code: def test_spin():
      assert operators_to_state({J2Op, JxOp}) == JxKet
      assert operators_to_state({J2Op, JyOp}) == JyKet
      assert operators_to_state({J2Op, JzOp}) == JzKet
      assert operators_to_state({J2Op(), JxOp()}) == JxKet
      assert operators_to_state({J2Op(), JyOp()}) == JyKet
      assert operators_to_state({J2Op(), JzOp()}) == JzKet
  
      assert state_to_operators(JxKet) == {J2Op, JxOp}
      assert state_to_operators(JyKet) == {J2Op, JyOp}
      assert state_to_operators(JzKet) == {J2Op, JzOp}
      assert state_to_operators(JxBra) == {J2Op, JxOp}
      assert state_to_operators(JyBra) == {J2Op, JyOp}
      assert state_to_operators(JzBra) == {J2Op, JzOp}
  
      assert state_to_operators(JxKet(S.Half, S.Half)) == {
          J2Op(),
          JxOp(),
      }
      assert state_to_operators(JyKet(S.Half, S.Half)) == {
          J2Op(),
          JyOp(),
      }
      assert state_to_operators(JzKet(S.Half, S.Half)) == {
          J2Op(),
          JzOp(),
      }
      assert state_to_operators(JxBra(S.Half, S.Half)) == {
          J2Op(),
          JxOp(),
      }
      assert state_to_operators(JyBra(S.Half, S.Half)) == {
          J2Op(),
          JyOp(),
      }
      assert state_to_operators(JzBra(S.Half, S.Half)) == {
          J2Op(),
          JzOp(),
      }
  
file_path: sympy/sympy/physics/quantum/tests/test_operatorset.py
imports: from sympy.core.singleton import S
  from sympy.physics.quantum.operatorset import operators_to_state, state_to_operators
  from sympy.physics.quantum.cartesian import XOp, XKet, PxOp, PxKet, XBra, PxBra
  from sympy.physics.quantum.state import Ket, Bra
  from sympy.physics.quantum.operator import Operator
  from sympy.physics.quantum.spin import JxKet, JyKet, JzKet, JxBra, JyBra, JzBra, JxOp, JyOp, JzOp, J2Op
  from sympy.testing.pytest import raises
label_desc: Use image node_id 1 for calling a global function with example usage: test_spin() without return types