michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: 
michael@0: /**
michael@0:    File Name:          15.5.4.10-1.js
michael@0:    ECMA Section:       15.5.4.10 String.prototype.substring( start, end )
michael@0:    Description:
michael@0: 
michael@0:    15.5.4.10 String.prototype.substring(start, end)
michael@0: 
michael@0:    Returns a substring of the result of converting this object to a string,
michael@0:    starting from character position start and running to character position
michael@0:    end of the string. The result is a string value, not a String object.
michael@0: 
michael@0:    If either argument is NaN or negative, it is replaced with zero; if either
michael@0:    argument is larger than the length of the string, it is replaced with the
michael@0:    length of the string.
michael@0: 
michael@0:    If start is larger than end, they are swapped.
michael@0: 
michael@0:    When the substring method is called with two arguments start and end, the
michael@0:    following steps are taken:
michael@0: 
michael@0:    1.  Call ToString, giving it the this value as its argument.
michael@0:    2.  Call ToInteger(start).
michael@0:    3.  Call ToInteger (end).
michael@0:    4.  Compute the number of characters in Result(1).
michael@0:    5.  Compute min(max(Result(2), 0), Result(4)).
michael@0:    6.  Compute min(max(Result(3), 0), Result(4)).
michael@0:    7.  Compute min(Result(5), Result(6)).
michael@0:    8.  Compute max(Result(5), Result(6)).
michael@0:    9.  Return a string whose length is the difference between Result(8) and
michael@0:    Result(7), containing characters from Result(1), namely the characters
michael@0:    with indices Result(7) through Result(8)1, in ascending order.
michael@0: 
michael@0:    Note that the substring function is intentionally generic; it does not require
michael@0:    that its this value be a String object. Therefore it can be transferred to other
michael@0:    kinds of objects for use as a method.
michael@0: 
michael@0:    Author:             christine@netscape.com
michael@0:    Date:               12 november 1997
michael@0: */
michael@0: 
michael@0: var SECTION = "15.5.4.10-1";
michael@0: var VERSION = "ECMA_1";
michael@0: startTest();
michael@0: var TITLE   = "String.prototype.substring( start, end )";
michael@0: 
michael@0: writeHeaderToLog( SECTION + " "+ TITLE);
michael@0: 
michael@0: new TestCase( SECTION,  "String.prototype.substring.length",        2,          String.prototype.substring.length );
michael@0: new TestCase( SECTION,  "delete String.prototype.substring.length", false,      delete String.prototype.substring.length );
michael@0: new TestCase( SECTION,  "delete String.prototype.substring.length; String.prototype.substring.length", 2,      eval("delete String.prototype.substring.length; String.prototype.substring.length") );
michael@0: 
michael@0: // test cases for when substring is called with no arguments.
michael@0: 
michael@0: // this is a string object
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); typeof s.substring()",
michael@0: 		"string",
michael@0: 		eval("var s = new String('this is a string object'); typeof s.substring()") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String(''); s.substring(1,0)",
michael@0: 		"",
michael@0: 		eval("var s = new String(''); s.substring(1,0)") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(true, false)",
michael@0: 		"t",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(false, true)") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(NaN, Infinity)",
michael@0: 		"this is a string object",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(NaN, Infinity)") );
michael@0: 
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(Infinity, NaN)",
michael@0: 		"this is a string object",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(Infinity, NaN)") );
michael@0: 
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(Infinity, Infinity)",
michael@0: 		"",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(Infinity, Infinity)") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(-0.01, 0)",
michael@0: 		"",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(-0.01,0)") );
michael@0: 
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(s.length, s.length)",
michael@0: 		"",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(s.length, s.length)") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(s.length+1, 0)",
michael@0: 		"this is a string object",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(s.length+1, 0)") );
michael@0: 
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new String('this is a string object'); s.substring(-Infinity, -Infinity)",
michael@0: 		"",
michael@0: 		eval("var s = new String('this is a string object'); s.substring(-Infinity, -Infinity)") );
michael@0: 
michael@0: // this is not a String object, start is not an integer
michael@0: 
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(Infinity,-Infinity)",
michael@0: 		"1,2,3,4,5",
michael@0: 		eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(Infinity,-Infinity)") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true, false)",
michael@0: 		"1",
michael@0: 		eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true, false)") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4', '5')",
michael@0: 		"3",
michael@0: 		eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4', '5')") );
michael@0: 
michael@0: 
michael@0: // this is an object object
michael@0: new TestCase(   SECTION,
michael@0: 		"var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8,0)",
michael@0: 		"[object ",
michael@0: 		eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8,0)") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8,obj.toString().length)",
michael@0: 		"Object]",
michael@0: 		eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8, obj.toString().length)") );
michael@0: 
michael@0: // this is a function object
michael@0: new TestCase(   SECTION,
michael@0: 		"var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8, Infinity)",
michael@0: 		"Function]",
michael@0: 		eval("var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8,Infinity)") );
michael@0: // this is a number object
michael@0: new TestCase(   SECTION,
michael@0: 		"var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(Infinity, NaN)",
michael@0: 		"NaN",
michael@0: 		eval("var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(Infinity, NaN)") );
michael@0: 
michael@0: // this is the Math object
michael@0: new TestCase(   SECTION,
michael@0: 		"var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI, -10)",
michael@0: 		"[ob",
michael@0: 		eval("var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI, -10)") );
michael@0: 
michael@0: // this is a Boolean object
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0: 		"var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array(), new Boolean(1))",
michael@0: 		"f",
michael@0: 		eval("var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array(), new Boolean(1))") );
michael@0: 
michael@0: // this is a user defined object
michael@0: 
michael@0: new TestCase( SECTION,
michael@0: 	      "var obj = new MyObject( void 0 ); obj.substring(0, 100)",
michael@0: 	      "undefined",
michael@0: 	      eval( "var obj = new MyObject( void 0 ); obj.substring(0,100)") );
michael@0: 
michael@0: test();
michael@0: 
michael@0: function MyObject( value ) {
michael@0:   this.value = value;
michael@0:   this.substring = String.prototype.substring;
michael@0:   this.toString = new Function ( "return this.value+''" );
michael@0: }