code: def test_valid_cases(self):
      for args in self.valid:
          # Just testing that no exception is raised
          tools.validate_matrix_shape(*args)
  
imports: import pytest
  import numpy
  from numpy.testing import assert_allclose, assert_equal, assert_array_less, assert_array_equal, assert_almost_equal
  import pandas
  from scipy.linalg import solve_discrete_lyapunov
  from statsmodels.tsa.statespace import tools
  from statsmodels.tsa.stattools import acovf
label_desc: Use image node_id 1 for calling the TestValidateMatrixShape obj's underlying member method code with example usage: obj.test_valid_cases() without return types