зеркало из https://github.com/mozilla/pjs.git
201 строка
7.9 KiB
JavaScript
201 строка
7.9 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: 15.5.4.9-1.js
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ECMA Section: 15.5.4.9 String.prototype.substring( start )
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Description:
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15.5.4.9 String.prototype.substring(start)
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Returns a substring of the result of converting this object to a string,
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starting from character position start and running to the end of the
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string. The result is a string value, not a String object.
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If the argument is NaN or negative, it is replaced with zero; if the
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argument is larger than the length of the string, it is replaced with the
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length of the string.
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When the substring method is called with one argument start, the following
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steps are taken:
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1.Call ToString, giving it the this value as its argument.
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2.Call ToInteger(start).
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3.Compute the number of characters in Result(1).
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4.Compute min(max(Result(2), 0), Result(3)).
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5.Return a string whose length is the difference between Result(3) and Result(4),
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containing characters from Result(1), namely the characters with indices Result(4)
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through Result(3)1, in ascending order.
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Author: christine@netscape.com
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Date: 12 november 1997
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*/
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var SECTION = "15.5.4.9-1";
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var VERSION = "ECMA_1";
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startTest();
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var TITLE = "String.prototype.substring( start )";
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writeHeaderToLog( SECTION + " "+ TITLE);
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new TestCase( SECTION, "String.prototype.substring.length", 2, String.prototype.substring.length );
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new TestCase( SECTION, "delete String.prototype.substring.length", false, delete String.prototype.substring.length );
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new TestCase( SECTION, "delete String.prototype.substring.length; String.prototype.substring.length", 2, eval("delete String.prototype.substring.length; String.prototype.substring.length") );
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// test cases for when substring is called with no arguments.
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// this is a string object
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new TestCase( SECTION,
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"var s = new String('this is a string object'); typeof s.substring()",
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"string",
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eval("var s = new String('this is a string object'); typeof s.substring()") );
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new TestCase( SECTION,
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"var s = new String(''); s.substring()",
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"",
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eval("var s = new String(''); s.substring()") );
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new TestCase( SECTION,
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"var s = new String('this is a string object'); s.substring()",
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"this is a string object",
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eval("var s = new String('this is a string object'); s.substring()") );
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new TestCase( SECTION,
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"var s = new String('this is a string object'); s.substring(NaN)",
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"this is a string object",
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eval("var s = new String('this is a string object'); s.substring(NaN)") );
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new TestCase( SECTION,
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"var s = new String('this is a string object'); s.substring(-0.01)",
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"this is a string object",
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eval("var s = new String('this is a string object'); s.substring(-0.01)") );
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new TestCase( SECTION,
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"var s = new String('this is a string object'); s.substring(s.length)",
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"",
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eval("var s = new String('this is a string object'); s.substring(s.length)") );
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new TestCase( SECTION,
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"var s = new String('this is a string object'); s.substring(s.length+1)",
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"",
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eval("var s = new String('this is a string object'); s.substring(s.length+1)") );
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new TestCase( SECTION,
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"var s = new String('this is a string object'); s.substring(Infinity)",
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"",
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eval("var s = new String('this is a string object'); s.substring(Infinity)") );
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new TestCase( SECTION,
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"var s = new String('this is a string object'); s.substring(-Infinity)",
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"this is a string object",
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eval("var s = new String('this is a string object'); s.substring(-Infinity)") );
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// this is not a String object, start is not an integer
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new TestCase( SECTION,
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"var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()",
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"1,2,3,4,5",
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eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()") );
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new TestCase( SECTION,
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"var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)",
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",2,3,4,5",
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eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)") );
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new TestCase( SECTION,
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"var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')",
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"3,4,5",
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eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')") );
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new TestCase( SECTION,
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"var s = new Array(); s.substring = String.prototype.substring; s.substring('4')",
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"",
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eval("var s = new Array(); s.substring = String.prototype.substring; s.substring('4')") );
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// this is an object object
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new TestCase( SECTION,
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"var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)",
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"Object]",
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eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)") );
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// this is a function object
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new TestCase( SECTION,
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"var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)",
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"Function]",
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eval("var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)") );
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// this is a number object
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new TestCase( SECTION,
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"var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)",
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"NaN",
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eval("var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)") );
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// this is the Math object
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new TestCase( SECTION,
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"var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)",
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"ject Math]",
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eval("var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)") );
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// this is a Boolean object
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new TestCase( SECTION,
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"var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())",
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"false",
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eval("var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())") );
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// this is a user defined object
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new TestCase( SECTION,
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"var obj = new MyObject( null ); obj.substring(0)",
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"null",
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eval( "var obj = new MyObject( null ); obj.substring(0)") );
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test();
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function MyObject( value ) {
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this.value = value;
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this.substring = String.prototype.substring;
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this.toString = new Function ( "return this.value+''" );
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}
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