def METHOD_NAME(self):
    """Test if validate_geometries throws an error
    if the provided geojson contains a not defined feature."""
    path = (
        "fixtures/tile_map_service_grid/projects/projectDraft_feature_is_none.json"
    )
    project = create_project(path)
    # we expect that the function raises a CustomError due to the fact
    # that one feature of the geojson is None
    self.assertRaises(CustomError, project.validate_geometries)