class_docstr: Tests Von Neumann entropy transform
docstr: Test entropy for a QNode numpy.
docstr_tok: ["Test","entropy","for","a","QNode","numpy","."]
code: def test_IsingXX_qnode_entropy(self, param, wires, device, base):
      """Test entropy for a QNode numpy."""
  
      dev = qml.device(device, wires=2)
  
      @qml.qnode(dev)
      def circuit_state(x):
          qml.IsingXX(x, wires=[0, 1])
          return qml.state()
  
      entropy = qml.qinfo.vn_entropy(
          circuit_state, wires=wires, base=base
      )(param)
  
      expected_entropy = expected_entropy_ising_xx(param) / np.log(base)
      assert qml.math.allclose(entropy, expected_entropy)
  
imports: import pytest
  import pennylane
  from pennylane import numpy
label_desc: Use image node_id 2 for calling the TestVonNeumannEntropy obj's underlying member method code with example usage: obj.test_IsingXX_qnode_entropy(param, wires, device, base) and returns: qml