Failure of helper mock

controller test.php

	public function testIcsViewId() {
		$Shifts = $this->generate('Shifts', array(
		    'methods' => array(
		    		'iCal'
		    		)
		));

		App::uses('View', 'View');
		App::uses('iCalHelper', 'View/Helper');
		$View = new View();

		$Shifts->iCal = new iCalHelper($View);

		$Shifts->iCal->expects($this->once())
			->method('render')
			->will($this->returnValue(true));

		$result = $this->testAction('/shifts/icsView/id:1');
//		debug($result);
	}