code: def test_package_loader(self, package_loader):
      env = Environment(loader=package_loader)
      tmpl = env.get_template("test.html")
      assert tmpl.render().strip() == "BAR"
      pytest.raises(TemplateNotFound, env.get_template, "missing.html")
  
imports: import os
  import shutil
  import sys
  import tempfile
  import time
  import weakref
  import pytest
  from jinja2 import Environment
  from jinja2 import loaders
  from jinja2._compat import PY2
  from jinja2._compat import PYPY
  from jinja2.exceptions import TemplateNotFound
  from jinja2.loaders import split_template_path
  import yatest.common
label_desc: Use image node_id 2 for calling the TestLoaders obj's underlying member method code with example usage: obj.test_package_loader(package_loader) without return types