import { extractFromObj } from './extractFromObj'; test('It should correctly extract values', function () { const o = { a: 1, b: 2 }; expect(extractFromObj(o, ['a'])).toEqual({ a: 1 }); }); test('It should correctly extract more complex structure', function () { const o = { a: { bob: 1, steve: 2 }, b: 2 }; expect(extractFromObj(o, ['a'])).toEqual({ a: { bob: 1, steve: 2 } }); });