test: Use common.mustCall in http test

PR-URL: #17487 Refs: #17169 Reviewed-By: Jon Moss <[email protected]> Reviewed-By: Anatoli Papirovski <[email protected]>

Author: sreepurnajasti

test/parallel/test-http-pipeline-regr-2639.js

@@ -1,33 +1,24 @@
 'use strict';
-require('../common');
-constassert=require('assert');
+constcommon=require('../common');
 consthttp=require('http');
 constnet=require('net');
 
 constCOUNT=10;
 
-letreceived=0;
-
-constserver=http.createServer(function(req,res){
+constserver=http.createServer(common.mustCall((req,res)=>{
 // Close the server, we have only one TCP connection anyway
-if(received++===0)
-server.close();
-
+server.close();
 res.writeHead(200);
 res.write('data');
 
 setTimeout(function(){
 res.end();
 },(Math.random()*100)|0);
-}).listen(0,function(){
+},COUNT)).listen(0,function(){
 consts=net.connect(this.address().port);
 
 constbig='GET / HTTP/1.0\r\n\r\n'.repeat(COUNT);
 
 s.write(big);
 s.resume();
 });
-
-process.on('exit',function(){
-assert.strictEqual(received,COUNT);
-});