From 6d42c95acbb8b9377ae9c865d12bcb8c2c3373e5 Mon Sep 17 00:00:00 2001
From: Marie Terrier <marie.terrier1@gmail.com>
Date: Tue, 6 Nov 2018 17:37:47 +0100
Subject: [PATCH] test : add strict equal of identical objects not identical by
 reference

---
 test/parallel/test-assert-deep.js | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/test/parallel/test-assert-deep.js b/test/parallel/test-assert-deep.js
index 3a5fca74d4c287..ddbc5e78eafcaf 100644
--- a/test/parallel/test-assert-deep.js
+++ b/test/parallel/test-assert-deep.js
@@ -915,6 +915,27 @@ assert.deepStrictEqual(obj1, obj2);
   );
 }
 
+// Strict equal with identical objects that are not identical
+// by reference and longer than 30 elements
+// E.g., assert.deepStrictEqual({ a: Symbol() }, { a: Symbol() })
+{
+  const a = {};
+  const b = {};
+  for (let i = 0; i < 35; i++) {
+    a[`symbol${i}`] = Symbol();
+    b[`symbol${i}`] = Symbol();
+  }
+
+  assert.throws(
+    () => assert.deepStrictEqual(a, b),
+    {
+      code: 'ERR_ASSERTION',
+      name: 'AssertionError [ERR_ASSERTION]',
+      message: /\.\.\./g
+    }
+  );
+}
+
 // Basic valueOf check.
 {
   const a = new String(1);