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: 15.5.4.4-1.js 24 ECMA Section: 15.5.4.4 String.prototype.charAt(pos) 25 Description: Returns a string containing the character at position 26 pos in the string. If there is no character at that 27 string, the result is the empty string. The result is 28 a string value, not a String object. 29 30 When the charAt method is called with one argument, 31 pos, the following steps are taken: 32 1. Call ToString, with this value as its argument 33 2. Call ToInteger pos 34 3. Compute the number of characters in Result(1) 35 4. If Result(2) is less than 0 is or not less than 36 Result(3), return the empty string 37 5. Return a string of length 1 containing one character 38 from result (1), the character at position Result(2). 39 40 Note that the charAt function is intentionally generic; 41 it does not require that its this value be a String 42 object. Therefore it can be transferred to other kinds 43 of objects for use as a method. 44 45 Author: christine (at) netscape.com 46 Date: 2 october 1997 47 */ 48 var SECTION = "15.5.4.4-2"; 49 var VERSION = "ECMA_1"; 50 startTest(); 51 var TITLE = "String.prototype.charAt"; 52 53 writeHeaderToLog( SECTION + " "+ TITLE); 54 55 var testcases = getTestCases(); 56 test(); 57 58 function getTestCases() { 59 var array = new Array(); 60 var item = 0; 61 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(0)", "t", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(0)") ); 62 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(1)", "r", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(1)") ); 63 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(2)", "u", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(2)") ); 64 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(3)", "e", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(3)") ); 65 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(4)", "", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(4)") ); 66 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(-1)", "", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(-1)") ); 67 68 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(true)", "r", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(true)") ); 69 array[item++] = new TestCase( SECTION, "x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(false)", "t", eval("x = new Boolean(true); x.charAt=String.prototype.charAt;x.charAt(false)") ); 70 71 array[item++] = new TestCase( SECTION, "x = new String(); x.charAt(0)", "", eval("x=new String();x.charAt(0)") ); 72 array[item++] = new TestCase( SECTION, "x = new String(); x.charAt(1)", "", eval("x=new String();x.charAt(1)") ); 73 array[item++] = new TestCase( SECTION, "x = new String(); x.charAt(-1)", "", eval("x=new String();x.charAt(-1)") ); 74 75 array[item++] = new TestCase( SECTION, "x = new String(); x.charAt(NaN)", "", eval("x=new String();x.charAt(Number.NaN)") ); 76 array[item++] = new TestCase( SECTION, "x = new String(); x.charAt(Number.POSITIVE_INFINITY)", "", eval("x=new String();x.charAt(Number.POSITIVE_INFINITY)") ); 77 array[item++] = new TestCase( SECTION, "x = new String(); x.charAt(Number.NEGATIVE_INFINITY)", "", eval("x=new String();x.charAt(Number.NEGATIVE_INFINITY)") ); 78 79 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(0)", "1", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(0)") ); 80 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(1)", "2", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(1)") ); 81 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(2)", "3", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(2)") ); 82 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(3)", "4", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(3)") ); 83 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(4)", "5", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(4)") ); 84 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(5)", "6", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(5)") ); 85 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(6)", "7", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(6)") ); 86 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(7)", "8", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(7)") ); 87 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(8)", "9", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(8)") ); 88 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(9)", "0", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(9)") ); 89 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(10)", "", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(10)") ); 90 91 array[item++] = new TestCase( SECTION, "var MYOB = new MyObject(1234567890); MYOB.charAt(Math.PI)", "4", eval("var MYOB = new MyObject(1234567890); MYOB.charAt(Math.PI)") ); 92 93 // MyOtherObject.toString will return "[object Object] 94 95 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(0)", "[", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(0)") ); 96 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(1)", "o", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(1)") ); 97 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(2)", "b", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(2)") ); 98 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(3)", "j", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(3)") ); 99 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(4)", "e", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(4)") ); 100 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(5)", "c", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(5)") ); 101 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(6)", "t", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(6)") ); 102 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(7)", " ", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(7)") ); 103 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(8)", "O", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(8)") ); 104 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(9)", "b", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(9)") ); 105 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(10)", "j", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(10)") ); 106 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(11)", "e", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(11)") ); 107 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(12)", "c", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(12)") ); 108 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(13)", "t", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(13)") ); 109 array[item++] = new TestCase( SECTION, "var MYOB = new MyOtherObject(1234567890); MYOB.charAt(14)", "]", eval("var MYOB = new MyOtherObject(1234567890); MYOB.charAt(14)") ); 110 111 return (array ); 112 } 113 114 function test() { 115 for ( tc = 0; tc < testcases.length; tc++ ) { 116 testcases[tc].passed = writeTestCaseResult( 117 testcases[tc].expect, 118 testcases[tc].actual, 119 testcases[tc].description +" = "+ 120 testcases[tc].actual ); 121 122 testcases[tc].reason += ( testcases[tc].passed ) 123 ? "" 124 : "wrong value " 125 } 126 127 stopTest(); 128 return ( testcases ); 129 } 130 131 function MyObject( value ) { 132 this.value = value; 133 this.valueOf = new Function( "return this.value;" ); 134 this.toString = new Function( "return this.value +''" ); 135 this.charAt = String.prototype.charAt; 136 } 137 function MyOtherObject(value) { 138 this.value = value; 139 this.valueOf = new Function( "return this.value;" ); 140 this.charAt = String.prototype.charAt; 141 } 142
