docstr: Tests that the decomposition of the CY gate is correct
docstr_tok: ["Tests","that","the","decomposition","of","the","CY","gate","is","correct"]
code: def test_CY_decomposition(self, tol):
      """Tests that the decomposition of the CY gate is correct"""
      op = qml.CY(wires=[0, 1])
      gate1, gate2 = op.decomposition()
      decomposed_matrix = qml.matrix(op.decomposition)()
  
      assert qml.equal(gate1, qml.CRY(np.pi, wires=[0, 1]))
      assert qml.equal(gate2, qml.S(0))
      assert np.allclose(
          decomposed_matrix, op.matrix(), atol=tol, rtol=0
      )
  
imports: import copy
  import numpy
  import pytest
  from scipy.linalg import fractional_matrix_power
  from scipy.sparse import csr_matrix
  from scipy.stats import unitary_group
  from gate_data import CY, CZ
  import pennylane
  from pennylane.wires import Wires
  from pennylane.operation import AnyWires
  from pennylane.ops.qubit.matrix_ops import QubitUnitary
label_desc: Use image node_id 1 for calling the TestDecompositions obj's underlying member method code with example usage: obj.test_CY_decomposition(tol) without return types