gecko/js/tests/ecma_3/Date/15.9.5.3.js

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/**
   File Name:          15.9.5.3.js
   ECMA Section: 15.9.5.3 Date.prototype.toDateString()
   Description:
   This function returns a string value. The contents of the string are
   implementation dependent, but are intended to represent the "date"
   portion of the Date in the current time zone in a convenient,
   human-readable form.   We can't test the content of the string, 
   but can verify that the string is parsable by Date.parse

   The toDateString function is not generic; it generates a runtime error
   if its 'this' value is not a Date object. Therefore it cannot be transferred
   to other kinds of objects for use as a method.

   Author:  pschwartau@netscape.com                            
   Date:      14 november 2000  (adapted from ecma/Date/15.9.5.2.js)
*/

var gTestfile = '15.9.5.3.js';
var SECTION = "15.9.5.3";
var VERSION = "ECMA_3"; 
var TITLE   = "Date.prototype.toDateString()"; 
  
var status = '';
var actual = ''; 
var expect = '';


startTest();
writeHeaderToLog( SECTION + " "+ TITLE);

// first, some generic tests -

status = "typeof (now.toDateString())"; 
actual =   typeof (now.toDateString());
expect = "string";
addTestCase();

status = "Date.prototype.toDateString.length";  
actual =  Date.prototype.toDateString.length;
expect =  0;  
addTestCase();

/*
 * Date.parse is accurate to the second; valueOf() to the millisecond.
 * Here we expect them to coincide, as we expect a time of exactly
 * midnight -
 */
status = "(Date.parse(now.toDateString()) - (midnight(now)).valueOf()) == 0";  
actual =   (Date.parse(now.toDateString()) - (midnight(now)).valueOf()) == 0;
expect = true;
addTestCase();



// 1970
addDateTestCase(0);
addDateTestCase(TZ_ADJUST);  

  
// 1900
addDateTestCase(TIME_1900);
addDateTestCase(TIME_1900 - TZ_ADJUST);

  
// 2000
addDateTestCase(TIME_2000);
addDateTestCase(TIME_2000 - TZ_ADJUST);

   
// 29 Feb 2000
addDateTestCase(UTC_29_FEB_2000);
addDateTestCase(UTC_29_FEB_2000 - 1000);   
addDateTestCase(UTC_29_FEB_2000 - TZ_ADJUST);


// 2005
addDateTestCase(UTC_1_JAN_2005);
addDateTestCase(UTC_1_JAN_2005 - 1000);
addDateTestCase(UTC_1_JAN_2005 - TZ_ADJUST);
  


//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------


function addTestCase()
{
  new TestCase(
    SECTION,
    status,
    expect,
    actual);
}

function addDateTestCase(date_given_in_milliseconds)
{
  var givenDate = new Date(date_given_in_milliseconds);

  status = 'Date.parse('   +   givenDate   +   ').toDateString())';  
  actual =  Date.parse(givenDate.toDateString());
  expect = Date.parse(midnight(givenDate));
  addTestCase();
}


function midnight(givenDate)
{
  // midnight on the given date -
  return new Date(givenDate.getFullYear(), givenDate.getMonth(), givenDate.getDate());
}