<?php

require_once 'phpunit-1.3.3/PHPUnit/TestCase.php';

class MiscTests extends PHPUnit_TestCase
{
	/**
	 * Tests the conversion from 'numer of days ago' to a unix timestamp.
	 * the function supports rounding to midnight and takes the user time zone into account.
	 */
	function test_fs_days_ago_to_unix_time()
	{
		// PHP BUG on PHP 5.2.5-3 with Suhosin-Patch 0.9.6.2
		// echo date('j M o H:i', strtotime("2 Jan 2000 08:00")); // -> 2 Jan 1999 08:00
		 
		require_once FS_ABS_PATH.'/php/db-sql.php';
 		$this->assertDatesEquals("1 Jan 2001 08:00", fs_days_ago_to_unix_time(1, false, strtotime("2 Jan 2001 08:00")));
		$this->assertDatesEquals("1 Jan 2001 00:00", fs_days_ago_to_unix_time(1, false, strtotime("2 Jan 2001 00:00")));
		$this->assertDatesEquals("1 Jan 2001 00:00", fs_days_ago_to_unix_time(1, true,  strtotime("1 Jan 2001 00:00")));
		$this->assertDatesEquals("1 Jan 2001 00:00", fs_days_ago_to_unix_time(1, true,  strtotime("1 Jan 2001 00:01")));
		$this->assertDatesEquals("1 Jan 2001 00:00", fs_days_ago_to_unix_time(1, true,  strtotime("1 Jan 2001 23:59")));
		$this->assertDatesEquals("1 Feb 2008 00:00", fs_days_ago_to_unix_time(5, true,  strtotime("5 Feb 2008 23:59")));

		// with time zones
		// same timezone
		$this->assertDatesEquals("1 Jan 2001 00:00", fs_days_ago_to_unix_time(1, true,  strtotime("1 Jan 2001 00:00"), "+0:0","+0:0"));
		$this->assertDatesEquals("1 Jan 2001 00:00", fs_days_ago_to_unix_time(1, true,  strtotime("1 Jan 2001 00:00"), "+1:0","+1:0"));
		
		// Different time zone.
		// We want to return a time that is midnight for the user, but the time is at the server time zone.
		// This is the explnation for the first test:
		// Server time is 1 Jan 2001 03:00,
		// User is at +2 hours offset, so user time is 1 Jan 2001 05:00,
		// This means that for the user, midnight is 5 hours ago.
		// so we return 31 Dec 2000 22:00, which is 5 hours ago in server time.
		$this->assertDatesEquals("31 Dec 2000 22:00", fs_days_ago_to_unix_time(1, true,  strtotime("1 Jan 2001 03:00"), "+2:0","+0:0"));
		$this->assertDatesEquals("1 Jan 2001 14:00",  fs_days_ago_to_unix_time(1, true,  strtotime("2 Jan 2001 08:00"), "+10:0","+0:0"));
		$this->assertDatesEquals("2 Jan 2001 05:00", fs_days_ago_to_unix_time(1, true,  strtotime("2 Jan 2001 21:00"), "-5:0","+0:0"));
		$this->assertDatesEquals("31 Dec 2000 21:00", fs_days_ago_to_unix_time(1, true,  strtotime("1 Jan 2001 03:00"), "+2:0","-1:0"));
	}

	function assertDatesEquals($expected_date_str, $actual_date_unixtime)
	{
		$this->assertEquals($expected_date_str, date('j M Y H:i', $actual_date_unixtime));
	}
	
}
?>