public function testIsChild()
{
$parent = new Node();
$child1 = new Node();
$child2 = new Node();
$child1->setParent($parent);
$child2->setParent($child1);
$this->assertTrue($parent->isChild($child1->id()));
$this->assertTrue($parent->isDescendant($child2->id()));
$this->assertFalse($parent->isChild($child2->id()));
}
public function testPreviousSibling()
{
$parent = new Node();
$child = new Node();
$child2 = new Node();
$child->setParent($parent);
$child2->setParent($parent);
$this->assertEquals($child->id(), $child2->previousSibling()->id());
}
public function testGetChildren()
{
$parent = new Node();
$child = new Node();
$child2 = new Node();
$child->setParent($parent);
$child2->setParent($parent);
$this->assertEquals($child->id(), $parent->getChildren()[0]->id());
}
public function testGetGreatAncestor()
{
$parent = new Node();
$child = new Node();
$child2 = new Node();
$parent->addChild($child);
$child->addChild($child2);
$ancestor = $child2->getAncestor($parent->id());
$this->assertEquals($parent->id(), $ancestor->id());
}