public function viewHelperUsesNumberFormatterOnGivenLocale()
{
$mockNumberFormatter = $this->getMockBuilder(\Neos\Flow\I18n\Formatter\NumberFormatter::class)->setMethods(array('formatCurrencyNumber'))->getMock();
$mockNumberFormatter->expects($this->once())->method('formatCurrencyNumber');
$this->inject($this->viewHelper, 'numberFormatter', $mockNumberFormatter);
$this->viewHelper->setArguments(array('forceLocale' => 'de_DE'));
$this->viewHelper->render('EUR', '#', '*');
}