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/
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.
11 * The Original Code is Mozilla Communicator client code, released March
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
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.
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
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).
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.
45 Author: christine@netscape.com
48 var SECTION = "15.5.4.4-2";
49 var VERSION = "ECMA_1";
51 var TITLE = "String.prototype.charAt";
53 writeHeaderToLog( SECTION + " "+ TITLE);
55 var testcases = getTestCases();
58 function getTestCases() {
59 var array = new Array();
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)") );
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)") );
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)") );
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)") );
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)") );
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)") );
93 // MyOtherObject.toString will return "[object Object]
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)") );
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 );
122 testcases[tc].reason += ( testcases[tc].passed )
128 return ( testcases );
131 function MyObject( value ) {
133 this.valueOf = new Function( "return this.value;" );
134 this.toString = new Function( "return this.value +''" );
135 this.charAt = String.prototype.charAt;
137 function MyOtherObject(value) {
139 this.valueOf = new Function( "return this.value;" );
140 this.charAt = String.prototype.charAt;