text: from nose.tools import assert_equal, assert_greater
  
  from pdfminer.pdffont import PDFCIDFont
  from pdfminer.pdfinterp import PDFResourceManager
  from pdfminer.psparser import PSLiteral
  
  
  def test_get_cmap_from_pickle():
      """Test if cmap file is read from pdfminer/cmap
  
      Regression test for https://github.com/pdfminer/pdfminer.six/issues/391
      """
      cmap_name = 'UniGB-UCS2-H'
      spec = {'Encoding': PSLiteral(cmap_name)}
      resource_manager = PDFResourceManager()
      font = PDFCIDFont(resource_manager, spec)
  
      cmap = font.get_cmap_from_spec(spec, False)
  
      assert_equal(cmap.attrs.get('CMapName'), cmap_name)
      assert_greater(len(cmap.code2cid), 0)
  