fs: fix promisified fs.readdir withFileTypes

PR-URL: #22832
Reviewed-By: Bryan English <bryan@bryanenglish.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

lib/internal/fs/promises.js

@@ -311,7 +311,8 @@ async function readdir(path, options) {
   path = toPathIfFileURL(path);
   validatePath(path);
   const result = await binding.readdir(pathModule.toNamespacedPath(path),
-                                       options.encoding, !!options.withTypes,
+                                       options.encoding,
+                                       !!options.withFileTypes,
                                        kUsePromises);
   return options.withFileTypes ?
     getDirectoryEntriesPromise(path, result) :

test/parallel/test-fs-readdir-types.js

@@ -57,6 +57,14 @@ fs.readdir(readdirDir, {
   assertDirents(dirents);
 }));
 
+// Check the promisified version
+assert.doesNotReject(async () => {
+  const dirents = await fs.promises.readdir(readdirDir, {
+    withFileTypes: true
+  });
+  assertDirents(dirents);
+});
+
 // Check for correct types when the binding returns unknowns
 const UNKNOWN = constants.UV_DIRENT_UNKNOWN;
 const oldReaddir = binding.readdir;