class_docstr: Tests that the template defines the correct sign flip.
class_docstr_tok: ["Tests","that","the","template","defines","the","correct","sign","flip","."]
docstr: Assert error raised when given empty wires
docstr_tok: ["Assert","error","raised","when","given","empty","wires"]
code: def test_wire_empty_error(self, n_status, n_wires):
      """Assert error raised when given empty wires"""
      with pytest.raises(
          ValueError,
          match="expected at least one wire representing the qubit ",
      ):
          qml.FlipSign(n_status, wires=n_wires)
  
file_path: pennylane/tests/templates/test_subroutines/test_flip_sign.py
imports: import pytest
  from pennylane import numpy
  import pennylane
label_desc: Use image node_id 5 for calling the TestFlipSign obj's underlying member method code with example usage: obj.test_wire_empty_error(n_status, n_wires) without return types