joystream/pioneer/packages/joy-roles/jest.config.js

const { pathsToModuleNameMapper } = require('ts-jest/utils');
// In the following statement, replace `./tsconfig` with the path to your `tsconfig` file
// which contains the path mapping (ie the `compilerOptions.paths` option):
const { compilerOptions } = require('../../tsconfig.json');

module.exports = {
  "roots": [
    "<rootDir>/src"
  ],
  preset: 'ts-jest',
  testEnvironment: 'node',
  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths , { prefix: '<rootDir>/../../' }  ),
};