code: def test_selector_all(df: pl.DataFrame) -> None:
      assert df.schema == df.select(cs.all()).schema
      assert {} == df.select(~cs.all()).schema
      assert df.schema == df.select(~(~cs.all())).schema
      assert df.select(cs.all() & pl.col("abc")).schema == {
          "abc": pl.UInt16
      }
  
imports: from typing import Any
  import pytest
  import polars
  import polars.selectors
  from polars.selectors import expand_selector, is_selector
  from polars.testing import assert_frame_equal
label_desc: Use image node_id 3 for calling a global function with example usage: test_selector_all(df) without return types