code: def test_reshape_hidden_states(self):
      # Create a tensor of shape (1,2,3,1)
      t = (
          torch.stack([torch.ones(3), torch.zeros(3)])
          .unsqueeze(0)
          .unsqueeze(-1)
      )
      result = activations.reshape_hidden_states_to_3d(t)
      assert result.shape == (1, 6, 1)
  
imports: import pytest
  import torch
  import numpy
  from ecco import activations
label_desc: Use image node_id 1 for calling the TestActivations obj's underlying member method code with example usage: obj.test_reshape_hidden_states() without return types