public function getPipelineShouldReturnOnlyElementsOfGivenType()
{
$filter = $this->getMockFilter();
$converter = $this->getMockConverter();
$this->workflow->addFilter($filter);
$this->workflow->addConverter($converter);
$this->assertCount(1, $this->workflow->getPipeline('Plum\\Plum\\Pipe\\FilterPipe'));
}