code: def test_spontaneous_env():
      t = NativeTemplate("{{ true }}")
      assert isinstance(t.environment, NativeEnvironment)
  
imports: import pytest
  from jinja2._compat import text_type
  from jinja2.exceptions import UndefinedError
  from jinja2.nativetypes import NativeEnvironment
  from jinja2.nativetypes import NativeTemplate
  from jinja2.runtime import Undefined
label_desc: Use image node_id 20 for calling a global function with example usage: test_spontaneous_env() without return types