public function testRemoveFilterByFilterObject()
 {
     $filter = new FilterAttribute('bob', [34]);
     $this->object->setIndex(new TestIndex());
     $this->object->addFilter($filter);
     $this->assertCount(1, $this->object->getFilters());
     $this->object->removeFilter($filter);
     $this->assertCount(0, $this->object->getFilters());
 }