code: def test_unify_zero():
      labels, workspace = rruunn(
          numpy.zeros((10, 20), int),
          cellprofiler.modules.splitormergeobjects.OPTION_MERGE,
      )
      assert numpy.all(labels == 0)
      assert labels.shape[0] == 10
      assert labels.shape[1] == 20
  
imports: import numpy
  import six.moves
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  import cellprofiler_core.measurement
  from cellprofiler_core.constants.measurement import M_LOCATION_CENTER_X, M_LOCATION_CENTER_Y, FF_COUNT, FF_PARENT, COLTYPE_FLOAT, M_NUMBER_OBJECT_NUMBER, COLTYPE_INTEGER, FF_CHILDREN_COUNT
  import cellprofiler.modules.splitormergeobjects
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.workspace
  import tests.frontend.modules
label_desc: Use image node_id 7 for calling a global function with example usage: test_unify_zero() without return types