eZ\Bundle\EzPublishCoreBundle\Imagine\IORepositoryResolver::isStored PHP Method

    public function isStored($path, $filter)
    {
        return $this->ioService->exists($this->getFilePath($path, $filter));
    }

 public function testIsStoredImageDoesntExist()
 {
     $filter = 'thumbnail';
     $path = 'Tardis/bigger/in-the-inside/RiverSong.jpg';
     $aliasPath = 'Tardis/bigger/in-the-inside/RiverSong_thumbnail.jpg';
     $this->ioService->expects($this->once())->method('exists')->with($aliasPath)->will($this->returnValue(false));
     $this->assertFalse($this->imageResolver->isStored($path, $filter));
 }