nodejs
diff --git a/Collapse file
‎test/parallel/test-assert-deep.js‎
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+21Lines changed: 21 additions & 0 deletions b/Collapse file
‎test/parallel/test-assert-deep.js‎
Copy file name to clipboardExpand all lines: test/parallel/test-assert-deep.js
+21Lines changed: 21 additions & 0 deletions
@@ -947,6 +947,27 @@ assert.throws(() => assert.deepStrictEqual(new Boolean(true), {}),
   );
 }
 
+// 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);