public function testDateModified()
{
$date = "2015-03-28";
$dateObject = new \DateTime($date);
$test = new \Timing();
$test->setId(2)->setDate($date);
$this->asserttrue($test->isModified(), "The date has been set the first time and need to be modified!");
$test->save();
$test->setDate($date);
$this->assertfalse($test->isModified(), "The date has been marked as modified, although it was provided with the same date string as before!");
$dateObject->modify('+4 hours');
$test->setDate($dateObject);
$this->assertfalse($test->isModified(), "The time was modified, but not the date!");
$dateObject->modify('+7 days');
$test->setDate($dateObject);
$this->asserttrue($test->isModified(), "The date has been not modified!");
$test->save();
$test->setDate(null);
$this->asserttrue($test->isModified(), "The date has been not modified and not set to null!");
$test->save();
$this->assertnull($test->getDate(), "The date was not set to null!");
$test->setDate($dateObject);
$this->asserttrue($test->isModified(), "The date has not been modified!");
$test->save();
}