paulzi / yii2-nested-sets

        $this->assertEquals($data, array_map(function ($value) { return $value->id; }, MultipleTreeNode::findOne(1)->getLeaves(2)->all()));

    }

    public function testGetPrev()

    {

        $this->assertEquals(11, Node::findOne(12)->prev->id);

        $this->assertEquals(11, MultipleTreeNode::findOne(12)->prev->id);

        $this->assertEquals(null, Node::findOne(20)->getPrev()->one());

        $this->assertEquals(null, MultipleTreeNode::findOne(20)->getPrev()->one());

    }

    public function testGetNext()

    {

        $this->assertEquals(null, MultipleTreeNode::findOne(20)->getPrev()->one());

    }

    public function testGetNext()

    {

        $this->assertEquals(13, Node::findOne(12)->next->id);

        $this->assertEquals(13, MultipleTreeNode::findOne(12)->next->id);

        $this->assertEquals(null, Node::findOne(19)->getNext()->one());

        $this->assertEquals(null, MultipleTreeNode::findOne(19)->getNext()->one());

    }

    public function testPopulateTree()

    {