text: import pytest
  
  from . import contexts
  
  
  @pytest.yield_fixture
  def user_override(monkeypatch):
      """
      Override site.USER_BASE and site.USER_SITE with temporary directories in
      a context.
      """
      with contexts.tempdir() as user_base:
          monkeypatch.setattr('site.USER_BASE', user_base)
          with contexts.tempdir() as user_site:
              monkeypatch.setattr('site.USER_SITE', user_site)
              with contexts.save_user_site_setting():
                  yield
  
  
  @pytest.yield_fixture
  def tmpdir_cwd(tmpdir):
      with tmpdir.as_cwd() as orig:
          yield orig
  