public function testSetProperties()
{
$node = new Node(null, [], null, ['a' => 1, 'b' => 2]);
$node2 = new Node();
$node2->setProperties(['c' => 3, 'd' => 4]);
$this->assertEquals(['a' => 1, 'b' => 2], $node->getProperties());
$this->assertEquals(['c' => 3, 'd' => 4], $node2->getProperties());
}
