public function testGetIdFieldname()
 {
     $data = 'MainTableName';
     $idFieldNameProperty = new \ReflectionProperty('Magento\\Framework\\Model\\ModelResource\\Db\\AbstractDb', '_idFieldName');
     $idFieldNameProperty->setAccessible(true);
     $idFieldNameProperty->setValue($this->_model, $data);
     $this->assertEquals($data, $this->_model->getIdFieldName());
 }
 public function testSetMainTable()
 {
     $setMainTableMethod = new \ReflectionMethod($this->_model, '_setMainTable');
     $setMainTableMethod->setAccessible(true);
     $tableName = $this->_model->getTable('store_website');
     $idFieldName = 'website_id';
     $setMainTableMethod->invoke($this->_model, $tableName);
     $this->assertEquals($tableName, $this->_model->getMainTable());
     $setMainTableMethod->invoke($this->_model, $tableName, $idFieldName);
     $this->assertEquals($tableName, $this->_model->getMainTable());
     $this->assertEquals($idFieldName, $this->_model->getIdFieldName());
 }