test: refactor test for crypto cipher/decipher iv

Replace assert.equal with assert.strictEqual.
PR-URL: #9943
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: julianduque

test/parallel/test-crypto-cipheriv-decipheriv.js

@@ -22,7 +22,7 @@ function testCipher1(key, iv) {
 vartxt=decipher.update(ciph,'hex','utf8');
 txt+=decipher.final('utf8');
 
-assert.equal(txt,plaintext,'encryption and decryption with key and iv');
+assert.strictEqual(txt,plaintext,'encryption/decryption with key and iv');
 
 // streaming cipher interface
 // NB: In real life, it's not guaranteed that you can get all of it
@@ -36,7 +36,7 @@ function testCipher1(key, iv) {
 dStream.end(ciph);
 txt=dStream.read().toString('utf8');
 
-assert.equal(txt,plaintext,'streaming cipher iv');
+assert.strictEqual(txt,plaintext,'streaming cipher iv');
 }
 
 
@@ -54,7 +54,7 @@ function testCipher2(key, iv) {
 vartxt=decipher.update(ciph,'buffer','utf8');
 txt+=decipher.final('utf8');
 
-assert.equal(txt,plaintext,'encryption and decryption with key and iv');
+assert.strictEqual(txt,plaintext,'encryption/decryption with key and iv');
 }
 
 testCipher1('0123456789abcd0123456789','12345678');