--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/nashorn/script/basic/es6.js	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Make sure ECMAScript 6 features are not available in ES5 mode.
+ *
+ * @test
+ * @run
+ */
+
+function checkUndefined(name, object) {
+    if (typeof object[name] !== 'undefined' || name in object) {
+        Assert.fail(name + ' is defined in ' + object);
+    }
+}
+
+checkUndefined('Symbol', this);
+checkUndefined('Map', this);
+checkUndefined('Set', this);
+checkUndefined('WeakMap', this);
+checkUndefined('WeakSet', this);
+checkUndefined('getOwnPropertySymbols', Object);
+checkUndefined('entries', Array.prototype);
+checkUndefined('values', Array.prototype);
+checkUndefined('keys', Array.prototype);
+
+function expectError(src, msg, error) {
+    try {
+        eval(src);
+        Assert.fail(msg);
+    } catch (e) {
+        if (e.name !== error) {
+            Assert.fail('Unexpected error: ' + e);
+        }
+    }
+}
+
+expectError('let i = 0', 'let', 'SyntaxError');
+expectError('const i = 0', 'const', 'SyntaxError');
+expectError('for (let i = 0; i < 10; i++) print(i)', 'for-let', 'SyntaxError');
+expectError('0b0', 'numeric literal', 'SyntaxError');
+expectError('0o0', 'numeric litera', 'SyntaxError');
+expectError('`text`', 'template literal', 'SyntaxError');
+expectError('`${ x }`', 'template literal', 'SyntaxError');
+expectError('`text ${ x } text`', 'template literal', 'SyntaxError');
+expectError('f`text`', 'template literal', 'SyntaxError');
+expectError('for (a of [1, 2, 3]) print(a)', 'for-of', 'SyntaxError');
+expectError('for (var a of [1, 2, 3]) print(a)', 'for-of', 'SyntaxError');
+expectError('for (let a of [1, 2, 3]) print(a)', 'for-of', 'SyntaxError');
+expectError('for (const a of [1, 2, 3]) print(a)', 'for-of', 'SyntaxError');
+