public function testChangeHasOneRelationWithAnotherObject()
{
$dummy_a = new DummyModel();
$dummy_b = new DummyModel();
$dummy_a->save();
$dummy_b->save();
$dummy_a->children = $dummy_b;
$dummy_b->children = $dummy_a;
$this->assertTrue($dummy_a->save(), 'Dummy A could not be saved');
$this->assertTrue($dummy_b->save(), 'Dummy B could not be saved');
$dummy_c = new DummyModel();
$dummy_a->children = $dummy_c;
$this->assertTrue($dummy_a->save(), 'Dummy A could not be saved');
}
