text: import os
  
  from astropy.tests.helper import assert_quantity_allclose
  
  from specutils import Spectrum1D
  
  
  def test_create_filters(specviz_gui):
  
      workspace = specviz_gui.add_workspace()
      filters, loader_name_map = workspace._create_loader_filters()
  
      # Simple sanity test to make sure regression was removed
      assert filters[0] == 'Auto (*)'
      assert loader_name_map['Auto (*)'] is None
  
  
  def test_export_data(specviz_gui, tmpdir):
  
      fname = str(tmpdir.join('export.ecsv'))
  
      workspace = specviz_gui._workspaces[0]
      data_item = workspace.current_item
      workspace.export_data_item(data_item, fname, '*.ecsv')
  
      assert os.path.isfile(fname)
  
      exported = Spectrum1D.read(fname, format='ECSV')
      original = data_item.data_item.spectrum
  
      assert_quantity_allclose(exported.flux, original.flux)
      assert_quantity_allclose(exported.spectral_axis, original.spectral_axis)
      if original.uncertainty is None:
          assert exported.uncertainty is None
      else:
          assert_quantity_allclose(exported.uncertainty, original.uncertainty)
  