1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/global-code/decl-lex.js b/js/src/tests/test262/language/global-code/decl-lex.js
new file mode 100644
index 0000000000..7b4cb2590c
--- /dev/null
+++ b/js/src/tests/test262/language/global-code/decl-lex.js
@@ -0,0 +1,54 @@
+// 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: Declaration of lexical bindings
+info: |
+  [...]
+  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 test262let = 1;
+
+test262let = 2;
+
+assert.sameValue(test262let, 2, '`let` binding is mutable');
+assert.sameValue(
+  this.hasOwnProperty('test262let'),
+  false,
+  'property not created on the global object (let)'
+);
+
+const test262const = 3;
+
+assert.throws(TypeError, function() {
+  test262const = 4;
+}, '`const` binding is strictly immutable');
+assert.sameValue(test262const, 3, '`const` binding cannot be modified');
+assert.sameValue(
+  this.hasOwnProperty('test262const'),
+  false,
+  'property not created on the global object (const)'
+);
+
+class test262class {}
+
+test262class = 5;
+
+assert.sameValue(test262class, 5, '`class` binding is mutable');
+assert.sameValue(
+  this.hasOwnProperty('test262class'),
+  false,
+  'property not created on the global object (class)'
+);
+
+reportCompare(0, 0);