lib: removed unnecessary fs.realpath `options` arg check + tests

Removed duplicated check for options argument of fs.realpath.

Added some tests which covering the cases for passing options arg
as null.

PR-URL: https://github.com/nodejs/node/pull/27909
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/lib/fs.js b/lib/fs.js
index 89f234b25d..e890d0c130 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -1533,11 +1533,9 @@ realpathSync.native = (path, options) => {
 
 function realpath(p, options, callback) {
   callback = typeof options === 'function' ? options : maybeCallback(callback);
-  if (!options)
-    options = emptyObj;
-  else
-    options = getOptions(options, emptyObj);
+  options = getOptions(options, {});
   p = toPathIfFileURL(p);
+
   if (typeof p !== 'string') {
     p += '';
   }