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backus's profile
John Backus
John Backus
John Backus
@backus

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John Backus

@backus

Seeking alternative compression. Hopefully wrong on average. Shameless. Started @getcognito and @bloom

San Francisco, CA
Joined August 2012

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    1. John Backus‏ @backus 12 Nov 2015
      Replying to @backus

      @jbackus3 Seeing every place the test suite allows old code to change is powerful. Each mutation = potential bug you wouldn't catch

      2 replies 0 retweets 1 like
    2. Sean‏ @mifreewil 12 Nov 2015
      Replying to @backus

      @jbackus3 maybe more strict with critical pieces, less so with others - just like most test coverage i suppose?

      3 replies 0 retweets 0 likes
    3. John Backus‏ @backus 12 Nov 2015
      Replying to @mifreewil

      @mifreewil I think with time it results in you writing better code and tests, so there isn't much additional work

      1 reply 0 retweets 0 likes
    4. Sean‏ @mifreewil 12 Nov 2015
      Replying to @backus

      @jbackus3 doesn't overfocus though on low mutation = too many tests = large overhead in changing/refactoring any existing code?

      1 reply 0 retweets 0 likes
    5. John Backus‏ @backus 12 Nov 2015
      Replying to @mifreewil

      @mifreewil Not sure I'm following this point.

      1 reply 0 retweets 0 likes
    6. Sean‏ @mifreewil 12 Nov 2015
      Replying to @backus

      @jbackus3 w/ low mutation, in order to change any part of the code, you have to also modify a large number of tests, slowing productivity

      1 reply 0 retweets 0 likes
    7. John Backus‏ @backus 12 Nov 2015
      Replying to @mifreewil

      @mifreewil Well it depends. Usually I have to write tests that weren't there and should be.

      2 replies 0 retweets 0 likes
    8. Markus Schirp‏ @_m_b_j_ 12 Nov 2015
      Replying to @backus

      @jbackus3 @mifreewil For legacy code you can before refactoring kill all mutations via tests / code reduction.

      1 reply 0 retweets 2 likes
    9. Markus Schirp‏ @_m_b_j_ 12 Nov 2015
      Replying to @_m_b_j_

      @jbackus3 @mifreewil If all tests go through a mostly unaltered public API you can than use them as refactoring-anchor.

      1 reply 0 retweets 2 likes
    10. John Backus‏ @backus 12 Nov 2015
      Replying to @_m_b_j_

      @_m_b_j_ @mifreewil mbj beat me to this point. IMO big productivity drop means either technical debt, bad tests, or not caring about quality

      1 reply 0 retweets 1 like
      John Backus‏ @backus 12 Nov 2015

      @_m_b_j_ @mifreewil Note mutant allows you to say "only test code that change since [COMMIT]." This means debt doesn't affect unrelated code

      2:36 PM - 12 Nov 2015
      0 replies 0 retweets 0 likes

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