public function testApply()
 {
     $filter = '10-150';
     $requestVar = 'test_request_var';
     $this->target->setRequestVar($requestVar);
     $this->request->expects($this->exactly(1))->method('getParam')->will($this->returnCallback(function ($field) use($requestVar, $filter) {
         $this->assertTrue(in_array($field, [$requestVar, 'id']));
         return $filter;
     }));
     $attributeCode = 'AttributeCode';
     $this->attribute->expects($this->any())->method('getAttributeCode')->will($this->returnValue($attributeCode));
     $this->fulltextCollection->expects($this->once())->method('addFieldToFilter')->with($attributeCode)->will($this->returnSelf());
     $this->target->apply($this->request);
 }