/**
* {@inheritdoc}
*
* Store grid representation of terrains.
*/
public function addChild(Thing $child)
{
if (!$child instanceof Terrain) {
throw new \Exception('Cannot attach something else than Terrain to World');
}
//@todo
return parent::addChild($child);
}
/**
* Test parentship from a parent viewpoint
* AddChild and RemoveChild updates both sides of the relation.
*/
public function testAddChildRemoveChild()
{
$child = new Thing();
$parent = new Thing();
$parent->addChild($child);
$this->assertSame($parent, $child->getParent());
$this->assertContains($child, $parent->getChildren());
$parent->removeChild($child);
$this->assertNull($child->getParent());
$this->assertNotContains($child, $parent->getChildren());
}
