protected function setUp() { $attribute = new Mage_Catalog_Model_Entity_Attribute(); $attribute->loadByCode('catalog_product', 'attribute_with_option'); foreach ($attribute->getSource()->getAllOptions() as $optionInfo) { if ($optionInfo['label'] == 'Option Label') { $this->_attributeOptionId = $optionInfo['value']; break; } } $this->_model = new Mage_Catalog_Model_Layer_Filter_Attribute(); $this->_model->setData(array('layer' => new Mage_Catalog_Model_Layer(), 'attribute_model' => $attribute)); }