public function test_getPeriodCurrent()
 {
     /** === Test Data === */
     $DATE = '2015-01-05 18:00:00';
     /** === Call and asserts  === */
     $this->assertEquals('20150105', $this->obj->getPeriodCurrent($DATE, Period::TYPE_DAY, false));
     $this->assertEquals('20150106', $this->obj->getPeriodCurrent($DATE, Period::TYPE_DAY));
     $this->assertEquals('20150111', $this->obj->getPeriodCurrent($DATE, Period::TYPE_WEEK));
     $this->assertEquals('20150111', $this->obj->getPeriodCurrent('2015-01-11 14:32:32', Period::TYPE_WEEK));
     $this->assertEquals('201501', $this->obj->getPeriodCurrent($DATE, Period::TYPE_MONTH));
     $this->assertEquals('2015', $this->obj->getPeriodCurrent($DATE, Period::TYPE_YEAR));
 }