public function testDateTimeModified()
{
$dateTime = "2015-09-27 17:37:19";
$dateTimeObject = new \DateTime($dateTime);
$test = new \Timing();
$test->setId(3)->setDateTime($dateTime);
$this->asserttrue($test->isModified(), "The datetime has been set the first time and need to be modified!");
$test->save();
$test->setDateTime($dateTime);
$this->assertfalse($test->isModified(), "The datetime has been marked as modified, although it was provided with the same datetime string as before!");
$dateTimeObject->modify('+4 hours');
$test->setDateTime($dateTimeObject);
$this->asserttrue($test->isModified(), "The time has been not modified!");
$test->save();
$dateTimeObject->modify('+7 days');
$test->setDateTime($dateTimeObject);
$this->asserttrue($test->isModified(), "The date has been not modified!");
$test->save();
$test->setDateTime(null);
$this->asserttrue($test->isModified(), "The datetime has been not modified and not set to null!");
$test->save();
$this->assertnull($test->getDateTime(), "The datetime was not set to null!");
$test->setDateTime($dateTimeObject);
$this->asserttrue($test->isModified(), "The datetime has not been modified!");
$test->save();
}