/**
* test for getDayStartEndGMT
* @dataProvider dayDataSet
*/
public function testGetDayStartEnd($date, $start, $end, $tz)
{
$this->_setPrefs('m/d/Y', '', $tz);
$date_arr = explode("-", $date);
$date = $date_arr[1] . '/' . $date_arr[2] . '/' . $date_arr[0];
$dates = $this->time_date->getDayStartEndGMT($date);
$this->assertEquals($start, $dates["start"], "Bad min result for {$date} tz {$tz}");
$this->assertEquals($end, $dates["end"], "Bad max result for {$date} tz {$tz}");
}