public function testMethodChaining()
{
$node = DataSources::getNode();
$node->setPart('some_part')->addFilter('some_filter')->setCondition('some_condition')->addFilter('some_other_filter')->setPart('some_other_part');
$this->assertEquals('some_other_part', $node->getPart());
$this->assertEquals('some_condition', $node->getCondition());
$this->assertEquals(array('some_filter', 'some_other_filter'), $node->getFilters());
}
