1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/global-code/decl-lex-configurable-global.js b/js/src/tests/test262/language/global-code/decl-lex-configurable-global.js
new file mode 100644
index 0000000000..fd457b542b
--- /dev/null
+++ b/js/src/tests/test262/language/global-code/decl-lex-configurable-global.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-globaldeclarationinstantiation
+es6id: 15.1.8
+description: Lexical declarations "shadow" configurable global properties
+info: |
+  [...]
+  5. For each name in lexNames, do
+     [...]
+     c. Let hasRestrictedGlobal be ? envRec.HasRestrictedGlobalProperty(name).
+     d. If hasRestrictedGlobal is true, throw a SyntaxError exception.
+  [...]
+  16. For each element d in lexDeclarations do
+      a. NOTE Lexically declared names are only instantiated here but not
+         initialized.
+      b. For each element dn of the BoundNames of d do
+         i. If IsConstantDeclaration of d is true, then
+            1. Perform ? envRec.CreateImmutableBinding(dn, true).
+         ii. Else,
+             1. Perform ? envRec.CreateMutableBinding(dn, false).
+---*/
+
+let Array;
+
+assert.sameValue(Array, undefined);
+assert.sameValue(typeof this.Array, 'function');
+
+// DO NOT USE propertyHelper API!
+let descriptor = Object.getOwnPropertyDescriptor(this, 'Array');
+assert.sameValue(descriptor.configurable, true);
+assert.sameValue(descriptor.enumerable, false);
+assert.sameValue(descriptor.writable, true);
+
+reportCompare(0, 0);