public function renderTests($expectedResult, array $flashMessages = [], $class = null)
{
$this->mockFlashMessageContainer->expects($this->once())->method('getMessagesAndFlush')->will($this->returnValue($flashMessages));
$this->mockTagBuilder->expects($this->once())->method('setContent')->with($expectedResult);
$this->viewHelper->_set('arguments', ['class' => $class]);
$this->viewHelper->render();
}