Missing dep8 tests

As fetchmail is a service, it should have (at least) three types of tests:

1. Check that primary bits are installed, and that fetchmail --version / --help aren't erroring.

2. Check that the service is up

3. Check operation by setting up a local POP3 mail service, sending an email to it, and verifying fetchmail fetches the email. Dovecot includes some dep8 tests that could be repurposed for setting up the mail service here.

Extra credit would repeat #3 but with IMAP and/or SSL.

I don't think fetchmailconf is worth testing; it appears to be an X11 utility without command line operational functionality.

This bug was fixed in the package fetchmail - 6.4.0~beta4-3ubuntu1

---------------
fetchmail (6.4.0~beta4-3ubuntu1) eoan; urgency=medium

  * Merge with Debian unstable. Remaining changes:
    - d/p/sni-support.patch: TLS: set hostname for SNI. Thanks to Matthias
      Andree <email address hidden> (LP #1798786)
  * Added Changes:
    - d/p/clang-robustness.patch: Backport clang null pointer checks from upstream
      to prevent potential segfaults.
    - d/p/set-umask-for-fetchids.patch: Backport upstream fix to set umask
      properly before writing the .fetchids file.
    - d/p/tests: Add preliminary/basic dep8 tests to check installation and
      service operation.
      (Partial fix for LP: #1677818)

fetchmail (6.4.0~beta4-3) unstable; urgency=medium

  * Backport fix potential SIGSEGV in pop3_delete (closes: #921450).
  * Backport native name verification for OpenSSL.

fetchmail (6.4.0~beta4-2) unstable; urgency=medium

  * Upload to Sid.
  * Update Standards-Version to 4.3.0 .

fetchmail (6.4.0~beta4-1) experimental; urgency=medium

  * New major upstream beta release:
    - improved TLS support (closes: #768843).
  * Update watch file.
  * Disable Vcs-* fields for now.
  * Update debhelper level to 11:
    - remove dh-autoreconf build dependency,
    - remove autotools-dev build dependency,
    - don't specify parallel to debhelper,
    - specify restart-after-upgrade to dh_installinit .
  * Update Standards-Version to 4.1.4 .

  [ Russell Coker <email address hidden> ]
  * Run restorecon after creating directory from init script (closes: #752598).

  [ Nicolas Boulenguez <email address hidden> ]
  * Packaging updates (closes: #895366):
    - rename d/init to d/fetchmail.init, as recommended by policy,
    - give standard formatting to header of 01_fetchmailconf.patch ,
    - remove obsolete debian/pycompat ,
    - fix typo in manpage,
    - delegate installation of ppp and logcheck scripts to debhelper,
    - delegate manpages from dh_install to more specialized
      dh_installmanpages ,
    - install contrib files and resolvconf directly without intermediate copy
      in debian/tmp ,
    - switch copyright to format 1.0 and add some missing licenses.
    - delegate buggy installation of README.contrib to debhelper,
    - per policy 4.0.0, use invoke-rc.d instead of calling /etc/init.d/*
      directly,
    - rules: drop paragraphe preparing unused variable CONFFLAGS ,
    - rules: simplify some variable affectations,
    - delegate build flags stuff to dpkg-buildflags .

  [ Kevin Ryde <email address hidden> ]
  * Let fetchmail-mode run hook after other settings (closes: #710319).

 -- Bryce Harrington <email address hidden> Sun, 16 Jun 2019 18:45:16 -0700

Looks like the upload closed the bug, but as mentioned there's at least one more test needing written before we can consider this complete.

This bug was fixed in the package fetchmail - 6.4.16-1ubuntu1

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fetchmail (6.4.16-1ubuntu1) hirsute; urgency=medium

  * d/t/control: Invoke upstream testsuite via make check.
  * d/t/control, d/t/operation, d/t/mock-pop3-server.py: Add DEP8 test
    for checking fetchmail's POP3 functionality.
    (LP: #1677818)

 -- Bryce Harrington <email address hidden> Thu, 04 Mar 2021 18:40:28 +0000