old_contents: 
  # (c) 2018 Adrian Likins <alikins@redhat.com>
  # Copyright (c) 2018 Ansible Project
  # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
  #  or
  # Apache License v2.0 (see http://www.apache.org/licenses/LICENSE-2.0)
  #
  # Dual licensed so any test cases could potentially be included by the upstream project
  # that module_utils/distro.py is from (https://github.com/nir0s/distro)
  
  
  # Note that nir0s/distro has many more tests in it's test suite. The tests here are
  # primarily for testing the vendoring.
  
  import platform
  import pytest
  import sys
  
  from ansible.module_utils import distro
  from ansible.module_utils.common.sys_info import (get_distribution, get_distribution_version,
                                                    get_distribution_codename)
  
  
  # Generic test case with minimal assertions about specific returned values.
  class TestDistro():
      # should run on any platform without errors, even if non-linux without any
      # useful info to return
      def test_info(self):
          info = distro.info()
          assert isinstance(info, dict), \
              'distro.info() returned %s (%s) which is not a dist' % (info, type(info))
  
      def test_linux_distribution(self):
          linux_dist = distro.linux_distribution()
          assert isinstance(linux_dist, tuple), \
              'linux_distrution() returned %s (%s) which is not a tuple' % (linux_dist, type(linux_dist))
  
  
  # compare distro.py results with platform.linux_distribution() if we have it
  # Depending on the platform, it is okay if these don't match exactly as long as the
  # distro result is what we expect and special cased.
  class TestDistroCompat():
      '''Verify that distro.linux_distribution matches plain platform.linux_distribution'''
      @pytest.mark.skipif(sys.version_info >= (3, 8), reason="Python 3.8 and later do not have platform.linux_distribution().")
      def test_linux_distribution(self):
          distro_linux_dist = (get_distribution(), get_distribution_version(), get_distribution_codename())
  
          platform_linux_dist = platform.linux_distribution()
  
          assert isinstance(distro_linux_dist, type(platform_linux_dist)), \
              'linux_distribution() returned type (%s) which is different from platform.linux_distribution type (%s)' % \
              (type(distro_linux_dist), type(platform_linux_dist))
  
          # TODO: add the cases where we expect them to differ
  
          # The third item in the tuple is different.
          assert distro_linux_dist[0] == platform_linux_dist[0]
          assert distro_linux_dist[1] == platform_linux_dist[1]
  
          if platform_linux_dist[0] == 'Fedora' and 20 < int(platform_linux_dist[1]) < 28:
              pytest.skip("Fedora versions between 20 and 28 return the variant instead of the code name making this test unreliable")
              # Fedora considers the platform_linux behaviour to have been a bug as it's finding the
              # variant, not the code name.  Fedora wants this to be the empty string.
              platform_linux_dist = platform_linux_dist[:2] + ('',)
          assert distro_linux_dist[2] == platform_linux_dist[2]
  
new_contents: 
  # (c) 2018 Adrian Likins <alikins@redhat.com>
  # Copyright (c) 2018 Ansible Project
  # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
  #  or
  # Apache License v2.0 (see http://www.apache.org/licenses/LICENSE-2.0)
  #
  # Dual licensed so any test cases could potentially be included by the upstream project
  # that module_utils/distro.py is from (https://github.com/nir0s/distro)
  
  
  # Note that nir0s/distro has many more tests in it's test suite. The tests here are
  # primarily for testing the vendoring.
  
  from ansible.module_utils import distro
  from ansible.module_utils.six import string_types
  
  
  # Generic test case with minimal assertions about specific returned values.
  class TestDistro():
      # should run on any platform without errors, even if non-linux without any
      # useful info to return
      def test_info(self):
          info = distro.info()
          assert isinstance(info, dict), \
              'distro.info() returned %s (%s) which is not a dist' % (info, type(info))
  
      def test_linux_distribution(self):
          linux_dist = distro.linux_distribution()
          assert isinstance(linux_dist, tuple), \
              'linux_distrution() returned %s (%s) which is not a tuple' % (linux_dist, type(linux_dist))
  
      def test_id(self):
          id = distro.id()
          assert isinstance(id, string_types), 'distro.id() returned %s (%s) which is not a string' % (id, type(id))
  
subject: Update distro unit test (#55003)