code: def test_get_measurement_columns_nogroups():
      #
      # Don't return the metadata grouping tags measurement if no groups
      #
      groups = cellprofiler_core.modules.groups.Groups()
      groups.wants_groups.value = False
      columns = groups.get_measurement_columns(None)
      assert len(columns) == 0
  
file_path: CellProfiler/tests/core/modules/test_groups.py
imports: import io
  import os
  import numpy
  import cellprofiler_core.constants.measurement
  import cellprofiler_core.measurement
  import cellprofiler_core.modules.groups
  import cellprofiler_core.pipeline
  import cellprofiler_core.workspace
  import tests.core
label_desc: Use image node_id 8 for calling a global function with example usage: test_get_measurement_columns_nogroups() without return types