public function testTree()
{
$data = ['aaa' => 42, 'bbb' => ['x' => 11, 'y' => ['k' => 'AAA', 'm' => 22]], 'ccc' => 'VVV'];
$tree = new Node($this->toNode($data));
$exp = $data;
$v1 = $tree->get('aaa');
$this->assertEquals(42, $v1);
$v2 = $tree->get('bbb.x');
$this->assertEquals(11, $v2);
$v3 = $tree->get('bbb.unknown');
$this->assertEquals(null, $v3);
$tree->set('nnn', 'NEW');
$exp['nnn'] = 'NEW';
$tree->set('mmm.also', 'NEW');
$exp['mmm']['also'] = 'NEW';
// $this->dumpObject($tree->getData());
}