class_docstr: Test that the text for empty tapes is correct.
docstr: Test using an empty tape returns a blank string
docstr_tok: ["Test","using","an","empty","tape","returns","a","blank","string"]
code: def test_empty_tape(self):
      """Test using an empty tape returns a blank string"""
      assert tape_text(QuantumScript()) == ""
  
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 1 for calling the TestEmptyTapes obj's underlying member method code with example usage: obj.test_empty_tape() without return types