Mock a few functions in a module with many exports (Jest 22)

mock.js

// file __mocks__/selectors.js
// this file mocks the selectors.js module

const actual = require.requireActual('../selectors')
const mockBase = jest.genMockFromModule('../selectors');

// eslint-disable-next-line security/detect-object-injection,no-return-assign
Object.keys(actual).forEach(key => (mockBase[key] = actual[key]));

mockBase.getCountry = jest.fn(); 
mockBase.getUser = jest.fn();

module.exports = mockBase;

test.js

jest.mock('../../selectors'); // this will be hoisted to top of file if you use babel-jest (22)

import { getOrders, getLanguage, getUser, getCountry } from '../../selectors';

// verify your mocks are mocked and your functions are not 
expect(getOrders.mock).toBeFalsy()
expect(getLanguage.mock).toBeFalsy()
expect(getCountry.mock).toBeTruthy()
expect(getUser.mock).toBeTruthy()

// describe and test blocks here