public function testAddToEntityList()
 {
     $dataItem = DIWikiPage::newFromText('Foo');
     $this->query->expects($this->any())->method('getQueryId')->will($this->returnValue('FOO:123'));
     $instance = new EntityListAccumulator($this->query);
     $instance->pruneEntityList();
     $instance->addToEntityList($dataItem);
     $this->assertEquals(array('Foo#0#' => $dataItem), $instance->getEntityList('FOO:123'));
     $instance->pruneEntityList();
     $this->assertEmpty($instance->getEntityList());
 }