class_docstr: Test the TrotterProduct class initializes correctly.
class_docstr_tok: ["Test","the","TrotterProduct","class","initializes","correctly","."]
docstr: Test that an error is raised if 'order' is not one or positive even number.
docstr_tok: ["Test","that","an","error","is","raised","if","'order","'","is","not","one","or","positive","even","number","."]
code: def test_error_order(self, order):
      """Test that an error is raised if 'order' is not one or positive even number."""
      time = 0.5
      hamiltonian = qml.dot(
          [1.23, 3.45], [qml.PauliX(0), qml.PauliZ(1)]
      )
  
      with pytest.raises(
          ValueError,
          match="The order of a TrotterProduct must be 1 or a positive even integer,",
      ):
          qml.TrotterProduct(hamiltonian, time, order=order)
  
imports: import copy
  from functools import reduce
  import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.math import allclose, get_interface
  from pennylane.templates.subroutines.trotter import _recursive_expression, _scalar
label_desc: Use image node_id 4 for calling the TestInitialization obj's underlying member method code with example usage: obj.test_error_order(order) without return types