code: def test_compare_aliases(self, env, op, expect):
      t = env.from_string(f"{{{{ 2 is {op} }}}}")
      assert t.render() == str(expect)
  
imports: import pytest
  from markupsafe import Markup
  from jinja2 import Environment
  from jinja2 import TemplateAssertionError
  from jinja2 import TemplateRuntimeError
label_desc: Use image node_id 8 for calling the TestTestsCase obj's underlying member method code with example usage: obj.test_compare_aliases(env, op, expect) without return types