public function itReturnsTheChildrenAndSubChildrenAsAFlatList()
{
$child1 = new TreeNode();
$subchild1 = new TreeNode();
$child1->addChild($subchild1);
$child2 = new TreeNode();
$node = new TreeNode();
$node->addChild($child1);
$node->addChild($child2);
$this->assertEqual(array($child1, $subchild1, $child2), $node->flattenChildren());
}
