test: refactor test-beforeexit-event

- replaced var with const/let. - removed all console.log() statements. - removed deaths and revivals vars. - wrapped beforexit listener callbacks with common.mustCall(). - removed exit event listener. PR-URL: #10121 Reviewed-By: Jeremiah Senkpiel <[email protected]> Reviewed-By: Brian White <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michael Dawson <[email protected]>

Author: radelmann

test/parallel/test-beforeexit-event.js

@@ -1,42 +1,26 @@
 'use strict';
-require('../common');
-varassert=require('assert');
-varnet=require('net');
-varrevivals=0;
-vardeaths=0;
+constcommon=require('../common');
+constnet=require('net');
 
-process.on('beforeExit',function(){deaths++;});
-
-process.once('beforeExit',tryImmediate);
+process.once('beforeExit',common.mustCall(tryImmediate));
 
 functiontryImmediate(){
-console.log('set immediate');
-setImmediate(function(){
-revivals++;
-process.once('beforeExit',tryTimer);
-});
+setImmediate(common.mustCall(()=>{
+process.once('beforeExit',common.mustCall(tryTimer));
+}));
 }
 
 functiontryTimer(){
-console.log('set a timeout');
-setTimeout(function(){
-console.log('timeout cb, do another once beforeExit');
-revivals++;
-process.once('beforeExit',tryListen);
-},1);
+setTimeout(common.mustCall(()=>{
+process.once('beforeExit',common.mustCall(tryListen));
+}),1);
 }
 
 functiontryListen(){
-console.log('create a server');
 net.createServer()
 .listen(0)
-.on('listening',function(){
-revivals++;
+.on('listening',common.mustCall(function(){
 this.close();
-});
+process.on('beforeExit',common.mustCall(()=>{}));
+}));
 }
-
-process.on('exit',function(){
-assert.strictEqual(4,deaths);
-assert.strictEqual(3,revivals);
-});