Testing Blog

Cost of Testing

Friday, October 02, 2009
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Labels: Misko Hevery

6 comments :

  1. JustinOctober 2, 2009 at 11:50:00 AM PDT

    Impressive analysis! I think people could quibble with your hours estimate, but that's really just a bikeshed argument.

    Those four bullets explaining the benefits of your test "tax" are probably the best justification for test-driven development that I have ever ready.

    An independent or spare-time developer really benefits from the "tax" since its so much easier to get back into your code, start modifying locally, and not worry too much about breaking the rest of system. You typical MegaCorp can just throw money at the problem, so its masked, but for those running lean you can't do that. Also a MegaCorp that wants to make more profit would do well to heed this advice.

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  2. UnknownOctober 2, 2009 at 3:38:00 PM PDT

    boolean not bolean, right?

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  3. Kashif Ali HabibOctober 2, 2009 at 10:00:00 PM PDT

    Nice post Misko :)

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  4. Marius GedminasOctober 3, 2009 at 8:06:00 PM PDT

    Is it possible that the cost of test code depends upon the nature of the production code? 10% for leaf functions like this one, more for components in the middle of the application that interact with other components and require you to write stubs (or set up complicated fixtures) in order to test?

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  5. Shrini KulkarniOctober 14, 2009 at 11:26:00 AM PDT

    Good post...

    But I am puzzled. What makes you to belive that writing units tests is all that is required for testing. Is that all you do for testing?

    Shrini Kulkarni

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  6. UnknownNovember 11, 2009 at 5:34:00 AM PST

    Hi Misko,

    My name is Gil Zilberfeld, and with my colleague, Roy Osherove, we do a little video cast called "what's new in testing".

    This week we mention your analysis, so I invite you to come. If you like what you see, please promote us.

    Thanks,

    Gil Zilberfeld
    Typemock

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