public function testRecoForJohn()
{
$engine = $this->recoService->getRecommender('find_friends');
$john = $this->getUserNode('John');
$recommendations = $engine->recommend($john, new SimpleContext());
$recommendations->sort();
$this->assertEquals(2, $recommendations->size());
$this->assertNull($recommendations->getItemBy('name', 'John'));
$recoForMarc = $recommendations->getItemBy('name', 'marc');
$this->assertEquals(1, $recoForMarc->totalScore());
$recoForBill = $recommendations->getItemBy('name', 'Bill');
$this->assertEquals(2, $recoForBill->totalScore());
}