class TestCameraStreamReader(object):
SAMPLE_CAMERA_ID = 0
SAMPLE_IMAGE_SIZE = Vector2(10, 10)
@classmethod
def setup_class(cls):
cls._sample_image = Image.from_attributes(cls.SAMPLE_IMAGE_SIZE.width, cls.SAMPLE_IMAGE_SIZE.height, ColorMode.BGR)
@mock.patch('services.video_streaming.stream_readers.CameraStreamReader.VideoCapture', autospec = False)
def setup(self, video_capture_mock):
self._video_capture_mock_instance = video_capture_mock.return_value
self._video_capture_mock_instance.open_camera.return_value = True
self._camera_stream_reader = CameraStreamReader(self.SAMPLE_CAMERA_ID)
@raises(InvalidOperationError)
def test_given_camera_not_opened_when_reading_next_frame_then_error_is_raised(self):
self._camera_stream_reader.close()
self._camera_stream_reader.read_next()
@raises(IOError)
def test_given_unsuccessful_video_capture_read_when_reading_next_frame_then_error_is_raised(self):
self._video_capture_mock_instance.read.return_value = False, None
self._camera_stream_reader.read_next()
def test_given_successful_video_capture_read_when_reading_next_frame_then_image_is_returned(self):
self._video_capture_mock_instance.read.return_value = True, self._sample_image.cv_image
image = self._camera_stream_reader.read_next()
assert_is(image.cv_image, self._sample_image.cv_image)
def test_given_opened_camera_when_camera_stream_reader_is_closed_then_video_capture_is_released(self):
self._camera_stream_reader.close()
self._video_capture_mock_instance.release.assert_called_with()
def setup(self, video_capture_mock):
self._video_capture_mock_instance = video_capture_mock.return_value
self._video_capture_mock_instance.open_camera.return_value = True
self._camera_stream_reader = CameraStreamReader(self.SAMPLE_CAMERA_ID)
def set_camera_source(self, camera_id, frame_rotation_angle = 0):
camera_stream_reader = CameraStreamReader(camera_id)
camera_stream_reader.frame_size = self.TARGET_CAMERA_FRAME_SIZE
camera_stream_reader.frame_rotation_angle = frame_rotation_angle
self._change_source(camera_stream_reader)