11   const promise = exec(`${process.execPath} -p 42`);  constant
13   assert(promise.child instanceof child_process.ChildProcess);
14   promise.then(common.mustCall((obj) => {
20   const promise = execFile(process.execPath, ['-p', '42']);  constant
22   assert(promise.child instanceof child_process.ChildProcess);
23   promise.then(common.mustCall((obj) => {
29   const promise = exec('doesntexist');  constant
31   assert(promise.child instanceof child_process.ChildProcess);
32   promise.catch(common.mustCall((err) => {
38   const promise = execFile('doesntexist', ['-p', '42']);  constant
40   assert(promise.child instanceof child_process.ChildProcess);
41   promise.catch(common.mustCall((err) => {