/** * Returns yaml loader model instance * * @param string|null $testCaseClass * @return EcomDev_PHPUnit_Model_Yaml_Loader */ public static function getYamlLoader($testCaseClass = null) { if ($testCaseClass !== null) { self::$yamlLoaderModelAlias = self::getLoadableClassAlias($testCaseClass, 'yaml', self::XML_PATH_DEFAULT_YAML_LOADER_MODEL); } elseif (self::$yamlLoaderModelAlias === null) { self::$yamlLoaderModelAlias = self::getLoadableClassAlias(get_called_class(), 'yaml', self::XML_PATH_DEFAULT_YAML_LOADER_MODEL); } return Mage::getSingleton(self::$yamlLoaderModelAlias); }