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/* -*- 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: 15.5.4.4-3.js
ECMA Section: 15.5.4.4 String.prototype.charAt(pos)
Description: Returns a string containing the character at position
pos in the string. If there is no character at that
string, the result is the empty string. The result is
a string value, not a String object.
When the charAt method is called with one argument,
pos, the following steps are taken:
1. Call ToString, with this value as its argument
2. Call ToInteger pos
3. Compute the number of characters in Result(1)
4. If Result(2) is less than 0 is or not less than
Result(3), return the empty string
5. Return a string of length 1 containing one character
from result (1), the character at position Result(2).
Note that the charAt function is intentionally generic;
it does not require that its this value be a String
object. Therefore it can be transferred to other kinds
of objects for use as a method.
This tests assiging charAt to a user-defined function.
Author: christine@netscape.com
Date: 2 october 1997
*/
var SECTION = "15.5.4.4-3";
var VERSION = "ECMA_1";
startTest();
var TITLE = "String.prototype.charAt";
writeHeaderToLog( SECTION + " "+ TITLE);
var foo = new MyObject('hello');
new TestCase( SECTION, "var foo = new MyObject('hello'); ", "h", foo.charAt(0) );
new TestCase( SECTION, "var foo = new MyObject('hello'); ", "e", foo.charAt(1) );
new TestCase( SECTION, "var foo = new MyObject('hello'); ", "l", foo.charAt(2) );
new TestCase( SECTION, "var foo = new MyObject('hello'); ", "l", foo.charAt(3) );
new TestCase( SECTION, "var foo = new MyObject('hello'); ", "o", foo.charAt(4) );
new TestCase( SECTION, "var foo = new MyObject('hello'); ", "", foo.charAt(-1) );
new TestCase( SECTION, "var foo = new MyObject('hello'); ", "", foo.charAt(5) );
var boo = new MyObject(true);
new TestCase( SECTION, "var boo = new MyObject(true); ", "t", boo.charAt(0) );
new TestCase( SECTION, "var boo = new MyObject(true); ", "r", boo.charAt(1) );
new TestCase( SECTION, "var boo = new MyObject(true); ", "u", boo.charAt(2) );
new TestCase( SECTION, "var boo = new MyObject(true); ", "e", boo.charAt(3) );
var noo = new MyObject( Math.PI );
new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "3", noo.charAt(0) );
new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", ".", noo.charAt(1) );
new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "1", noo.charAt(2) );
new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "4", noo.charAt(3) );
new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "1", noo.charAt(4) );
new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "5", noo.charAt(5) );
new TestCase( SECTION, "var noo = new MyObject(Math.PI); ", "9", noo.charAt(6) );
test();
function MyObject (v) {
this.value = v;
this.toString = new Function( "return this.value +'';" );
this.valueOf = new Function( "return this.value" );
this.charAt = String.prototype.charAt;
}
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