class_docstr: Test inputs and pre-processing.
class_docstr_tok: ["Test","inputs","and","pre-processing","."]
docstr: Tests if the correct error is thrown when hamiltonian is not a pennylane.Hamiltonian object
docstr_tok: ["Tests","if","the","correct","error","is","thrown","when","hamiltonian","is","not","a","pennylane.Hamiltonian","object"]
code: def test_hamiltonian_error(self):
      """Tests if the correct error is thrown when hamiltonian is not a pennylane.Hamiltonian object"""
  
      n_wires = 2
      dev = qml.device("default.qubit", wires=n_wires)
  
      hamiltonian = np.array([[1, 1], [1, 1]])
  
      @qml.qnode(dev)
      def circuit():
          qml.ApproxTimeEvolution(hamiltonian, 2, 3)
          return [
              qml.expval(qml.PauliZ(wires=i)) for i in range(n_wires)
          ]
  
      with pytest.raises(
          ValueError,
          match="hamiltonian must be of type pennylane.Hamiltonian",
      ):
          circuit()
  
imports: import pytest
  import numpy
  from pennylane import numpy
  import pennylane
label_desc: Use image node_id 1 for calling the TestInputs obj's underlying member method code with example usage: obj.test_hamiltonian_error() and returns: unknown