From 3031027894ce259d06c551f956c2c7bab414c6fa Mon Sep 17 00:00:00 2001
From: Carl-Erik Kopseng <carlerik@gmail.com>
Date: Mon, 9 Mar 2020 13:39:39 +0100
Subject: [PATCH] Add custom prop isOwn to descriptor

Makes it possible to see if the descriptor
originates from the object or its prototype chain
---
 lib/sinon/util/core/get-property-descriptor.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/sinon/util/core/get-property-descriptor.js b/lib/sinon/util/core/get-property-descriptor.js
index 8dd3dc830..9625fd355 100644
--- a/lib/sinon/util/core/get-property-descriptor.js
+++ b/lib/sinon/util/core/get-property-descriptor.js
@@ -3,9 +3,15 @@
 module.exports = function getPropertyDescriptor(object, property) {
     var proto = object;
     var descriptor;
+    var isOwn = object && Object.getOwnPropertyDescriptor(object, property);
 
     while (proto && !(descriptor = Object.getOwnPropertyDescriptor(proto, property))) {
         proto = Object.getPrototypeOf(proto);
     }
+
+    if (descriptor) {
+        descriptor.isOwn = isOwn;
+    }
+
     return descriptor;
 };