tests/mozilla/ecma_2/Exceptions/number-003.js

   1 /**
   2     File Name:          number-003.js
   3     Corresponds To:     15.7.4.3-3.js
   4     ECMA Section:       15.7.4.3.1 Number.prototype.valueOf()
   5     Description:
   6     Returns this number value.
   7
   8     The valueOf function is not generic; it generates a runtime error if its
   9     this value is not a Number object. Therefore it cannot be transferred to
  10     other kinds of objects for use as a method.
  11
  12     Author:             christine@netscape.com
  13     Date:               16 september 1997
  14 */
  15     var SECTION = "number-003";
  16     var VERSION = "JS1_4";
  17     var TITLE   = "Exceptions for Number.valueOf()";
  18
  19     var tc = 0;
  20     var testcases = new Array();
  21
  22     startTest();
  23     writeHeaderToLog( SECTION + " Number.prototype.valueOf()");
  24
  25     var result = "Failed";
  26     var exception = "No exception thrown";
  27     var expect = "Passed";
  28
  29     try {
  30         VALUE_OF = Number.prototype.valueOf;
  31         OBJECT = new String("Infinity");
  32         OBJECT.valueOf = VALUE_OF;
  33         result = OBJECT.valueOf();
  34     } catch ( e ) {
  35         result = expect;
  36         exception = e.toString();
  37     }
  38
  39     testcases[tc++] = new TestCase(
  40         SECTION,
  41         "Assigning Number.prototype.valueOf as the valueOf of a String object " +
  42         " (threw " + exception +")",
  43         expect,
  44         result );
  45
  46     test();
  47