зеркало из https://github.com/mozilla/gecko-dev.git
156 строки
3.8 KiB
JavaScript
156 строки
3.8 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is JavaScript Engine testing utilities.
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*
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* The Initial Developer of the Original Code is Netscape Communications Corp.
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* Portions created by the Initial Developer are Copyright (C) 2003
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s): Adrian Herscu<bmf1972@icqmail.com>, pschwartau@netscape.com
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK *****
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*
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*
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* Date: 13 Oct 2003
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* SUMMARY: Make our f.caller property match IE's wrt f.apply and f.call
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* See http://bugzilla.mozilla.org/show_bug.cgi?id=222029
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*
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* Below, when gg calls f via |f.call|, we have this call chain:
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*
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* calls calls
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* gg() ---------> Function.prototype.call() ---------> f()
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*
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*
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* The question this bug addresses is, "What should we say |f.caller| is?"
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*
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* Before this fix, SpiderMonkey said it was |Function.prototype.call|.
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* After this fix, SpiderMonkey emulates IE and says |gg| instead.
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*
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*/
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//-----------------------------------------------------------------------------
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var UBound = 0;
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var bug = 222029;
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var summary = "Make our f.caller property match IE's wrt f.apply and f.call";
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var status = '';
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var statusitems = [];
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var actual = '';
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var actualvalues = [];
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var expect= '';
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var expectedvalues = [];
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function f()
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{
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return f.caller.p ;
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}
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/*
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* Call |f| directly
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*/
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function g()
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{
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return f();
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}
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g.p = "hello";
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/*
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* Call |f| via |f.call|
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*/
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function gg()
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{
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return f.call(this);
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}
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gg.p = "hello";
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/*
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* Call |f| via |f.apply|
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*/
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function ggg()
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{
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return f.apply(this);
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}
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ggg.p = "hello";
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/*
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* Shadow |p| on |Function.prototype.call|, |Function.prototype.apply|.
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* In Sections 2 and 3 below, we no longer expect to recover this value -
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*/
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Function.prototype.call.p = "goodbye";
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Function.prototype.apply.p = "goodbye";
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status = inSection(1);
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actual = g();
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expect = "hello";
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addThis();
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status = inSection(2);
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actual = gg();
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expect = "hello";
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addThis();
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status = inSection(3);
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actual = ggg();
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expect = "hello";
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addThis();
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//-----------------------------------------------------------------------------
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test();
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//-----------------------------------------------------------------------------
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function addThis()
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{
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statusitems[UBound] = status;
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actualvalues[UBound] = actual;
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expectedvalues[UBound] = expect;
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UBound++;
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}
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function test()
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{
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enterFunc('test');
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printBugNumber(bug);
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printStatus(summary);
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for (var i=0; i<UBound; i++)
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{
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reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
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}
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exitFunc ('test');
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}
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