readline: use `kEmptyObject`

PR-URL: https://github.com/nodejs/node/pull/43159
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

3 files changed, 18 insertions, 6 deletions

diff --git a/lib/internal/readline/interface.js b/lib/internal/readline/interface.js
index 47e5ca580a..457b67716c 100644
--- a/lib/internal/readline/interface.js
+++ b/lib/internal/readline/interface.js
@@ -48,6 +48,7 @@ const {
   validateString,
   validateUint32,
 } = require('internal/validators');
+const { kEmptyObject } = require('internal/util');
 const {
   inspect,
   getStringWidth,
@@ -1053,7 +1054,7 @@ class Interface extends InterfaceConstructor {
   // Handle a write from the tty
   [kTtyWrite](s, key) {
     const previousKey = this[kPreviousKey];
-    key = key || {};
+    key = key || kEmptyObject;
     this[kPreviousKey] = key;
 
     if (!key.meta || key.name !== 'y') {
diff --git a/lib/readline.js b/lib/readline.js
index 82afaa285d..26e277c7ab 100644
--- a/lib/readline.js
+++ b/lib/readline.js
@@ -47,7 +47,10 @@ const {
 const {
   inspect,
 } = require('internal/util/inspect');
-const { promisify } = require('internal/util');
+const {
+  kEmptyObject,
+  promisify,
+} = require('internal/util');
 const { validateAbortSignal } = require('internal/validators');
 
 /**
@@ -128,7 +131,9 @@ const superQuestion = _Interface.prototype.question;
  */
 Interface.prototype.question = function(query, options, cb) {
   cb = typeof options === 'function' ? options : cb;
-  options = typeof options === 'object' && options !== null ? options : {};
+  if (options === null || typeof options !== 'object') {
+    options = kEmptyObject;
+  }
 
   if (options.signal) {
     validateAbortSignal(options.signal, 'options.signal');
@@ -154,7 +159,9 @@ Interface.prototype.question = function(query, options, cb) {
   }
 };
 Interface.prototype.question[promisify.custom] = function question(query, options) {
-  options = typeof options === 'object' && options !== null ? options : {};
+  if (options === null || typeof options !== 'object') {
+    options = kEmptyObject;
+  }
 
   if (options.signal && options.signal.aborted) {
     return PromiseReject(
@@ -457,7 +464,7 @@ Interface.prototype._moveCursor = _Interface.prototype[kMoveCursor];
 Interface.prototype._ttyWrite = _Interface.prototype[kTtyWrite];
 
 function _ttyWriteDumb(s, key) {
-  key = key || {};
+  key = key || kEmptyObject;
 
   if (key.name === 'escape') return;
 
diff --git a/lib/readline/promises.js b/lib/readline/promises.js
index 534558ec31..728a6253fd 100644
--- a/lib/readline/promises.js
+++ b/lib/readline/promises.js
@@ -18,12 +18,16 @@ const {
 } = require('internal/errors');
 const { validateAbortSignal } = require('internal/validators');
 
+const {
+  kEmptyObject,
+} = require('internal/util');
+
 class Interface extends _Interface {
   // eslint-disable-next-line no-useless-constructor
   constructor(input, output, completer, terminal) {
     super(input, output, completer, terminal);
   }
-  question(query, options = {}) {
+  question(query, options = kEmptyObject) {
     return new Promise((resolve, reject) => {
       let cb = resolve;