$child_node = $this->getNodeByTitle($child_title);
if ($this->assertNotNull($child_node)) {
$this->assertEqual($host_node->single[0]->target_id, $child_node->id(), 'Child node is referenced');
$child_node = $this->getNodeByTitle($child_title);
if ($this->assertNotNull($child_node)) {
$this->assertEqual($host_node->single[0]->target_id, $child_node->id(), 'Child node is referenced');