public function testOnlyUpdatesWhatChanged()
{
$user = $this->objectManager->find($this->userClassName, 1);
$user->setUsername('changed');
$this->usersTester->set(1, 'password', 'changed password');
$this->objectManager->flush();
$this->objectManager->clear();
$user = $this->objectManager->find($this->userClassName, 1);
$this->assertEquals('changed', $user->getUsername());
$data = $this->usersTester->find(1);
$this->assertEquals('changed password', $data['password']);
}