test/parallel/test-module-main-extension-lookup.js

'use strict';
require('../common');
const fixtures = require('../common/fixtures');
const { execFileSync } = require('child_process');

const node = process.argv[0];

execFileSync(node, [fixtures.path('es-modules', 'test-esm-ok.mjs')]);
execFileSync(node, [fixtures.path('es-modules', 'noext')]);