зеркало из https://github.com/mozilla/pjs.git
202 строки
10 KiB
JavaScript
202 строки
10 KiB
JavaScript
/* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code, released March
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* 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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*/
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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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var testcases = getTestCases();
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test();
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function getTestCases() {
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var array = new Array();
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var item = 0;
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array[item++] = new TestCase( SECTION, "String.prototype.substring.length", 2, String.prototype.substring.length );
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array[item++] = new TestCase( SECTION, "delete String.prototype.substring.length", false, delete String.prototype.substring.length );
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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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array[item++] = 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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return array;
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}
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function test() {
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for ( tc=0; tc < testcases.length; tc++ ) {
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testcases[tc].passed = writeTestCaseResult(
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testcases[tc].expect,
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testcases[tc].actual,
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testcases[tc].description +" = "+
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testcases[tc].actual );
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testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
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}
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stopTest();
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return ( testcases );
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}
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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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} |