node/test/parallel/test-child-process-promisified.js

'use strict';
const common = require('../common');
const assert = require('assert');
const child_process = require('child_process');
const { promisify } = require('util');

common.crashOnUnhandledRejection();

const exec = promisify(child_process.exec);
const execFile = promisify(child_process.execFile);

{
  exec(`${process.execPath} -p 42`).then(common.mustCall((obj) => {
    assert.deepStrictEqual(obj, { stdout: '42\n', stderr: '' });
  }));
}

{
  execFile(process.execPath, ['-p', '42']).then(common.mustCall((obj) => {
    assert.deepStrictEqual(obj, { stdout: '42\n', stderr: '' });
  }));
}

{
  exec('doesntexist').catch(common.mustCall((err) => {
    assert(err.message.includes('doesntexist'));
  }));
}

{
  execFile('doesntexist', ['-p', '42']).catch(common.mustCall((err) => {
    assert(err.message.includes('doesntexist'));
  }));
}