fs: cover fs.opendir ERR_INVALID_CALLBACK

PR-URL: #30307
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-fs-opendir.js

@@ -86,6 +86,10 @@ assert.throws(function() {
   fs.opendirSync(__filename);
 }, /Error: ENOTDIR: not a directory/);
 
+assert.throws(function() {
+  fs.opendir(__filename);
+}, /TypeError \[ERR_INVALID_CALLBACK\]: Callback must be a function/);
+
 fs.opendir(__filename, common.mustCall(function(e) {
   assert.strictEqual(e.code, 'ENOTDIR');
 }));