new_contents: """
  SkCode electronic tag test code.
  """
  
  import unittest
  
  from skcode import (parse_skcode,
                      render_to_html,
                      render_to_text,
                      render_to_skcode)
  from skcode.tags import (NotNotationTagOptions,
                           DEFAULT_RECOGNIZED_TAGS)
  
  
  class NotNotationTagtestCase(unittest.TestCase):
      """ Tests suite for the NOT notation tag module. """
  
      def test_tag_and_aliases_in_default_recognized_tags_dict(self):
          """ Test the presence of the tag and aliases in the dictionary of default recognized tags. """
          self.assertIn('not', DEFAULT_RECOGNIZED_TAGS)
          self.assertIsInstance(DEFAULT_RECOGNIZED_TAGS['not'], NotNotationTagOptions)
  
      def test_tag_constant_values(self):
          """ Test tag constants. """
          opts = NotNotationTagOptions()
          self.assertFalse(opts.newline_closes)
          self.assertFalse(opts.same_tag_closes)
          self.assertFalse(opts.standalone)
          self.assertTrue(opts.parse_embedded)
          self.assertFalse(opts.swallow_trailing_newline)
          self.assertTrue(opts.inline)
          self.assertFalse(opts.close_inlines)
          self.assertFalse(opts.make_paragraphs_here)
  
      def test_html_rendering(self):
          """ Test HTML rendering. """
          document_tree = parse_skcode('Pull the [not]RESET[/not] pin low to reset.')
          rendered_output = render_to_html(document_tree)
          expected_output = 'Pull the <span style="text-decoration:overline; text-transform: uppercase;">RESET</span> pin low to reset.'
          self.assertEqual(expected_output, rendered_output)
  
      def test_text_rendering(self):
          """ Test text rendering. """
          document_tree = parse_skcode('Pull the [not]RESET[/not] pin low to reset.')
          rendered_output = render_to_text(document_tree)
          expected_output = 'Pull the /RESET pin low to reset.'
          self.assertEqual(expected_output, rendered_output)
  
      def test_text_rendering_auto_upper(self):
          """ Test text rendering. """
          document_tree = parse_skcode('Pull the [not]reset[/not] pin low to reset.')
          rendered_output = render_to_text(document_tree)
          expected_output = 'Pull the /RESET pin low to reset.'
          self.assertEqual(expected_output, rendered_output)
  
      def test_skcode_rendering(self):
          """ Test SkCode rendering. """
          document_tree = parse_skcode('Pull the [not]RESET[/not] pin low to reset.')
          rendered_output = render_to_skcode(document_tree)
          expected_output = 'Pull the [not]RESET[/not] pin low to reset.'
          self.assertEqual(expected_output, rendered_output)
  
subject: Add tests suite for electronic NOT tag.