def test_env_should_come_with_default_extensions() -> None:
    """Verify default extensions loaded with StrictEnvironment."""
    env = StrictEnvironment(keep_trailing_newline=True)
    assert 'cookiecutter.extensions.JsonifyExtension' in env.extensions
    assert 'cookiecutter.extensions.RandomStringExtension' in env.extensions
    assert 'cookiecutter.extensions.SlugifyExtension' in env.extensions
    assert 'cookiecutter.extensions.TimeExtension' in env.extensions
    assert 'cookiecutter.extensions.UUIDExtension' in env.extensions
Verify default extensions loaded with StrictEnvironment.
tests/test_environment.py