test: replace function with arrow function

Replace some classic functions with arrow functions in test-child-process-send-cb.js PR-URL: #17312 Reviewed-By: Ron Korving <[email protected]> Reviewed-By: Vse Mozhet Byt <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Daijiro Wachi <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: Jon Moss <[email protected]> Reviewed-By: James M Snell <[email protected]>

Author: spring_raining

test/parallel/test-child-process-send-cb.js

@@ -4,15 +4,15 @@ const assert = require('assert');
 constfork=require('child_process').fork;
 
 if(process.argv[2]==='child'){
-process.send('ok',common.mustCall(function(err){
+process.send('ok',common.mustCall((err)=>{
 assert.strictEqual(err,null);
 }));
 }else{
 constchild=fork(process.argv[1],['child']);
-child.on('message',common.mustCall(function(message){
+child.on('message',common.mustCall((message)=>{
 assert.strictEqual(message,'ok');
 }));
-child.on('exit',common.mustCall(function(exitCode,signalCode){
+child.on('exit',common.mustCall((exitCode,signalCode)=>{
 assert.strictEqual(exitCode,0);
 assert.strictEqual(signalCode,null);
 }));