text: from django.test import TestCase
  
  
  PAPERMERGE_PIPELINES = [
      'papermerge.test.test_import_pipelines.PipelineOne',
      'papermerge.test.test_import_pipelines.PipelineTwo',
      'papermerge.test.test_import_pipelines.PipelineThree',
  ]
  
  
  class TestImportPipelines(TestCase):
      pass
  
  
  class PipelineOne:
  
      def get_init_kwargs(self):
          if self.doc:
              return {'doc': self.doc}
          return None
  
      def get_apply_kwargs(self):
          if self.doc:
              return {'doc': self.doc}
          return None
  
      def apply(self):
          pass
  
  
  class PipelineTwo:
      pass
  
  
  class PipelineThree:
      pass
  