test: refactor test-http-dns-error

Replace var with const and use strictEqual(). PR-URL: #10062 Reviewed-By: Evan Lucas <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]>

Author: outsideris

test/parallel/test-http-dns-error.js

@@ -1,16 +1,16 @@
 'use strict';
-varcommon=require('../common');
-varassert=require('assert');
+constcommon=require('../common');
+constassert=require('assert');
 
-varhttp=require('http');
+consthttp=require('http');
 
 if(common.hasCrypto){
 varhttps=require('https');
 }else{
 common.skip('missing crypto');
 }
 
-varhost='*'.repeat(256);
+consthost='*'.repeat(256);
 
 functiondo_not_call(){
 thrownewError('This function should not have been called.');
@@ -20,15 +20,15 @@ function test(mod){
 
 // Bad host name should not throw an uncatchable exception.
 // Ensure that there is time to attach an error listener.
-varreq1=mod.get({host: host,port: 42},do_not_call);
+constreq1=mod.get({host: host,port: 42},do_not_call);
 req1.on('error',common.mustCall(function(err){
-assert.equal(err.code,'ENOTFOUND');
+assert.strictEqual(err.code,'ENOTFOUND');
 }));
 // http.get() called req1.end() for us
 
-varreq2=mod.request({method: 'GET',host: host,port: 42},do_not_call);
+constreq2=mod.request({method: 'GET',host: host,port: 42},do_not_call);
 req2.on('error',common.mustCall(function(err){
-assert.equal(err.code,'ENOTFOUND');
+assert.strictEqual(err.code,'ENOTFOUND');
 }));
 req2.end();
 }