code: def test_mutInversion_size_one_chromosome_returns_unchanged_chromosome_in_tuple(
      self,
  ):
      chromosome = ["a"]
      expected = ["a"]
      self.assertEqual((expected,), mutInversion(chromosome))
  
file_path: deap/tests/test_mutation.py
imports: import unittest
  from unittest import mock
  from deap.tools.mutation import mutInversion
label_desc: Use image node_id 2 for calling the MutationTest obj's underlying member method code with example usage: obj.test_mutInversion_size_one_chromosome_returns_unchanged_chromosome_in_tuple() without return types