test: added test for generateKeyPair

PR-URL: #23541
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

test/parallel/test-crypto-keygen.js

@@ -358,6 +358,16 @@ function convertDERToPEM(label, der) {
   });
 }
 
+{
+  // Test keygen without options object.
+  common.expectsError(() => generateKeyPair('rsa', common.mustNotCall()), {
+    type: TypeError,
+    code: 'ERR_INVALID_ARG_TYPE',
+    message: 'The "options" argument must be of ' +
+      'type object. Received type undefined'
+  });
+}
+
 {
   // Missing / invalid publicKeyEncoding.
   for (const enc of [undefined, null, 0, 'a', true]) {