gecko/js/tests/ecma_3/Function/call-001.js

154 lines
4.6 KiB
JavaScript

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* pschwartau@netscape.com
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* ***** END LICENSE BLOCK ***** */
/*
* Date: 2001-07-13
*
* SUMMARY: Applying Function.prototype.call to the Function object itself
*
*
* ECMA-262 15.3.4.4 Function.prototype.call (thisArg [,arg1 [,arg2,…] ] )
*
* When applied to the Function object itself, thisArg should be ignored.
* As explained by Waldemar (waldemar@netscape.com):
*
* Function.call(obj, "print(this)") is equivalent to invoking
* Function("print(this)") with this set to obj. Now, Function("print(this)")
* is equivalent to new Function("print(this)") (see 15.3.1.1), and the latter
* ignores the this value that you passed it and constructs a function
* (which we'll call F) which will print the value of the this that will be
* passed in when F will be invoked.
*
* With the last set of () you're invoking F(), which means you're calling it
* with no this value. When you don't provide a this value, it defaults to the
* global object.
*
*/
//-----------------------------------------------------------------------------
var gTestfile = 'call-001.js';
var UBound = 0;
var BUGNUMBER = '(none)';
var summary = 'Applying Function.prototype.call to the Function object itself';
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
var self = this; // capture a reference to the global object
var cnOBJECT_GLOBAL = self.toString();
var cnOBJECT_OBJECT = (new Object).toString();
var cnHello = 'Hello';
var cnRed = 'red';
var objTEST = {color:cnRed};
var f = new Function();
var g = new Function();
f = Function.call(self, 'return cnHello');
g = Function.call(objTEST, 'return cnHello');
status = 'Section A of test';
actual = f();
expect = cnHello;
captureThis();
status = 'Section B of test';
actual = g();
expect = cnHello;
captureThis();
f = Function.call(self, 'return this.toString()');
g = Function.call(objTEST, 'return this.toString()');
status = 'Section C of test';
actual = f();
expect = cnOBJECT_GLOBAL;
captureThis();
status = 'Section D of test';
actual = g();
expect = cnOBJECT_GLOBAL;
captureThis();
f = Function.call(self, 'return this.color');
g = Function.call(objTEST, 'return this.color');
status = 'Section E of test';
actual = f();
expect = undefined;
captureThis();
status = 'Section F of test';
actual = g();
expect = undefined;
captureThis();
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function captureThis()
{
statusitems[UBound] = status;
actualvalues[UBound] = actual;
expectedvalues[UBound] = expect;
UBound++;
}
function test()
{
enterFunc ('test');
printBugNumber(BUGNUMBER);
printStatus (summary);
for (var i = 0; i < UBound; i++)
{
reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
}
exitFunc ('test');
}