test: simplify getCACertificates() and use common test helper

Author: haramj

test/parallel/test-tls-get-ca-certificates-x509-option.js

@@ -7,36 +7,29 @@ if (!common.hasCrypto)
 const assert = require('assert');
 const tls = require('tls');
 const { X509Certificate } = require('crypto');
+const tlsCommon = require('../common/tls');
 
 const expectedPems = tls.getCACertificates({ type: 'default', format: 'pem' });
 
 {
   const certs = tls.getCACertificates({ type: 'default', format: 'x509' });
   assert.strictEqual(certs.length, expectedPems.length);
 
-  for (let i = 0; i < certs.length; i++) {
-    const cert = certs[i];
-    const expected = new X509Certificate(expectedPems[i]);
+  const certsRaw = certs.map((c) => c.raw);
+  tlsCommon.assertEqualCerts(certsRaw, expectedPems);
 
+  for (const cert of certs) {
     assert.ok(cert instanceof X509Certificate);
-  
-    assert.strictEqual(cert.fingerprint, expected.fingerprint);
-    assert.strictEqual(cert.serialNumber, expected.serialNumber);
-    assert.strictEqual(cert.subject, expected.subject);
-    assert.strictEqual(cert.raw.toString('hex'), expected.raw.toString('hex'));
   }
 }
 
 {
   const certs = tls.getCACertificates({ type: 'default', format: 'buffer' });
   assert.strictEqual(certs.length, expectedPems.length);
+  tlsCommon.assertEqualCerts(certs, expectedPems);
 
-  for (let i = 0; i < certs.length; i++) {
-    const cert = certs[i];
-    const expected = new X509Certificate(expectedPems[i]);
-
+  for (const cert of certs) {
     assert.ok(Buffer.isBuffer(cert));
-    assert.strictEqual(cert.toString('hex'), expected.raw.toString('hex'));
   }
 }