def test_set_setting_should_set_setting(self, mock_VideoCapture):
mock_video_capture = mock_VideoCapture.return_value
mock_video_capture.get.return_value = 1.0
expected_image = Mock()
expected_image.shape = (10, 20, 3)
mock_video_capture.read.return_value = (True, expected_image)
camera = Camera()
camera.start()
camera.set_setting('Hue', 1.0)
mock_video_capture.set.assert_called_once_with(cv2.CAP_PROP_HUE, 1.0)
def test_set_setting_should_raise_exception_if_setting_not_in_list(
self, mock_VideoCapture):
mock_video_capture = mock_VideoCapture.return_value
mock_video_capture.get.return_value = 1.0
expected_image = Mock()
expected_image.shape = (10, 20, 3)
mock_video_capture.read.return_value = (True, expected_image)
camera = Camera()
camera.start()
with self.assertRaises(Exception):
camera.set_setting('Pizza', 1.0)
def test_set_setting_should_raise_exception_if_camera_not_started(
self, mock_VideoCapture):
camera = Camera()
with self.assertRaises(Exception):
camera.set_setting('Hue', '1.0')
