/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /** File Name: 15.5.4.9-1.js ECMA Section: 15.5.4.9 String.prototype.substring( start ) Description: 15.5.4.9 String.prototype.substring(start) Returns a substring of the result of converting this object to a string, starting from character position start and running to the end of the string. The result is a string value, not a String object. If the argument is NaN or negative, it is replaced with zero; if the argument is larger than the length of the string, it is replaced with the length of the string. When the substring method is called with one argument start, the following steps are taken: 1.Call ToString, giving it the this value as its argument. 2.Call ToInteger(start). 3.Compute the number of characters in Result(1). 4.Compute min(max(Result(2), 0), Result(3)). 5.Return a string whose length is the difference between Result(3) and Result(4), containing characters from Result(1), namely the characters with indices Result(4) through Result(3)1, in ascending order. Author: christine@netscape.com Date: 12 november 1997 */ var SECTION = "15.5.4.9-1"; var VERSION = "ECMA_1"; startTest(); var TITLE = "String.prototype.substring( start )"; writeHeaderToLog( SECTION + " "+ TITLE); new TestCase( SECTION, "String.prototype.substring.length", 2, String.prototype.substring.length ); // test cases for when substring is called with no arguments. // this is a string object new TestCase( SECTION, "var s = new String('this is a string object'); typeof s.substring()", "string", eval("var s = new String('this is a string object'); typeof s.substring()") ); new TestCase( SECTION, "var s = new String(''); s.substring()", "", eval("var s = new String(''); s.substring()") ); new TestCase( SECTION, "var s = new String('this is a string object'); s.substring()", "this is a string object", eval("var s = new String('this is a string object'); s.substring()") ); new TestCase( SECTION, "var s = new String('this is a string object'); s.substring(NaN)", "this is a string object", eval("var s = new String('this is a string object'); s.substring(NaN)") ); new TestCase( SECTION, "var s = new String('this is a string object'); s.substring(-0.01)", "this is a string object", eval("var s = new String('this is a string object'); s.substring(-0.01)") ); new TestCase( SECTION, "var s = new String('this is a string object'); s.substring(s.length)", "", eval("var s = new String('this is a string object'); s.substring(s.length)") ); new TestCase( SECTION, "var s = new String('this is a string object'); s.substring(s.length+1)", "", eval("var s = new String('this is a string object'); s.substring(s.length+1)") ); new TestCase( SECTION, "var s = new String('this is a string object'); s.substring(Infinity)", "", eval("var s = new String('this is a string object'); s.substring(Infinity)") ); new TestCase( SECTION, "var s = new String('this is a string object'); s.substring(-Infinity)", "this is a string object", eval("var s = new String('this is a string object'); s.substring(-Infinity)") ); // this is not a String object, start is not an integer new TestCase( SECTION, "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()", "1,2,3,4,5", eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()") ); new TestCase( SECTION, "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)", ",2,3,4,5", eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)") ); new TestCase( SECTION, "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')", "3,4,5", eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')") ); new TestCase( SECTION, "var s = new Array(); s.substring = String.prototype.substring; s.substring('4')", "", eval("var s = new Array(); s.substring = String.prototype.substring; s.substring('4')") ); // this is an object object new TestCase( SECTION, "var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)", "Object]", eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)") ); // this is a function object new TestCase( SECTION, "var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)", "Function]", eval("var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)") ); // this is a number object new TestCase( SECTION, "var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)", "NaN", eval("var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)") ); // this is the Math object new TestCase( SECTION, "var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)", "ject Math]", eval("var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)") ); // this is a Boolean object new TestCase( SECTION, "var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())", "false", eval("var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())") ); // this is a user defined object new TestCase( SECTION, "var obj = new MyObject( null ); obj.substring(0)", "null", eval( "var obj = new MyObject( null ); obj.substring(0)") ); test(); function MyObject( value ) { this.value = value; this.substring = String.prototype.substring; this.toString = new Function ( "return this.value+''" ); }