old_contents: from pytest import fixture
  import testinfra.utils.ansible_runner
  
  
  testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
      '.molecule/ansible_inventory').get_hosts('all')
  
  
  # Adapted from
  # http://www.axelspringerideas.de/blog/index.php/2016/08/16/continuously-delivering-infrastructure-part-1-ansible-molecule-and-testinfra/
  @fixture()
  def Repository_exists(Command):
      """
      Tests if YUM Repo with specific Name exists and is enabled:
      - **repo** - repo name to look for
      **returns** - True if String is found
      """
      def f(repo):
          return (repo in Command.check_output("yum repolist"))
      return f
  
  
  def test_influxdb_repo_is_installed(Repository_exists):
      assert Repository_exists("Influxdb upstream yum repo")
  
  
  def test_infludb_repo_key_is_installed_(Command):
      # Adapted from https://wiki.centos.org/TipsAndTricks/YumAndRPM:
      # Show all installed GPG keys
      # Thanks to forum user babo for this one-liner to show all GPG keys along
      # with the corresponding repo information.
      rpm_keys = Command.check_output("rpm -q gpg-pubkey --qf '%{name}-%{version}-%{release} --> %{summary}\n'")
      assert "influxdb" in rpm_keys
  
  
  def test_influxdb_package_is_installed(Package):
      pkg = Package("influxdb")
      assert pkg.is_installed
  
  
  def test_influxdb_config_has_collectd_enabled(File):
      config = File("/etc/influxdb/influxdb.conf").content_string
      assert "[[collectd]]\n  enabled = true" in config
  
new_contents: from pytest import fixture
  import testinfra.utils.ansible_runner
  
  
  testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
      '.molecule/ansible_inventory').get_hosts('all')
  
  
  # Adapted from
  # http://www.axelspringerideas.de/blog/index.php/2016/08/16/continuously-delivering-infrastructure-part-1-ansible-molecule-and-testinfra/
  #
  # This is a little fancy for my taste. pytest fixtures are cool -- they're how
  # the testinfra File and Package helpers are implemented, so I think the author
  # was aiming for consistency -- but I'm not sure this one improves readability
  # or maintainability. However, 1) I didn't have to write it and 2) I thought it
  # might be instructive to show this approach. Contrast with the more direct
  # approach I use in test_influxdb_repo_key_is_installed().
  @fixture()
  def Repository_exists(Command):
      """
      Tests if YUM Repo with specific Name exists and is enabled:
      - **repo** - repo name to look for
      **returns** - True if String is found
      """
      def f(repo):
          return (repo in Command.check_output("yum repolist"))
      return f
  
  
  def test_influxdb_repo_is_installed(Repository_exists):
      assert Repository_exists("Influxdb upstream yum repo")
  
  
  def test_influxdb_repo_key_is_installed(Command):
      # Adapted from https://wiki.centos.org/TipsAndTricks/YumAndRPM:
      # Show all installed GPG keys
      # Thanks to forum user babo for this one-liner to show all GPG keys along
      # with the corresponding repo information.
      rpm_keys = Command.check_output("rpm -q gpg-pubkey --qf '%{name}-%{version}-%{release} --> %{summary}\n'")
      assert "influxdb" in rpm_keys
  
  
  def test_influxdb_package_is_installed(Package):
      pkg = Package("influxdb")
      assert pkg.is_installed
  
  
  def test_influxdb_config_has_collectd_enabled(File):
      config = File("/etc/influxdb/influxdb.conf").content_string
      assert "[[collectd]]\n  enabled = true" in config
  
subject: Add some explanation about copypasta'd fixture.