test: expand test-tls-get-ca-certificates-x509-option.js coverage

Author: haramj

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

@@ -13,8 +13,11 @@ const { X509Certificate } = require('crypto');
 
   assert.ok(Array.isArray(certs), 'should return an array');
   assert.ok(certs.length > 0, 'should return non-empty array');
-  assert.ok(certs[0] instanceof X509Certificate,
-            'each cert should be instance of X509Certificate');
+
+  for (let i = 0; i < certs.length; i++) {
+    assert.ok(certs[i] instanceof X509Certificate,
+              `cert at index ${i} should be instance of X509Certificate`);
+  }
 
   assert.match(certs[0].serialNumber, /^[0-9A-F]+$/i,
                'serialNumber should be hex string');
@@ -24,14 +27,22 @@ const { X509Certificate } = require('crypto');
   const certs = tls.getCACertificates({ type: 'default', as: 'buffer' });
   assert.ok(Array.isArray(certs));
   assert.ok(certs.length > 0);
-  assert.ok(Buffer.isBuffer(certs[0]));
+
+  for (let i = 0; i < certs.length; i++) {
+    assert.ok(Buffer.isBuffer(certs[i]),
+              `cert at index ${i} should be a Buffer`);
+  }
 }
 
 {
   const certs = tls.getCACertificates({ type: 'default' });
   assert.ok(Array.isArray(certs));
   assert.ok(certs.length > 0);
-  assert.ok(Buffer.isBuffer(certs[0]));
+
+  for (let i = 0; i < certs.length; i++) {
+    assert.ok(Buffer.isBuffer(certs[i]),
+              `cert at index ${i} should be a Buffer`);
+  }
 }
 
 {
@@ -48,7 +59,11 @@ const { X509Certificate } = require('crypto');
   const certs = tls.getCACertificates({ as: 'buffer' });
   assert.ok(Array.isArray(certs));
   assert.ok(certs.length > 0);
-  assert.ok(Buffer.isBuffer(certs[0]));
+
+  for (let i = 0; i < certs.length; i++) {
+    assert.ok(Buffer.isBuffer(certs[i]),
+              `cert at index ${i} should be a Buffer`);
+  }
 }
 
 {