protected function setUp() { parent::setUp(); $this->mockContentObject = $this->getMock(ContentObjectRenderer::class, array(), array(), '', false); $this->viewHelper = $this->getMock(\TYPO3\CMS\Fluid\ViewHelpers\Format\CropViewHelper::class, array('renderChildren')); $renderingContext = $this->getMock(\TYPO3\CMS\Fluid\Tests\Unit\Core\Rendering\RenderingContextFixture::class); $this->viewHelper->setRenderingContext($renderingContext); $this->viewHelper->expects($this->once())->method('renderChildren')->will($this->returnValue('Some Content')); }