public function testGetPreviewUrl()
{
$item = $this->prophesize('core_kernel_classes_Resource');
$itemModelProphecy = $this->prophesize('core_kernel_classes_Resource');
$itemModelProphecy->getPropertyValues(new core_kernel_classes_Property(PROPERTY_ITEM_MODEL_SERVICE))->willReturn(array());
$itemModel = $itemModelProphecy->reveal();
$this->assertNull($this->itemsService->getPreviewUrl($item->reveal()));
}