public function testGetImportantPartFromLegacyModeInvalidMode()
{
$imageMock = $this->getMock('Contao\\Image\\ImageInterface');
$imageFactory = $this->createImageFactory();
$this->setExpectedException('InvalidArgumentException', 'not a legacy resize mode');
$imageFactory->getImportantPartFromLegacyMode($imageMock, 'invalid');
}