fix: util.promisify(setTimeout)

lib/common/init.js

@@ -1,4 +1,5 @@
 const timers = require('timers')
+const util = require('util')
 
 process.atomBinding = require('./atom-binding-setup')(process.binding, process.type)
 
@@ -28,6 +29,12 @@ if (process.type === 'browser') {
   // recalculate the timeout in browser process.
   global.setTimeout = wrapWithActivateUvLoop(timers.setTimeout)
   global.setInterval = wrapWithActivateUvLoop(timers.setInterval)
+
+  global.setTimeout[util.promisify.custom] = function (timeout) {
+    return new Promise(resolve => {
+      global.setTimeout(resolve, timeout)
+    })
+  }
 }
 
 if (process.platform === 'win32') {

spec/node-spec.js

@@ -179,6 +179,10 @@ describe('node feature', () => {
       it('can be scheduled in time', (done) => {
         remote.getGlobal('setTimeout')(done, 0)
       })
+
+      it('can be promisified', (done) => {
+        remote.getGlobal('setTimeoutPromisified')(0).then(done)
+      })
     })
 
     describe('setInterval called under Chromium event loop in browser process', () => {

spec/static/main.js

@@ -79,6 +79,8 @@ ipcMain.on('echo', function (event, msg) {
   event.returnValue = msg
 })
 
+global.setTimeoutPromisified = util.promisify(setTimeout)
+
 const coverage = new Coverage({
   outputPath: path.join(__dirname, '..', '..', 'out', 'coverage')
 })