Migrate more tests from blink repository.

test/webkit/fast/js/regexp-non-capturing-groups.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 // 1.  Redistributions of source code must retain the above copyright
 //     notice, this list of conditions and the following disclaimer.
 // 2.  Redistributions in binary form must reproduce the above copyright
 //     notice, this list of conditions and the following disclaimer in the
 //     documentation and/or other materials provided with the distribution.
 //
 // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 description(
-"This tests that function inlining in the DFG JIT doesn't get confused by constants being reused between inliner and inlinee."
+'Test for behavior of non-capturing groups, as described in <a href="http://blog.stevenlevithan.com/archives/npcg-javascript">' +
+'a blog post by Steven Levithan</a> and <a href="http://bugs.webkit.org/show_bug.cgi?id=14931">bug 14931</a>.'
 );
 
-function foo(a, b) {
-    if (b)
-        return a + 4;
-    return b + 5;
-}
-
-function bar(a, b) {
-    return foo(a, b) + 5;
-}
-
-for (var i = 0; i < 1000; ++i)
-    bar(i, i + 1);
-
-shouldBe("bar(6, 0)", "10");
-shouldBe("bar(6, 1)", "15");
-shouldBe("bar(6, false)", "10");
-shouldBe("bar(6, true)", "15");
+shouldBe('/(x)?\\1y/.test("y")', 'true');
+shouldBe('/(x)?\\1y/.exec("y")', '["y", undefined]');
+shouldBe('/(x)?y/.exec("y")', '["y", undefined]');
+shouldBe('"y".match(/(x)?\\1y/)', '["y", undefined]');
+shouldBe('"y".match(/(x)?y/)', '["y", undefined]');
+shouldBe('"y".match(/(x)?\\1y/g)', '["y"]');
+shouldBe('"y".split(/(x)?\\1y/)', '["", undefined, ""]');
+shouldBe('"y".split(/(x)?y/)', '["", undefined, ""]');
+shouldBe('"y".search(/(x)?\\1y/)', '0');
+shouldBe('"y".replace(/(x)?\\1y/, "z")', '"z"');
+shouldBe('"y".replace(/(x)?y/, "$1")', '""');
+shouldBe('"y".replace(/(x)?\\1y/, function($0, $1){ return String($1); })', '"undefined"');
+shouldBe('"y".replace(/(x)?y/, function($0, $1){ return String($1); })', '"undefined"');
+shouldBe('"y".replace(/(x)?y/, function($0, $1){ return $1; })', '"undefined"');