Migrate more tests from blink repository.

test/webkit/fast/regex/lastIndex.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 page tests that a RegExp object's lastIndex behaves like a regular property."
+);
+
+// lastIndex is not configurable
+shouldBeFalse("delete /x/.lastIndex");
+shouldThrow("'use strict'; delete /x/.lastIndex");
+
+// lastIndex is not enumerable
+shouldBeTrue("'lastIndex' in /x/");
+shouldBeTrue("for (property in /x/) if (property === 'lastIndex') throw false; true");
+
+// lastIndex is writable
+shouldBeTrue("var re = /x/; re.lastIndex = re; re.lastIndex === re");
+
+// Cannot redefine lastIndex as an accessor
+shouldThrow("Object.defineProperty(/x/, {get:function(){}})");
+
+// Cannot redefine lastIndex as enumerable
+shouldThrow("Object.defineProperty(/x/, 'lastIndex', {enumerable:true}); true");
+shouldBeTrue("Object.defineProperty(/x/, 'lastIndex', {enumerable:false}); true");
+
+// Cannot redefine lastIndex as configurable
+shouldThrow("Object.defineProperty(/x/, 'lastIndex', {configurable:true}); true");
+shouldBeTrue("Object.defineProperty(/x/, 'lastIndex', {configurable:false}); true");
+
+// Can redefine lastIndex as read-only
+shouldBe("var re = Object.defineProperty(/x/, 'lastIndex', {writable:true}); re.lastIndex = 42; re.lastIndex", '42');
+shouldBe("var re = Object.defineProperty(/x/, 'lastIndex', {writable:false}); re.lastIndex = 42; re.lastIndex", '0');
+
+// Can redefine the value
+shouldBe("var re = Object.defineProperty(/x/, 'lastIndex', {value:42}); re.lastIndex", '42');
+
+// Cannot redefine read-only lastIndex as writable
+shouldThrow("Object.defineProperty(Object.defineProperty(/x/, 'lastIndex', {writable:false}), 'lastIndex', {writable:true}); true");
+
+// Can only redefine the value of a read-only lastIndex as the current value
+shouldThrow("Object.defineProperty(Object.defineProperty(/x/, 'lastIndex', {writable:false}), 'lastIndex', {value:42}); true");
+shouldBeTrue("Object.defineProperty(Object.defineProperty(/x/, 'lastIndex', {writable:false}), 'lastIndex', {value:0}); true");
+
+// Trying to run a global regular expression should throw, if lastIndex is read-only
+shouldBe("Object.defineProperty(/x/, 'lastIndex', {writable:false}).exec('')", 'null');
+shouldBe("Object.defineProperty(/x/, 'lastIndex', {writable:false}).exec('x')", '["x"]');
+shouldThrow("Object.defineProperty(/x/g, 'lastIndex', {writable:false}).exec('')");
+shouldThrow("Object.defineProperty(/x/g, 'lastIndex', {writable:false}).exec('x')");
+
+// Should be able to freeze a regular expression object.
+shouldBeTrue("var re = /x/; Object.freeze(re); Object.isFrozen(re);");