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+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// ES6 extends the \uxxxx escape and also allows \u{xxxxx}.
+
+// Unicode escapes in variable names.
+
+(function TestVariableNames1() {
+  var foobar = 1;
+  assertEquals(foob\u0061r, 1);
+  assertEquals(foob\u{0061}r, 1);
+  assertEquals(foob\u{61}r, 1);
+  assertEquals(foob\u{0000000061}r, 1);
+})();
+
+(function TestVariableNames2() {
+  var foobar = 1;
+  assertEquals(\u0066oobar, 1);
+  assertEquals(\u{0066}oobar, 1);
+  assertEquals(\u{66}oobar, 1);
+  assertEquals(\u{0000000066}oobar, 1);
+})();
+
+// Unicode escapes in strings.
+
+(function TestStrings() {
+  var s1 = "foob\u0061r";
+  assertEquals(s1, "foobar");
+  var s2 = "foob\u{0061}r";
+  assertEquals(s2, "foobar");
+  var s3 = "foob\u{61}r";
+  assertEquals(s3, "foobar");
+  var s4 = "foob\u{0000000061}r";
+  assertEquals(s4, "foobar");
+})();
+
+
+(function TestSurrogates() {
+  // U+10E6D corresponds to the surrogate pair [U+D803, U+DE6D].
+  var s1 = "foo\u{10e6d}";
+  var s2 = "foo\u{d803}\u{de6d}";
+  assertEquals(s1, s2);
+})();