class_docstr: Test that wire labels work correctly.
docstr: Test wire_order constains unused wires, show_all_wires
  forces them to display.
docstr_tok: ["Test","wire_order","constains","unused","wires",",","show_all_wires","forces","them","to","display","."]
code: def test_show_all_wires(self):
      """Test wire_order constains unused wires, show_all_wires
      forces them to display."""
  
      split_str = tape_text(
          tape, wire_order=["b"], show_all_wires=True
      ).split("\n")
  
      assert split_str[0][:6] == "    b:"
      assert split_str[1][:6] == "    0:"
      assert split_str[2][:6] == "    a:"
      assert split_str[3][:6] == "1.234:"
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.drawer import tape_text
  from pennylane.drawer.tape_text import _add_grouping_symbols, _add_cond_grouping_symbols, _add_mid_measure_grouping_symbols, _add_cwire_measurement_grouping_symbols, _add_cwire_measurement, _add_measurement, _add_op, _Config
  from pennylane.tape import QuantumScript, QuantumTape
label_desc: Use image node_id 3 for calling the TestLabeling obj's underlying member method code with example usage: obj.test_show_all_wires() without return types