code: def test_matrix(self):
      self.check_matrix(vals=(100 * get_mat(5) + 1).astype("l"))
  
imports: import functools
  from unittest import expectedFailure, skipIf
  import pytest
  from pytest import raises
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
label_desc: Use image node_id 2 for calling the TestDiag obj's underlying member method code with example usage: obj.test_matrix() without return types