class_docstr: tests for qml.ops._ctrl_decomp_bisect_od
docstr: Tests that the A matrix subroutine returns a correct A matrix.
docstr_tok: ["Tests","that","the","A","matrix","subroutine","returns","a","correct","A","matrix","."]
code: def test_a_matrix(self, op, tol):
      """Tests that the A matrix subroutine returns a correct A matrix."""
      su = op.matrix()
      sx = qml.PauliX.compute_matrix()
      a = _bisect_compute_a(su)
      at = _matrix_adjoint(a)
      assert np.allclose(
          at @ sx @ a @ sx @ at @ sx @ a @ sx, su, atol=tol, rtol=tol
      )
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane.ops import ctrl_decomp_zyz
  from pennylane.wires import Wires
  from pennylane.ops.op_math.controlled_decompositions import _ctrl_decomp_bisect_od, _ctrl_decomp_bisect_md, _ctrl_decomp_bisect_general, ctrl_decomp_bisect, _convert_to_su2, _bisect_compute_a, _bisect_compute_b
  from pennylane.ops.op_math.controlled import Controlled
  from pennylane import math
label_desc: Use image node_id 5 for calling the TestControlledBisectOD obj's underlying member method code with example usage: obj.test_a_matrix(op, tol) without return types