test: replace closure with arrow functions

PR-URL: #24438 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Ouyang Yadong <[email protected]> Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>

Author: Amanpreet-03

test/parallel/test-stream2-readable-empty-buffer-no-eof.js

@@ -46,17 +46,17 @@ function test1(){
 r._read=function(n){
 switch(reads--){
 case5:
-returnsetImmediate(function(){
+returnsetImmediate(()=>{
 returnr.push(buf);
 });
 case4:
-setImmediate(function(){
+setImmediate(()=>{
 returnr.push(Buffer.alloc(0));
 });
 returnsetImmediate(r.read.bind(r,0));
 case3:
 setImmediate(r.read.bind(r,0));
-returnprocess.nextTick(function(){
+returnprocess.nextTick(()=>{
 returnr.push(Buffer.alloc(0));
 });
 case2:
@@ -78,12 +78,12 @@ function test1(){
 results.push(String(chunk));
 }
 r.on('readable',flow);
-r.on('end',function(){
+r.on('end',()=>{
 results.push('EOF');
 });
 flow();
 
-process.on('exit',function(){
+process.on('exit',()=>{
 assert.deepStrictEqual(results,['xxxxx','xxxxx','EOF']);
 console.log('ok');
 });
@@ -106,12 +106,12 @@ function test2(){
 results.push(String(chunk));
 }
 r.on('readable',flow);
-r.on('end',function(){
+r.on('end',()=>{
 results.push('EOF');
 });
 flow();
 
-process.on('exit',function(){
+process.on('exit',()=>{
 assert.deepStrictEqual(results,['eHh4','eHg=','EOF']);
 console.log('ok');
 });