class_docstr: Test codehilite extension. 
class_docstr_tok: ["Test","codehilite","extension","."]
code: def testDoesntCrashWithEmptyCodeTag(self):
      expected = "<h1>Hello</h1>\n<pre><code></code></pre>"
      self.assertMarkdownRenders(
          "# Hello",
          expected,
          extensions=[
              CodeHiliteExtension(),
              _ExtensionThatAddsAnEmptyCodeTag(),
          ],
      )
  
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 20 for calling the TestCodeHiliteExtension obj's underlying member method code with example usage: obj.testDoesntCrashWithEmptyCodeTag() without return types