test: refactor test-repl-mode.js

* var -> const/let
* assert.equal() -> assert.strictEqual()
PR-URL: #10061
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

Author: cesarhq

test/parallel/test-repl-mode.js

@@ -1,12 +1,12 @@
 'use strict';
-varcommon=require('../common');
-varassert=require('assert');
-varStream=require('stream');
-varrepl=require('repl');
+constcommon=require('../common');
+constassert=require('assert');
+constStream=require('stream');
+constrepl=require('repl');
 
 common.globalCheck=false;
 
-vartests=[
+consttests=[
 testSloppyMode,
 testStrictMode,
 testAutoMode
@@ -17,12 +17,12 @@ tests.forEach(function(test) {
 });
 
 functiontestSloppyMode(){
-varcli=initRepl(repl.REPL_MODE_SLOPPY);
+constcli=initRepl(repl.REPL_MODE_SLOPPY);
 
 cli.input.emit('data',`
  x = 3
  `.trim()+'\n');
-assert.equal(cli.output.accumulator.join(''),'> 3\n> ');
+assert.strictEqual(cli.output.accumulator.join(''),'> 3\n> ');
 cli.output.accumulator.length=0;
 
 cli.input.emit('data',`
@@ -33,7 +33,7 @@ function testSloppyMode() {
 }
 
 functiontestStrictMode(){
-varcli=initRepl(repl.REPL_MODE_STRICT);
+constcli=initRepl(repl.REPL_MODE_STRICT);
 
 cli.input.emit('data',`
  x = 3
@@ -45,30 +45,30 @@ function testStrictMode() {
 cli.input.emit('data',`
  let y = 3
  `.trim()+'\n');
-assert.equal(cli.output.accumulator.join(''),'undefined\n> ');
+assert.strictEqual(cli.output.accumulator.join(''),'undefined\n> ');
 }
 
 functiontestAutoMode(){
-varcli=initRepl(repl.REPL_MODE_MAGIC);
+constcli=initRepl(repl.REPL_MODE_MAGIC);
 
 cli.input.emit('data',`
  x = 3
  `.trim()+'\n');
-assert.equal(cli.output.accumulator.join(''),'> 3\n> ');
+assert.strictEqual(cli.output.accumulator.join(''),'> 3\n> ');
 cli.output.accumulator.length=0;
 
 cli.input.emit('data',`
  let y = 3
  `.trim()+'\n');
-assert.equal(cli.output.accumulator.join(''),'undefined\n> ');
+assert.strictEqual(cli.output.accumulator.join(''),'undefined\n> ');
 }
 
 functioninitRepl(mode){
-varinput=newStream();
+constinput=newStream();
 input.write=input.pause=input.resume=function(){};
 input.readable=true;
 
-varoutput=newStream();
+constoutput=newStream();
 output.write=output.pause=output.resume=function(buf){
 output.accumulator.push(buf);
 };