fs: re-export constants from fs/promises

Author: F3n67u

lib/internal/fs/promises.js

@@ -17,13 +17,15 @@ const {
   Uint8Array,
 } = primordials;
 
+const { fs: constants } = internalBinding('constants');
 const {
   F_OK,
   O_SYMLINK,
   O_WRONLY,
   S_IFMT,
   S_IFREG
-} = internalBinding('constants').fs;
+} = constants;
+
 const binding = internalBinding('fs');
 const { Buffer } = require('buffer');
 

test/parallel/test-fs-promises-exists.js

@@ -2,5 +2,8 @@
 
 require('../common');
 const assert = require('assert');
+const fs = require('fs');
+const fsPromises = require('fs/promises');
 
-assert.strictEqual(require('fs/promises'), require('fs').promises);
+assert.strictEqual(fsPromises, fs.promises);
+assert.strictEqual(fsPromises.constants, fs.constants);