def test_compute_always_calls_compute_on_extractor_for_opecv2(self):
OpencvDetectorInterface.OPENCV_MAJOR = "2"
image = Mock()
keypoints = Mock()
extractor = Mock()
extractor.compute = Mock(return_value = ([],[]))
interface = OpencvDetectorInterface()
interface.compute(image, keypoints, extractor, Mock())
extractor.compute.assert_called_once_with(image, keypoints)
def test_opecv3_when_extractor_is_none_than_compute_called_on_detector(self):
OpencvDetectorInterface.OPENCV_MAJOR = "3"
image = Mock()
keypoints = Mock()
extractor = None
detector = Mock()
#extractor.compute = Mock(return_value=([], []))
detector.compute = Mock(return_value=([], []))
interface = OpencvDetectorInterface()
interface.compute(image, keypoints, extractor, detector)
detector.compute.assert_called_once_with(image, keypoints)