NodeTest::testHasSiblingsForNodesAtLevelThree PHP Method

    public function testHasSiblingsForNodesAtLevelThree()
    {
        $parent = NodeFactory::getInstance();
        $child = NodeFactory::getInstance();
        $parent->addChild($child);
        $grandChild = NodeFactory::getInstance();
        $child->addChild($grandChild);
        $greatGrandChild = NodeFactory::getInstance();
        $grandChild->addChild($greatGrandChild);
        // Should return false for node that are two levels deeps
        $this->assertEquals(false, $grandChild->hasSiblings());
        // Should return true for node that are three levels deeps
        $this->assertEquals(true, $greatGrandChild->hasSiblings());
    }