class_docstr: These tests do not consider the case of multiple time steps in one call.
class_docstr_tok: ["These","tests","do","not","consider","the","case","of","multiple","time","steps","in","one","call","."]
code: def test_theta_monotonicity(self):
      pairs = sorted(_theta.items())
      for (m_a, theta_a), (m_b, theta_b) in zip(pairs[:-1], pairs[1:]):
          assert_(theta_a < theta_b)
  
imports: import numpy
  from numpy.testing import assert_allclose, assert_, assert_equal, suppress_warnings
  from scipy.sparse import SparseEfficiencyWarning
  import scipy.linalg
  from scipy.sparse.linalg._expm_multiply import _theta, _compute_p_max, _onenormest_matrix_power, expm_multiply, _expm_multiply_simple, _expm_multiply_interval
label_desc: Use image node_id 1 for calling the TestExpmActionSimple obj's underlying member method code with example usage: obj.test_theta_monotonicity() without return types