public function renderResetsFormActionUri()
{
$viewHelper = $this->getAccessibleMock(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, array('renderChildren'), array(), '', false);
$this->injectDependenciesIntoViewHelper($viewHelper);
$viewHelper->_set('formActionUri', 'someUri');
$this->viewHelperVariableContainerData = array(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class => array('formFieldNames' => array()));
$viewHelper->render('index');
$this->assertNull($viewHelper->_get('formActionUri'));
}