift
git clone https://github.com/AlexJuarez/tune-codemods.git
jscodeshift -t ./transforms/prefer-const <file>

• auto-unmock adds jest.unmock for all imports/ requires inside of files.
• chai-to-jasmine converts chai chain and should expressions to jest compatible jasmine.
• import-to-require converts all import statements to require statements.
• mocha-mix-to-enzyme replaces mochaMix a tune testing library with enzyme matchers.
• prefer-const converts let statements that are never reassigned to const.
• rm-empty-beforeEach removes empty beforeEach blocks.
• rm-unused-vars removes variableDeclarations that are never used in the file.
• sinon-to-jasmine-spy converts all sinon type spys to jasmine and jest
• sort-keys sorts all of the keys in object in ascending order.
• order-imports sorts all the imports by rules laid out in eslint-plugin-import/order
• global-return-to-export replaces top level return statements with export default