fs: fix fsPromises.lchmod error on non-Mac

On non-macOS, fsPromises.lchmod throws AssertionError.
Expected behavior is `Error [ERR_METHOD_NOT_IMPLEMENTED]`.
`ERR_METHOD_NOT_IMPLEMENTED()` requires argument, but it wasn't set.

Fixes `ERR_METHOD_NOT_IMPLEMENTED()` to
`ERR_METHOD_NOT_IMPLEMENTED('lchmod()')`.

PR-URL: #21435
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Weijia Wang <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>

Author: Masashi Hirano

lib/internal/fs/promises.js

@@ -371,7 +371,7 @@ async function chmod(path, mode) {
 
 async function lchmod(path, mode) {
   if (O_SYMLINK === undefined)
-    throw new ERR_METHOD_NOT_IMPLEMENTED();
+    throw new ERR_METHOD_NOT_IMPLEMENTED('lchmod()');
 
   const fd = await open(path, O_WRONLY | O_SYMLINK);
   return fchmod(fd, mode).finally(fd.close.bind(fd));

test/parallel/test-fs-promises.js

@@ -140,15 +140,26 @@ function verifyStatObject(stat) {
                          (await realpath(newLink)).toLowerCase());
       assert.strictEqual(newPath.toLowerCase(),
                          (await readlink(newLink)).toLowerCase());
+
+      const newMode = 0o666;
       if (common.isOSX) {
         // lchmod is only available on macOS
-        const newMode = 0o666;
         await lchmod(newLink, newMode);
         stats = await lstat(newLink);
         assert.strictEqual(stats.mode & 0o777, newMode);
+      } else {
+        await Promise.all([
+          assert.rejects(
+            lchmod(newLink, newMode),
+            common.expectsError({
+              code: 'ERR_METHOD_NOT_IMPLEMENTED',
+              type: Error,
+              message: 'The lchmod() method is not implemented'
+            })
+          )
+        ]);
       }
 
-
       await unlink(newLink);
     }