test: refactor test-tls-friendly-error-message.js

Replaces var with const and adds common.mustCall(). PR-URL: #9967 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]>

Author: edsadr

test/parallel/test-tls-friendly-error-message.js

@@ -1,26 +1,26 @@
 'use strict';
-varcommon=require('../common');
-varassert=require('assert');
+constcommon=require('../common');
+constassert=require('assert');
 
 if(!common.hasCrypto){
 common.skip('missing crypto');
 return;
 }
-vartls=require('tls');
+consttls=require('tls');
 
-varfs=require('fs');
+constfs=require('fs');
 
-varkey=fs.readFileSync(common.fixturesDir+'/keys/agent1-key.pem');
-varcert=fs.readFileSync(common.fixturesDir+'/keys/agent1-cert.pem');
+constkey=fs.readFileSync(common.fixturesDir+'/keys/agent1-key.pem');
+constcert=fs.readFileSync(common.fixturesDir+'/keys/agent1-cert.pem');
 
-tls.createServer({key: key,cert: cert},function(conn){
+tls.createServer({key: key,cert: cert},common.mustCall(function(conn){
 conn.end();
 this.close();
-}).listen(0,function(){
+})).listen(0,common.mustCall(function(){
 varoptions={port: this.address().port,rejectUnauthorized: true};
 tls.connect(options).on('error',common.mustCall(function(err){
-assert.equal(err.code,'UNABLE_TO_VERIFY_LEAF_SIGNATURE');
-assert.equal(err.message,'unable to verify the first certificate');
+assert.strictEqual(err.code,'UNABLE_TO_VERIFY_LEAF_SIGNATURE');
+assert.strictEqual(err.message,'unable to verify the first certificate');
 this.destroy();
 }));
-});
+}));