test: replace function with arrow function and remove unused argument

PR-URL: #38235
Reviewed-By: Yash Ladha <yash@yashladha.in>
Reviewed-By: Pooja D P <Pooja.D.P@ibm.com>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: andresatencio

test/parallel/test-readline-interface.js

@@ -248,7 +248,7 @@ function assertCursorRowsAndCols(rli, rows, cols) {
 constexpectedLines=['foo','bar','baz','bar','bat','bat'];
 // ['foo', 'baz', 'bar', bat'];
 letcallCount=0;
-rli.on('line',function(line){
+rli.on('line',(line)=>{
 assert.strictEqual(line,expectedLines[callCount]);
 callCount++;
 });
@@ -324,7 +324,7 @@ function assertCursorRowsAndCols(rli, rows, cols) {
 });
 constexpectedLines=['foo','bar','baz','bar','bat','bat'];
 letcallCount=0;
-rli.on('line',function(line){
+rli.on('line',(line)=>{
 assert.strictEqual(line,expectedLines[callCount]);
 callCount++;
 });
@@ -351,7 +351,7 @@ function assertCursorRowsAndCols(rli, rows, cols) {
 const[rli,fi]=getInterface({terminal: true});
 constkeys=[];
 consterr=newError('bad thing happened');
-fi.on('keypress',function(key){
+fi.on('keypress',(key)=>{
 keys.push(key);
 if(key==='X'){
 throwerr;
@@ -766,7 +766,7 @@ for (let i = 0; i < 12; i++) {
 assert.strictEqual(isWarned(process.stdout._events),false);
 }
 
-[true,false].forEach(function(terminal){
+[true,false].forEach((terminal)=>{
 // Disable history
 {
 const[rli,fi]=getInterface({ terminal,historySize: 0});
@@ -861,7 +861,7 @@ for (let i = 0; i < 12; i++) {
 constbuf=Buffer.from('☮','utf8');
 const[rli,fi]=getInterface({ terminal });
 letcallCount=0;
-rli.on('line',function(line){
+rli.on('line',(line)=>{
 callCount++;
 assert.strictEqual(line,buf.toString('utf8'));
 });
@@ -905,7 +905,7 @@ for (let i = 0; i < 12; i++) {
 rli.setPrompt('ddd> ');
 rli.prompt();
 rli.write("really shouldn't be seeing this");
-rli.question('What do you think of node.js? ',function(answer){
+rli.question('What do you think of node.js? ',(answer)=>{
 console.log('Thank you for your valuable feedback:',answer);
 rli.close();
 });
@@ -957,7 +957,7 @@ for (let i = 0; i < 12; i++) {
 constcrlfDelay=200;
 const[rli,fi]=getInterface({ terminal, crlfDelay });
 letcallCount=0;
-rli.on('line',function(line){
+rli.on('line',()=>{
 callCount++;
 });
 fi.emit('data','\r');
@@ -979,7 +979,7 @@ for (let i = 0; i < 12; i++) {
 constdelay=200;
 const[rli,fi]=getInterface({ terminal, crlfDelay });
 letcallCount=0;
-rli.on('line',function(line){
+rli.on('line',()=>{
 callCount++;
 });
 fi.emit('data','\r');