code: def test_in(self, env):
      tmpl = env.from_string(
          '{{ "o" is in "foo" }}|'
          '{{ "foo" is in "foo" }}|'
          '{{ "b" is in "foo" }}|'
          "{{ 1 is in ((1, 2)) }}|"
          "{{ 3 is in ((1, 2)) }}|"
          "{{ 1 is in [1, 2] }}|"
          "{{ 3 is in [1, 2] }}|"
          '{{ "foo" is in {"foo": 1}}}|'
          '{{ "baz" is in {"bar": 1}}}'
      )
      assert (
          tmpl.render()
          == "True|True|False|True|False|True|False|True|False"
      )
  
imports: import pytest
  from jinja2 import Environment
  from jinja2 import Markup
label_desc: Use image node_id 15 for calling the TestTestsCase obj's underlying member method code with example usage: obj.test_in(env) without return types