tests/mozilla/ecma/String/15.5.4.9-1.js

   1 /* The contents of this file are subject to the Netscape Public
   2  * License Version 1.1 (the "License"); you may not use this file
   3  * except in compliance with the License. You may obtain a copy of
   4  * the License at http://www.mozilla.org/NPL/
   5  *
   6  * Software distributed under the License is distributed on an "AS
   7  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
   8  * implied. See the License for the specific language governing
   9  * rights and limitations under the License.
  10  *
  11  * The Original Code is Mozilla Communicator client code, released March
  12  * 31, 1998.
  13  *
  14  * The Initial Developer of the Original Code is Netscape Communications
  15  * Corporation. Portions created by Netscape are
  16  * Copyright (C) 1998 Netscape Communications Corporation. All
  17  * Rights Reserved.
  18  *
  19  * Contributor(s):
  20  *
  21  */
  22 /**
  23     File Name:          15.5.4.9-1.js
  24     ECMA Section:       15.5.4.9 String.prototype.substring( start )
  25     Description:
  26
  27     15.5.4.9 String.prototype.substring(start)
  28
  29     Returns a substring of the result of converting this object to a string,
  30     starting from character position start and running to the end of the
  31     string. The result is a string value, not a String object.
  32
  33     If the argument is NaN or negative, it is replaced with zero; if the
  34     argument is larger than the length of the string, it is replaced with the
  35     length of the string.
  36
  37     When the substring method is called with one argument start, the following
  38     steps are taken:
  39
  40     1.Call ToString, giving it the this value as its argument.
  41     2.Call ToInteger(start).
  42     3.Compute the number of characters in Result(1).
  43     4.Compute min(max(Result(2), 0), Result(3)).
  44     5.Return a string whose length is the difference between Result(3) and Result(4),
  45     containing characters from Result(1), namely the characters with indices Result(4)
  46     through Result(3)1, in ascending order.
  47
  48     Author:             christine@netscape.com
  49     Date:               12 november 1997
  50 */
  51
  52     var SECTION = "15.5.4.9-1";
  53     var VERSION = "ECMA_1";
  54     startTest();
  55     var TITLE   = "String.prototype.substring( start )";
  56
  57     writeHeaderToLog( SECTION + " "+ TITLE);
  58
  59     var testcases = getTestCases();
  60     test();
  61
  62 function getTestCases() {
  63     var array = new Array();
  64     var item = 0;
  65
  66     array[item++] = new TestCase( SECTION,  "String.prototype.substring.length",        2,          String.prototype.substring.length );
  67     array[item++] = new TestCase( SECTION,  "delete String.prototype.substring.length", false,      delete String.prototype.substring.length );
  68     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") );
  69
  70     // test cases for when substring is called with no arguments.
  71
  72     // this is a string object
  73
  74     array[item++] = new TestCase(   SECTION,
  75                                     "var s = new String('this is a string object'); typeof s.substring()",
  76                                     "string",
  77                                     eval("var s = new String('this is a string object'); typeof s.substring()") );
  78
  79     array[item++] = new TestCase(   SECTION,
  80                                     "var s = new String(''); s.substring()",
  81                                     "",
  82                                     eval("var s = new String(''); s.substring()") );
  83
  84
  85     array[item++] = new TestCase(   SECTION,
  86                                     "var s = new String('this is a string object'); s.substring()",
  87                                     "this is a string object",
  88                                     eval("var s = new String('this is a string object'); s.substring()") );
  89
  90     array[item++] = new TestCase(   SECTION,
  91                                     "var s = new String('this is a string object'); s.substring(NaN)",
  92                                     "this is a string object",
  93                                     eval("var s = new String('this is a string object'); s.substring(NaN)") );
  94
  95
  96     array[item++] = new TestCase(   SECTION,
  97                                     "var s = new String('this is a string object'); s.substring(-0.01)",
  98                                     "this is a string object",
  99                                     eval("var s = new String('this is a string object'); s.substring(-0.01)") );
 100
 101
 102     array[item++] = new TestCase(   SECTION,
 103                                     "var s = new String('this is a string object'); s.substring(s.length)",
 104                                     "",
 105                                     eval("var s = new String('this is a string object'); s.substring(s.length)") );
 106
 107     array[item++] = new TestCase(   SECTION,
 108                                     "var s = new String('this is a string object'); s.substring(s.length+1)",
 109                                     "",
 110                                     eval("var s = new String('this is a string object'); s.substring(s.length+1)") );
 111
 112
 113     array[item++] = new TestCase(   SECTION,
 114                                     "var s = new String('this is a string object'); s.substring(Infinity)",
 115                                     "",
 116                                     eval("var s = new String('this is a string object'); s.substring(Infinity)") );
 117
 118     array[item++] = new TestCase(   SECTION,
 119                                     "var s = new String('this is a string object'); s.substring(-Infinity)",
 120                                     "this is a string object",
 121                                     eval("var s = new String('this is a string object'); s.substring(-Infinity)") );
 122
 123     // this is not a String object, start is not an integer
 124
 125
 126     array[item++] = new TestCase(   SECTION,
 127                                     "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()",
 128                                     "1,2,3,4,5",
 129                                     eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()") );
 130
 131     array[item++] = new TestCase(   SECTION,
 132                                     "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)",
 133                                     ",2,3,4,5",
 134                                     eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)") );
 135
 136     array[item++] = new TestCase(   SECTION,
 137                                     "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')",
 138                                     "3,4,5",
 139                                     eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')") );
 140
 141     array[item++] = new TestCase(   SECTION,
 142                                     "var s = new Array(); s.substring = String.prototype.substring; s.substring('4')",
 143                                     "",
 144                                     eval("var s = new Array(); s.substring = String.prototype.substring; s.substring('4')") );
 145
 146     // this is an object object
 147     array[item++] = new TestCase(   SECTION,
 148                                     "var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)",
 149                                     "Object]",
 150                                     eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)") );
 151
 152     // this is a function object
 153     array[item++] = new TestCase(   SECTION,
 154                                     "var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)",
 155                                     "Function]",
 156                                     eval("var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)") );
 157     // this is a number object
 158     array[item++] = new TestCase(   SECTION,
 159                                     "var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)",
 160                                     "NaN",
 161                                     eval("var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)") );
 162
 163     // this is the Math object
 164     array[item++] = new TestCase(   SECTION,
 165                                     "var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)",
 166                                     "ject Math]",
 167                                     eval("var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)") );
 168
 169     // this is a Boolean object
 170
 171     array[item++] = new TestCase(   SECTION,
 172                                     "var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())",
 173                                     "false",
 174                                     eval("var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())") );
 175
 176     // this is a user defined object
 177
 178     array[item++] = new TestCase( SECTION,
 179                                     "var obj = new MyObject( null ); obj.substring(0)",
 180                                     "null",
 181                                     eval( "var obj = new MyObject( null ); obj.substring(0)") );
 182
 183     return array;
 184 }
 185 function test() {
 186     for ( tc=0; tc < testcases.length; tc++ ) {
 187         testcases[tc].passed = writeTestCaseResult(
 188                             testcases[tc].expect,
 189                             testcases[tc].actual,
 190                             testcases[tc].description +" = "+
 191                             testcases[tc].actual );
 192
 193         testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
 194     }
 195     stopTest();
 196     return ( testcases );
 197 }
 198 function MyObject( value ) {
 199     this.value = value;
 200     this.substring = String.prototype.substring;
 201     this.toString = new Function ( "return this.value+''" );
 202 }