code: def test_hashers(hasher):
      # Sanity check
      x = b"x"
      h = hasher(x)
      assert isinstance(h, bytes)
      assert 8 <= len(h) < 32
  
imports: from __future__ import annotations
  import pytest
  from dask.hashing import hash_buffer, hash_buffer_hex, hashers
label_desc: Use image node_id 3 for calling a global function with example usage: test_hashers(hasher) without return types