[tor-bugs] #15236 [Tor]: Identify functions most in need of testing, and hardest to test

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#15236: Identify functions most in need of testing, and hardest to test
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 Reporter:  nickm     |          Owner:
     Type:  task      |         Status:  new
 Priority:  normal    |      Milestone:  Tor: 0.2.7.x-final
Component:  Tor       |        Version:
 Keywords:  SponsorS  |  Actual Points:
Parent ID:            |         Points:
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 In addition to our opportunistic write-tests-as-you-go approach, we should
 also direct our testing efforts on the functions that most *need* to be
 tested.  This includes (possibly)

   * Big functions
   * Volatile functions (ones that have changed many times)
   * Functions that have had lots of bugs in them in the past
   * Functions nobody understands
   * Functions with high complexity
   * Functions with high complexity-to-line ratio
   * Functions with high code-to-comments ratio

 We should also look at what's ''hardest'' to test, including possibly

   * Anything that hits the OS directly
   * Anything that's windows only.
   * Anything that calls many other functions
   * Anything that calls many other modules
   * Anything that indirectly calls most of the rest of Tor.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15236>
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