public function testFindUnsavedChildren()
{
$a = new Object("TestObject");
$b = new Object("TestObject");
$c = new Object("TestObject");
$a->set("likes", array($b, "foo"));
$b->set("likes", array($c, 42));
$c->set("likes", $a);
$unsavedChildren = $b->findUnsavedChildren();
$this->assertContains($c, $unsavedChildren);
$this->assertContains($a, $unsavedChildren);
// it should not contain $b
$this->assertNotContains($b, $unsavedChildren);
}