class_docstr: Test codehilite extension. 
class_docstr_tok: ["Test","codehilite","extension","."]
code: def testUnknownOption(self):
      if has_pygments:
          # Odd result as no `lang` given and a single comment is not enough for guessing.
          expected = (
              '<div class="codehilite"><pre><span></span><code><span class="err"># A Code Comment</span>\n'
              "</code></pre></div>"
          )
      else:
          expected = (
              '<pre class="codehilite"><code># A Code Comment\n'
              "</code></pre>"
          )
      self.assertMarkdownRenders(
          "\t# A Code Comment",
          expected,
          extensions=[CodeHiliteExtension(unknown="some value")],
      )
  
imports: from markdown.test_tools import TestCase
  from markdown.extensions.codehilite import CodeHiliteExtension, CodeHilite
  from markdown import extensions, treeprocessors
  import os
  import xml.etree.ElementTree
label_desc: Use image node_id 15 for calling the TestCodeHiliteExtension obj's underlying member method code with example usage: obj.testUnknownOption() without return types