code: def test_matrix(self, device, dtype, batch_size):
      q1 = Quaternion.random(batch_size, device, dtype)
      m1 = q1.matrix()
      q2 = Quaternion.from_matrix(m1)
      for qq1, qq2 in zip(q1.data, q2.data):
          try:
              self.assert_close(qq1, qq2)
          except Exception:
              self.assert_close(qq1, -qq2)
  
imports: import pytest
  import torch
  from kornia.geometry.quaternion import Quaternion
  from kornia.testing import assert_close
label_desc: Use image node_id 19 for calling the TestQuaternion obj's underlying member method code with example usage: obj.test_matrix(device, dtype, batch_size) without return types