code: def test_spin_param():
      """Test SpinParam object."""
      from deepchem.utils.dft_utils import SpinParam
  
      dens_u = torch.ones(1)
      dens_d = torch.zeros(1)
      sp = SpinParam(u=dens_u, d=dens_d)
  
      assert torch.allclose(sp.u, dens_u)
      assert torch.allclose(sp.d, dens_d)
      assert torch.allclose(sp.sum(), torch.tensor([1.0]))
      assert torch.allclose(
          sp.reduce(torch.multiply), torch.tensor([0.0])
      )
  
file_path: deepchem/deepchem/utils/test/test_dft_utils.py
imports: import pytest
  import numpy
  from typing import Union
label_desc: Use image node_id 6 for calling a global function with example usage: test_spin_param() without return types