Neos\Flow\Tests\Unit\Mvc\Controller\AbstractControllerTest::addFlashMessageThrowsExceptionOnInvalidMessageBody PHP Method

    public function addFlashMessageThrowsExceptionOnInvalidMessageBody()
    {
        $flashMessageContainer = new FlashMessageContainer();
        $controller = $this->getAccessibleMock(AbstractController::class, ['processRequest']);
        $this->inject($controller, 'flashMessageContainer', $flashMessageContainer);
        $controller->addFlashMessage(new \stdClass());
    }