class_docstr: Test Evolution(Exp) class that takes a parameter x and a generator G and defines an evolution exp(ixG)
docstr: Tests that an error is raised if the generator is not hermitian.
docstr_tok: ["Tests","that","an","error","is","raised","if","the","generator","is","not","hermitian","."]
code: def test_generator_error_if_not_hermitian(self):
      """Tests that an error is raised if the generator is not hermitian."""
      op = Evolution(qml.RX(np.pi / 3, 0), 1)
  
      with pytest.raises(
          qml.QuantumFunctionError,
          match="of operation Evolution is not hermitian",
      ):
          qml.generator(op)
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.ops.op_math import Evolution, Exp
label_desc: Use image node_id 18 for calling the TestEvolution obj's underlying member method code with example usage: obj.test_generator_error_if_not_hermitian() without return types