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  1. #1
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    "Spectrum" of White Box ---- Black Box test types

    Has anyone ever heard of this?

    Not just Black box and White box testing, but the concept of a spectrum or rainbow of the black to white types?

    I have always held the idea of "buckets" labeled BLACK and WHITE, and the occasional GRAY box items.

    I was at the PSQT/PSTT North conference and took Dan Mosley's class 'From Requirements to Test Data' and he talked about the spectrum.

    All the test types would fall somewhere along the line and not necessarily within one "bucket".

    Thoughts?
    Jean James
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    I deliver what I promise, and I only promise what I can deliver.
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  2. #2
    Moderator JakeBrake's Avatar
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    Re: "Spectrum" of White Box ---- Black Box test types

    I think a spectrum analogue is valid especially if one has a solid definition of at least the ends with the 'pots of gold' and one point in-between. I would be skeptical of defining what goes with every color of the spectrum - if that is what is implied above. I don't think there are enough people on this planet to do that.

    I think the bottom line is:

    Do the definitions supplied provide a valid framework in which expectations, roles, and responsibilities can be reasonably established to assure reasonable test coverage and the knowledge of items/areas not covered intentionally?

    I think white (glass), gray (design-based), and black are all that are necessary.


    I can imagine a definition of blue box testing:

    "Trying to categorize tests into individually colored buckets of the visible spectrum until I and my descendants (10 to the 18th) times removed turned blue in the face."

    Look at the difficulties today in just trying to lump tests into black or white box category. Hmmmm... add a few million colors ... hmmm

    Imagine one person trying to memorize the meanings of the various colored buckets - an impossible feat with today's human faculties; Ellen Woods or not.

    I prefer magenta box testing. [img]images/icons/smile.gif[/img] [img]images/icons/smile.gif[/img]

    [ 09-17-2003, 06:01 AM: Message edited by: jpensyl ]

  3. #3
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    Re: "Spectrum" of White Box ---- Black Box test types

    I can imagine a definition of blue box testing:

    "Trying to categorize tests into individually colored buckets of the visible spectrum until I and my descendants (10 to the 18th) times removed turned blue in the face."
    <font size="2" face="Verdana, Arial, Helvetica">[img]images/icons/grin.gif[/img] This one made me spit coffee all over my keyboard! [img]images/icons/grin.gif[/img] It's 5:30am buddy, give me a break [img]images/icons/smile.gif[/img]

    Actually Dan Mosely was talking only of the spectrum of white-gray-black without the other colors of the spectrum. It does make sense sometimes you think? What is PURE black box testing and what is PURE white box testing. I'd bet none of us always follow those specific paths, that we peek under the covers even in black box testing.
    Jean James
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    I deliver what I promise, and I only promise what I can deliver.
    ------------------------------------------------------------

  4. #4
    Moderator JakeBrake's Avatar
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    Re: "Spectrum" of White Box ---- Black Box test types

    Jean,

    I hope the coffee was fresh [img]images/icons/smile.gif[/img]

    Rainbow does suggest other colors?!?

    Regarding:
    "What is PURE black box testing and what is PURE white box testing. I'd bet none of us always follow those specific paths, that we peek under the covers even in black box testing."

    I don't believe pure is achievable. If it is, then I would expect pure software to be achievable. That would put us out of work!

    While I think it is great to strive for high standards, I think that sometimes too much effort goes into refinement of the box-types of testing.

 

 

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