public function renderAddsSpecifiedPrefixToTemplateVariableContainer()
{
$prefix = 'somePrefix';
$viewHelper = $this->getAccessibleMock(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, array('renderChildren', 'renderHiddenIdentityField', 'renderHiddenReferrerFields', 'addFormFieldNamesToViewHelperVariableContainer', 'removeFormFieldNamesFromViewHelperVariableContainer', 'addEmptyHiddenFieldNamesToViewHelperVariableContainer', 'removeEmptyHiddenFieldNamesFromViewHelperVariableContainer', 'renderEmptyHiddenFields', 'renderTrustedPropertiesField'), array(), '', false);
$this->arguments['fieldNamePrefix'] = $prefix;
$this->injectDependenciesIntoViewHelper($viewHelper);
$this->securityContext->expects($this->any())->method('isInitialized')->will($this->returnValue(false));
$this->viewHelperVariableContainer->expects($this->once())->method('add')->with(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, 'fieldNamePrefix', $prefix);
$this->viewHelperVariableContainer->expects($this->once())->method('remove')->with(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, 'fieldNamePrefix');
$viewHelper->render('index');
}