jest.preset.js

const nxPreset = require('@nrwl/jest/preset').default;

module.exports = {
    ...nxPreset,
    extensionsToTreatAsEsm: ['.ts'],
    globals: {},
    moduleNameMapper: {
        '^(\\.{1,2}/.*)\\.js$': '$1',
    },
    /* TODO: Update to latest Jest snapshotFormat
     * By default Nx has kept the older style of Jest Snapshot formats
     * to prevent breaking of any existing tests with snapshots.
     * It's recommend you update to the latest format.
     * You can do this by removing snapshotFormat property
     * and running tests with --update-snapshot flag.
     * Example: "nx affected --targets=test --update-snapshot"
     * More info: https://jestjs.io/docs/upgrading-to-jest29#snapshot-format
     */
    snapshotFormat: { escapeString: true, printBasicPrototype: true },
};