From 3a09b40b6eb1f493d22ca4a05f54d5e21f542a25 Mon Sep 17 00:00:00 2001
From: Timo Tijhof <krinkle@fastmail.com>
Date: Wed, 24 Jul 2024 23:03:00 +0100
Subject: [PATCH] Test: Add equiv test for two sets containing the same by-ref
 array

Inspired by https://github.com/nodejs/node/issues/53423.
Already works here, but might as well cover it going forward.
---
 test/main/deepEqual.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/test/main/deepEqual.js b/test/main/deepEqual.js
index 5cf50451d..a384fc617 100644
--- a/test/main/deepEqual.js
+++ b/test/main/deepEqual.js
@@ -1849,7 +1849,7 @@ QUnit.test.if('Sets', hasES6Set, function (assert) {
   s2 = new Set([2, 3]);
   assert.equal(QUnit.equiv(s1, s2), false, "Sets can 'short-circuit' for early failure");
 
-  // Sets Containing objects
+  // Sets containing the same by-ref objects
   o1 = { foo: 0, bar: true };
   o2 = { foo: 0, bar: true };
   o3 = { foo: 1, bar: true };
@@ -1867,6 +1867,13 @@ QUnit.test.if('Sets', hasES6Set, function (assert) {
   s2 = new Set([o3]);
   assert.equal(QUnit.equiv(s1, s2), false, 'Sets containing different objects');
 
+  // Sets containing the same by-ref array
+  // Inspired by https://github.com/nodejs/node/issues/53423
+  var a1 = ['x'];
+  s1 = new Set([a1, ['y']]);
+  s2 = new Set([a1, ['y']]);
+  assert.equal(QUnit.equiv(s1, s2), true, 'Sets containing the same by-ref array');
+
   // Sets containing sets
   s1 = new Set([1, 2, 3]);
   s2 = new Set([1, 2, 3]);