class_docstr: Tests the pauli_decompose function
docstr: Tests that an exception is raised if the Hamiltonian is not Hermitian, i.e.
  equal to its own conjugate transpose
docstr_tok: ["Tests","that","an","exception","is","raised","if","the","Hamiltonian","is","not","Hermitian",",","i.e",".","equal","to","its","own","conjugate","transpose"]
code: def test_not_hermitian(self):
      """Tests that an exception is raised if the Hamiltonian is not Hermitian, i.e.
      equal to its own conjugate transpose"""
      with pytest.raises(
          ValueError, match="The matrix is not Hermitian"
      ):
          qml.pauli_decompose(np.array([[1, 2], [3, 4]]))
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane.operation import Tensor
  from pennylane.ops import Identity, PauliX, PauliY, PauliZ
  from pennylane.pauli import pauli_sentence, PauliWord, PauliSentence
  from pennylane.pauli.conversion import _generalized_pauli_decompose
label_desc: Use image node_id 2 for calling the TestDecomposition obj's underlying member method code with example usage: obj.test_not_hermitian() without return types