test: refactor test-crypto-ecb

* var -> const/let * IIFE to blocks PR-URL: #10029 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]>

Author: michael6

test/parallel/test-crypto-ecb.js

@@ -1,6 +1,6 @@
 'use strict';
-varcommon=require('../common');
-varassert=require('assert');
+constcommon=require('../common');
+constassert=require('assert');
 
 if(!common.hasCrypto){
 common.skip('missing crypto');
@@ -10,24 +10,25 @@ if (common.hasFipsCrypto){
 common.skip('BF-ECB is not FIPS 140-2 compatible');
 return;
 }
-varcrypto=require('crypto');
+constcrypto=require('crypto');
 
 crypto.DEFAULT_ENCODING='buffer';
 
 // Testing whether EVP_CipherInit_ex is functioning correctly.
 // Reference: bug#1997
 
-(function(){
-varencrypt=crypto.createCipheriv('BF-ECB','SomeRandomBlahz0c5GZVnR','');
-varhex=encrypt.update('Hello World!','ascii','hex');
+{
+constencrypt=
+crypto.createCipheriv('BF-ECB','SomeRandomBlahz0c5GZVnR','');
+lethex=encrypt.update('Hello World!','ascii','hex');
 hex+=encrypt.final('hex');
 assert.strictEqual(hex.toUpperCase(),'6D385F424AAB0CFBF0BB86E07FFB7D71');
-}());
+}
 
-(function(){
-vardecrypt=crypto.createDecipheriv('BF-ECB','SomeRandomBlahz0c5GZVnR',
-'');
-varmsg=decrypt.update('6D385F424AAB0CFBF0BB86E07FFB7D71','hex','ascii');
+{
+constdecrypt=
+crypto.createDecipheriv('BF-ECB','SomeRandomBlahz0c5GZVnR','');
+letmsg=decrypt.update('6D385F424AAB0CFBF0BB86E07FFB7D71','hex','ascii');
 msg+=decrypt.final('ascii');
 assert.strictEqual(msg,'Hello World!');
-}());
+}