public function testGetDirFormat()
{
$strategy = new DatetimeNamingStrategy();
$this->assertEquals(DatetimeNamingStrategy::FORMAT_DIR_YEAR_MONTH, $strategy->getDirFormat());
$strategy = new DatetimeNamingStrategy(DatetimeNamingStrategy::FORMAT_DIR_YEAR_MONTH_DAY);
$this->assertEquals(DatetimeNamingStrategy::FORMAT_DIR_YEAR_MONTH_DAY, $strategy->getDirFormat());
}