From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../extensions/mutable-proto-special-form.js       | 91 ++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 js/src/tests/non262/extensions/mutable-proto-special-form.js

(limited to 'js/src/tests/non262/extensions/mutable-proto-special-form.js')

diff --git a/js/src/tests/non262/extensions/mutable-proto-special-form.js b/js/src/tests/non262/extensions/mutable-proto-special-form.js
new file mode 100644
index 0000000000..b196507f25
--- /dev/null
+++ b/js/src/tests/non262/extensions/mutable-proto-special-form.js
@@ -0,0 +1,91 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 948583;
+var summary =
+  "Make __proto__ in object literals a special form not influenced by " +
+  "|Object.prototype|";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var passed = true;
+
+function performProtoTests(msg)
+{
+  print("Testing " + msg);
+  assertEq(passed, true, "passed wrong at start of test set");
+
+  assertEq(Object.getPrototypeOf({ __proto__: null }), null);
+  assertEq(Object.getPrototypeOf({ __proto__: undefined }), Object.prototype);
+  assertEq(Object.getPrototypeOf({ __proto__: 17 }), Object.prototype);
+
+  var obj = {};
+  assertEq(Object.getPrototypeOf({ __proto__: obj }), obj);
+
+  assertEq(passed, true, "passed wrong at end of test set");
+  print("Tests of " + msg + " passed!");
+}
+
+function poisonProto(obj)
+{
+  Object.defineProperty(obj, "__proto__",
+                        {
+                          configurable: true,
+                          enumerable: true,
+                          set: function(v) { passed = false; },
+                        });
+}
+
+performProtoTests("initial behavior");
+
+var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
+var setProto = desc.set;
+delete Object.prototype.__proto__;
+
+performProtoTests("behavior after Object.prototype.__proto__ deletion");
+
+Object.defineProperty(Object.prototype, "__proto__",
+                      {
+                        configurable: true,
+                        enumerable: false,
+                        set: function(v) { passed = false; },
+                      });
+
+performProtoTests("behavior after making Object.prototype.__proto__ a " +
+                  "custom setter");
+
+Object.defineProperty(Object.prototype, "__proto__", { set: undefined });
+
+performProtoTests("behavior after making Object.prototype.__proto__'s " +
+                  "[[Set]] === undefined");
+
+try
+{
+  var superProto = Object.create(null);
+  poisonProto(superProto);
+  setProto.call(Object.prototype, superProto);
+
+  performProtoTests("behavior after mutating Object.prototype.[[Prototype]]");
+
+  // Note: The handler below will have to be updated to exempt a scriptable
+  //       getPrototypeOf trap (to instead consult the target whose [[Prototype]]
+  //       is safely non-recursive), if we ever implement one.
+  var death = new Proxy(Object.create(null),
+                        new Proxy({}, { get: function() { passed = false; } }));
+
+  setProto.call(Object.prototype, death);
+
+  performProtoTests("behavior after making Object.prototype.[[Prototype]] a " +
+                    "proxy that throws for any access");
+}
+catch (e) {}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
-- 
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