class_docstr: Unit tests for clifford compilation function.
class_docstr_tok: ["Unit","tests","for","clifford","compilation","function","."]
docstr: Test decomposition for the Clifford transform.
docstr_tok: ["Test","decomposition","for","the","Clifford","transform","."]
code: def test_qnode_decomposition(self):
      """Test decomposition for the Clifford transform."""
  
      dev = qml.device("default.qubit")
  
      def qfunc():
          qml.PhaseShift(1.0, wires=[0])
          qml.PhaseShift(2.0, wires=[1])
          qml.ISWAP(wires=[0, 1])
          return qml.expval(qml.PauliZ(0))
  
      original_qnode = qml.QNode(qfunc, dev)
      transfmd_qnode = qml.QNode(
          clifford_t_decomposition(qfunc, max_depth=3, basis_length=10),
          dev,
      )
  
      res1, res2 = original_qnode(), transfmd_qnode()
      assert qml.math.isclose(res1, res2, atol=1e-2)
  
      assert all(
          isinstance(op, _CLIFFORD_PHASE_GATES)
          or isinstance(
              getattr(op, "base", None), _CLIFFORD_PHASE_GATES
          )
          for op in transfmd_qnode.tape.operations
      )
  
imports: import math
  from functools import reduce
  import pytest
  import pennylane
  from pennylane.transforms.decompositions.clifford_t_transform import check_clifford_t, clifford_t_decomposition, _rot_decompose, _one_qubit_decompose, _two_qubit_decompose, _CLIFFORD_T_GATES
  from pennylane.transforms.optimization.optimization_utils import _fuse_global_phases
label_desc: Use image node_id 3 for calling the TestCliffordCompile obj's underlying member method code with example usage: obj.test_qnode_decomposition() and returns: qml