/** * @param $paramToClear * @dataProvider clearHelperDataDataProvider */ public function testClearHelperData($paramToClear) { $storage = new \Magento\Framework\Session\Storage('default', [$paramToClear => 'test_data']); $this->_session = $this->_helper->getObject('Magento\\Checkout\\Model\\Session', ['storage' => $storage]); $this->_session->clearHelperData(); $this->assertNull($this->_session->getData($paramToClear)); }