ts-jest/preprocessor.js

A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript

console.warn(
  'ts-jest[main] (WARN) Replace any occurrences of "ts-jest/dist/preprocessor.js" or ' +
    ' "<rootDir>/node_modules/ts-jest/preprocessor.js"' +
    ' in the \'transform\' section of your Jest config with just "ts-jest".'
)

module.exports = require('./dist')