code: def test_grover():
      nqubits = 2
      assert apply_grover(return_one_on_one, nqubits) == IntQubit(
          1, nqubits=nqubits
      )
  
      nqubits = 4
      basis_states = superposition_basis(nqubits)
      expected = (-13 * basis_states) / 64 + 264 * IntQubit(
          2, nqubits
      ) / 256
      assert apply_grover(return_one_on_two, 4) == qapply(expected)
  
file_path: sympy/sympy/physics/quantum/tests/test_grover.py
imports: from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.matrices.dense import Matrix
  from sympy.physics.quantum.represent import represent
  from sympy.physics.quantum.qapply import qapply
  from sympy.physics.quantum.qubit import IntQubit
  from sympy.physics.quantum.grover import apply_grover, superposition_basis, OracleGate, grover_iteration, WGate
label_desc: Use image node_id 8 for calling a global function with example usage: test_grover() without return types