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Testing legacy code

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  • 11-11-2014 6:44pm
    #1
    Smoggy
    Registered Users Posts: 1,466 ✭✭✭


    Does anyone know of a good book or website that goes it strategies for (unit) testing legacy code that wasn't designed with testing in mind, such a no DI seams.

    Language is C# if that makes a difference.


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    #2
    c_man
    Closed Accounts Posts: 4,436 ✭✭✭c_man


    I swear by this - http://www.amazon.com/Working-Effectively-Legacy-Michael-Feathers/dp/0131177052


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    #3
    Smoggy
    Registered Users Posts: 1,466 ✭✭✭Smoggy


    c_man wrote: »
    I swear by this - http://www.amazon.com/Working-Effectively-Legacy-Michael-Feathers/dp/0131177052

    Being 10 years old doesn't matter ? The principles still hold up ?


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    #4
    c_man
    Closed Accounts Posts: 4,436 ✭✭✭c_man


    Smoggy wrote: »
    Being 10 years old doesn't matter ? The principles still hold up ?

    Nope! That book more than anything else, helped me getting a particularly... troublesome module under some sort of control.

    In fact I started a thread kinda like this a year ago you should check out - http://www.boards.ie/vbulletin/showthread.php?p=87011342


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    #5
    Smoggy
    Registered Users Posts: 1,466 ✭✭✭Smoggy


    Thanks C_Man - I have that on order now :)


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    #6
    Smoggy
    Registered Users Posts: 1,466 ✭✭✭Smoggy


    Have I dreamed these up ?

    Are there such things as AutoMocks, where their functionality would be to mark code for mimic, record interaction on the first play through and mimic it back when under test ?

    It's more than possible that I have made this up :) But If I haven't it needs to be developed. Google hasn't shown me anything, but I don't really know what I'm searching for :)


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    #7
    Tow
    Registered Users Posts: 7,242 ✭✭✭Tow


    C# = legacy code :-)

    When is the money (including lost growth) Michael Noonan took in the Pension Levy going to be paid back?



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    #8
    Lemming
    Registered Users Posts: 14,148 ✭✭✭✭Lemming


    Tow wrote: »
    C# = legacy code :-)

    I'm almost afraid to ask this question for fear of feeding a troll; but what exactly isn't legacy code then if C# is considered legacy code?


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    #9
    NinetyForNone
    Registered Users Posts: 361 ✭✭NinetyForNone


    Lemming wrote: »
    C# is considered legacy code?
    From Wikipedia page on Legacy code
    ...source code inherited from someone else and source code inherited from an older version of the software.


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    #10
    TrueDub
    Moderators, Sports Moderators, Regional Abroad Moderators Posts: 2,646 Mod ✭✭✭✭TrueDub


    Alternatively, legacy code is code you've inherited from someone else which doesn't fit with the latest techniques, or with the fad-du-jour in that particular programming language or genre.


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    #11
    Smoggy
    Registered Users Posts: 1,466 ✭✭✭Smoggy


    I can assure you this code is legacy code, you too would agree if you saw it.


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    #12
    c_man
    Closed Accounts Posts: 4,436 ✭✭✭c_man


    Lol. I'd say that legacy code, is any code that is not under any kind of test... Now why can't we just all get along? :)


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    #13
    croo
    Moderators, Technology & Internet Moderators Posts: 1,334 Mod ✭✭✭✭croo


    Smoggy wrote: »
    ...where their functionality would be to mark code for mimic...
    Don't know about that bit ...
    Smoggy wrote: »
    record interaction on the first play through and mimic it back when under test ?
    But the Open Source Selenium project does this for webapps


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    #14
    Smoggy
    Registered Users Posts: 1,466 ✭✭✭Smoggy


    c_man wrote: »
    Lol. I'd say that legacy code, is any code that is not under any kind of test... Now why can't we just all get along? :)


    +1
    I like this definition.


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