/**
* @group functional
*/
public function testHistogramAggregation()
{
$agg = new Histogram('hist', 'price', 10);
$agg->setMinimumDocumentCount(0);
// should return empty buckets
$query = new Query();
$query->addAggregation($agg);
$results = $this->_getIndexForTest()->search($query)->getAggregation('hist');
$buckets = $results['buckets'];
$this->assertEquals(5, sizeof($buckets));
$this->assertEquals(30, $buckets[3]['key']);
$this->assertEquals(2, $buckets[3]['doc_count']);
}