public function testGetSetCompletedDateEmptyString()
 {
     $this->assertEmpty($this->task->getDateAsString('completedDate'));
     $expectedDate = new \DateTime();
     $this->task->setDefaultDateFromString('', 'completedDate');
     $returnedDate = $this->task->getCompletedDate();
     $this->assertEquals($expectedDate->format(OPGDateFormat::getDateTimeFormat()), $returnedDate->format(OPGDateFormat::getDateTimeFormat()));
 }