test: replace callback with arrow functions

PR-URL: #24490 Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Franziska Hinkelmann <[email protected]> Reviewed-By: Sakthipriyan Vairamani <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]>

Author: sreepurnajasti

test/pummel/test-keep-alive.js

@@ -32,7 +32,7 @@ const http = require('http');
 consturl=require('url');
 
 constbody='hello world\n';
-constserver=http.createServer(function(req,res){
+constserver=http.createServer((req,res)=>{
 res.writeHead(200,{
 'Content-Length': body.length,
 'Content-Type': 'text/plain'
@@ -45,7 +45,7 @@ let keepAliveReqSec = 0;
 letnormalReqSec=0;
 
 
-functionrunAb(opts,callback){
+construnAb=(opts,callback)=>{
 constargs=[
 '-c',opts.concurrent||100,
 '-t',opts.threads||2,
@@ -66,11 +66,9 @@ function runAb(opts, callback){
 
 letstdout;
 
-child.stdout.on('data',function(data){
-stdout+=data;
-});
+child.stdout.on('data',(data)=>stdout+=data);
 
-child.on('close',function(code,signal){
+child.on('close',(code,signal)=>{
 if(code){
 console.error(code,signal);
 process.exit(code);
@@ -90,20 +88,20 @@ function runAb(opts, callback){
 
 callback(reqSec,keepAliveRequests);
 });
-}
+};
 
 server.listen(common.PORT,()=>{
 runAb({keepalive: true},(reqSec)=>{
 keepAliveReqSec=reqSec;
 
-runAb({keepalive: false},function(reqSec){
+runAb({keepalive: false},(reqSec)=>{
 normalReqSec=reqSec;
 server.close();
 });
 });
 });
 
-process.on('exit',function(){
+process.on('exit',()=>{
 assert.strictEqual(
 normalReqSec>50,
 true,