code: def test_is_test(env):
      assert env.call_test("test", "number")
      assert not env.call_test("test", "bad-name")
  
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 4 for calling a global function with example usage: test_is_test(env) without return types