зеркало из https://github.com/mozilla/pjs.git
110 строки
4.8 KiB
JavaScript
110 строки
4.8 KiB
JavaScript
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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 Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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File Name: 15.5.4.4-3.js
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ECMA Section: 15.5.4.4 String.prototype.charAt(pos)
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Description: Returns a string containing the character at position
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pos in the string. If there is no character at that
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string, the result is the empty string. The result is
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a string value, not a String object.
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When the charAt method is called with one argument,
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pos, the following steps are taken:
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1. Call ToString, with this value as its argument
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2. Call ToInteger pos
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3. Compute the number of characters in Result(1)
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4. If Result(2) is less than 0 is or not less than
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Result(3), return the empty string
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5. Return a string of length 1 containing one character
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from result (1), the character at position Result(2).
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Note that the charAt function is intentionally generic;
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it does not require that its this value be a String
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object. Therefore it can be transferred to other kinds
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of objects for use as a method.
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This tests assiging charAt to a user-defined function.
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Author: christine@netscape.com
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Date: 2 october 1997
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*/
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var SECTION = "15.5.4.4-3";
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var VERSION = "ECMA_1";
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startTest();
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var TITLE = "String.prototype.charAt";
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writeHeaderToLog( SECTION + " "+ TITLE);
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var foo = new MyObject('hello');
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new TestCase( SECTION, "var foo = new MyObject('hello'); ", "h", foo.charAt(0) );
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new TestCase( SECTION, "var foo = new MyObject('hello'); ", "e", foo.charAt(1) );
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new TestCase( SECTION, "var foo = new MyObject('hello'); ", "l", foo.charAt(2) );
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new TestCase( SECTION, "var foo = new MyObject('hello'); ", "l", foo.charAt(3) );
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new TestCase( SECTION, "var foo = new MyObject('hello'); ", "o", foo.charAt(4) );
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new TestCase( SECTION, "var foo = new MyObject('hello'); ", "", foo.charAt(-1) );
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new TestCase( SECTION, "var foo = new MyObject('hello'); ", "", foo.charAt(5) );
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var boo = new MyObject(true);
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new TestCase( SECTION, "var boo = new MyObject(true); ", "t", boo.charAt(0) );
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new TestCase( SECTION, "var boo = new MyObject(true); ", "r", boo.charAt(1) );
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new TestCase( SECTION, "var boo = new MyObject(true); ", "u", boo.charAt(2) );
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new TestCase( SECTION, "var boo = new MyObject(true); ", "e", boo.charAt(3) );
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var noo = new MyObject( Math.PI );
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new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "3", noo.charAt(0) );
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new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", ".", noo.charAt(1) );
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new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "1", noo.charAt(2) );
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new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "4", noo.charAt(3) );
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new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "1", noo.charAt(4) );
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new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "5", noo.charAt(5) );
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new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "9", noo.charAt(6) );
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test();
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function MyObject (v) {
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this.value = v;
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this.toString = new Function( "return this.value +'';" );
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this.valueOf = new Function( "return this.value" );
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this.charAt = String.prototype.charAt;
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}
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