class_docstr: Tests ``_default_wire_map`` helper function.
class_docstr_tok: ["Tests","``","_default_wire_map","``","helper","function","."]
docstr: Test creating an empty wire map
docstr_tok: ["Test","creating","an","empty","wire","map"]
code: def test_empty(self):
      """Test creating an empty wire map"""
  
      wire_map = default_wire_map([])
      assert wire_map == {}
  
imports: import pytest
  import pennylane
  from pennylane.drawer.utils import default_wire_map, default_bit_map, convert_wire_order, unwrap_controls, cwire_connections
  from pennylane.wires import Wires
label_desc: Use image node_id 1 for calling the TestDefaultWireMap obj's underlying member method code with example usage: obj.test_empty() without return types