code: def test_invalid_email_address_local_part(self):
      self.assertMarkdownRenders(
          "Missing local-part <@domain>",
          "<p>Missing local-part &lt;@domain&gt;</p>",
      )
  
file_path: markdown/tests/test_syntax/inline/test_autolinks.py
imports: from markdown.test_tools import TestCase
label_desc: Use image node_id 4 for calling the TestAutomaticLinks obj's underlying member method code with example usage: obj.test_invalid_email_address_local_part() without return types