text: from unittest import TestCase
  
  from espresso.references import load_references
  from espresso.workflows import WORKFLOW_FILES
  
  
  class TestLoadReferences(TestCase):
  
      def test_load_references(self):
          for workflow in WORKFLOW_FILES.keys():
              for version in ('b37', 'hg38'):
                  self.assertIs(type(load_references(workflow, version)), list)
  