Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 31 insertions, 0 deletions

diff --git a/js/src/tests/test262/language/expressions/arrow-function/cannot-override-this-with-thisArg.js b/js/src/tests/test262/language/expressions/arrow-function/cannot-override-this-with-thisArg.js
new file mode 100644
index 0000000000..0ed46492de
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/arrow-function/cannot-override-this-with-thisArg.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.2
+description: >
+    ArrowFunction `this` cannot be overridden by thisArg
+
+    9.2.4 FunctionInitialize (F, kind, ParameterList, Body, Scope)
+
+      ...
+      9. If kind is Arrow, set the [[ThisMode]] internal slot of F to lexical.
+      ...
+
+    9.2.1.2 OrdinaryCallBindThis ( F, calleeContext, thisArgument )
+
+      1. Let thisMode be the value of F’s [[ThisMode]] internal slot.
+      2. If thisMode is lexical, return NormalCompletion(undefined).
+      ...
+
+---*/
+
+var calls = 0;
+var usurper = {};
+[1].forEach(value => {
+  calls++;
+  assert.notSameValue(this, usurper);
+}, usurper);
+
+assert.sameValue(calls, 1);
+
+reportCompare(0, 0);