code: def test_recalculate_single_worm_control_points_no_objects():
      # regression test of issue #930
      (
          result,
          lengths,
      ) = cellprofiler.modules.untangleworms.recalculate_single_worm_control_points(
          [numpy.zeros((10, 15), int)], 3
      )
      assert tuple(result.shape) == (0, 3, 2)
      assert len(lengths) == 0
  
imports: import base64
  import io
  import os
  import tempfile
  import zlib
  import imageio
  import centrosome.outline
  import numpy
  import scipy.ndimage
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  import cellprofiler_core.modules
  import cellprofiler.modules.untangleworms
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.preferences
  import cellprofiler_core.setting
  import cellprofiler_core.workspace
  import tests.frontend.modules
label_desc: Use image node_id 43 for calling a global function with example usage: test_recalculate_single_worm_control_points_no_objects() without return types