Proper mock_obj passing

import csmapi

from knoten import csm

@pytest.fixture

def mock_dem():

    mock_dem = mock.MagicMock(spec_set=GeoDataset)

    mock_dem.no_data_value = 10

    mock_dem.read_array.return_value = [[100]]

    mock_dem.latlon_to_pixel.return_value = (0.5,0.5)

    return mock_dem

@pytest.fixture

def mock_sensor():

    mock_sensor = mock.MagicMock(spec=csmapi.RasterGM)

    mock_sensor.imageToGround.assert_called_once_with(pt, height)

@mock.patch.object(csm, 'get_radii', return_value=(10,10))

@mock.patch('pyproj.transformer.Transformer.transform', return_value=(0,0,0))

@mock.patch.object(csm, '_compute_intersection_distance', return_value=0)

def test_generate_ground_point_with_dtm(mock_sensor, pt, _):

    # Passing the mock_dem fixture fails for some reason. The

    # isinstance(obj, GeoDataset) check fails, causing the singldispath

    # to never dispatch to the func under test.

    mock_dem = mock.MagicMock(spec_set=GeoDataset)

    mock_dem.no_data_value = 10

    mock_dem.read_array.return_value = [[100]]

    mock_dem.latlon_to_pixel.return_value = (0.5,0.5)

@mock.patch('pyproj.transformer.Transformer.transform', return_value=(0,0,0))

def test_generate_ground_point_with_dtm(mock_get_radii, 

                                        mock_compute_intsesection, 

                                        mock_pyproj_transformer, 

                                        mock_sensor, pt, mock_dem):

    csm.generate_ground_point(mock_dem, pt, mock_sensor)

    # This call is mocked so that the intitial intersection and 

    # one iteration should occur. Therefore, the call count

@mock.patch.object(csm, 'get_radii', return_value=(10,10))

@mock.patch('pyproj.transformer.Transformer.transform', return_value=(0,0,0))

def test_generate_ground_point_with_dtm_ndv(mock_sensor, pt):

    # Passing the mock_dem fixture fails for some reason. The

    # isinstance(obj, GeoDataset) check fails, causing the singldispath

    # to never dispatch to the func under test.

    mock_dem = mock.MagicMock(spec_set=GeoDataset)

    # If the no data value equals the height, this should raise a value error

def test_generate_ground_point_with_dtm_ndv(mock_get_radii,

                                            mock_pyproj_transformer,

                                            mock_sensor, pt, mock_dem):

    mock_dem.no_data_value = 100

    mock_dem.read_array.return_value = [[100]]

    mock_dem.latlon_to_pixel.return_value = (0.5,0.5)

    with pytest.raises(ValueError):

        csm.generate_ground_point(mock_dem, pt, mock_sensor)