Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/js/src/tests/test262/language/expressions/compound-assignment/11.13.2-27-s-strict.js b/js/src/tests/test262/language/expressions/compound-assignment/11.13.2-27-s-strict.js
new file mode 100644
index 0000000000..ac762ff2f3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/compound-assignment/11.13.2-27-s-strict.js
@@ -0,0 +1,26 @@
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 11.13.2-27-s
+description: >
+    Strict Mode - TypeError is thrown if The LeftHandSide of a
+    Compound Assignment operator(-=) is a reference to a data property
+    with the attribute value {[[Writable]]:false}
+flags: [onlyStrict]
+---*/
+
+        var obj = {};
+        Object.defineProperty(obj, "prop", {
+            value: 10,
+            writable: false,
+            enumerable: true,
+            configurable: true
+        });
+assert.throws(TypeError, function() {
+            obj.prop -= 20;
+});
+assert.sameValue(obj.prop, 10, 'obj.prop');
+
+reportCompare(0, 0);