jupyterlab/jest.config.js

const func = require('@jupyterlab/testutils/lib/jest-config');
const upstream = func(__dirname);

let local = {
  preset: 'ts-jest/presets/js-with-babel',
  transformIgnorePatterns: ['/node_modules/(?!(@jupyterlab/.*)/)'],
  globals: {
    'ts-jest': {
      tsConfig: './tsconfig.test.json'
    }
  },
  transform: {
    '\\.(ts|tsx)?$': 'ts-jest',
    '\\.svg$': 'jest-raw-loader'
  }
};

Object.keys(local).forEach(option => {
  upstream[option] = local[option];
});

module.exports = upstream;