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Unit Testing tls.LoadX509KeyPair fails if no certs provided


In Go,how to get test environment at run time?Mock functions in GoGood unit testing in GoGolang mocking functions for http handler testsUnit testing os.File.Write callHow would you unit test a method whose only purpose to make a Database call?Unit testing tls clientUnit Testing Strategy for Database Connection get in GolangApproaches to testing negative scenarios in Gowrite Golang unit test for function that expects a key pressed to continueMocking with pointer reference in function parameters for unit test













-1















cert, err := tls.LoadX509KeyPair(os.Getenv("CERT"), os.Getenv("KEY"))
if err != nil
return err



I want to write a unit test for a function that contains this snippet of code. However, my test environment will never have any content in os.Getenv("CERT")/os.Getenv("KEY"). This makes the code(tls.LoadX509KeyPair()) return an error, which doesn't let me test the function.
How should I go about mocking/modifying this snippet?










share|improve this question



















  • 1





    Refactor. If the code under test relies on an environment that isn't reproduced under test, either you can't test it or you have to refactor it.

    – Adrian
    Mar 7 at 20:30











  • You mean using os.Getenv() in go code is a bad practice?

    – jazz
    Mar 7 at 21:15











  • No, there's nothing wrong with it. I mean the broader sense of "environment" - the environment variables, local files (e.g. certificates), etc.

    – Adrian
    Mar 7 at 21:28















-1















cert, err := tls.LoadX509KeyPair(os.Getenv("CERT"), os.Getenv("KEY"))
if err != nil
return err



I want to write a unit test for a function that contains this snippet of code. However, my test environment will never have any content in os.Getenv("CERT")/os.Getenv("KEY"). This makes the code(tls.LoadX509KeyPair()) return an error, which doesn't let me test the function.
How should I go about mocking/modifying this snippet?










share|improve this question



















  • 1





    Refactor. If the code under test relies on an environment that isn't reproduced under test, either you can't test it or you have to refactor it.

    – Adrian
    Mar 7 at 20:30











  • You mean using os.Getenv() in go code is a bad practice?

    – jazz
    Mar 7 at 21:15











  • No, there's nothing wrong with it. I mean the broader sense of "environment" - the environment variables, local files (e.g. certificates), etc.

    – Adrian
    Mar 7 at 21:28













-1












-1








-1








cert, err := tls.LoadX509KeyPair(os.Getenv("CERT"), os.Getenv("KEY"))
if err != nil
return err



I want to write a unit test for a function that contains this snippet of code. However, my test environment will never have any content in os.Getenv("CERT")/os.Getenv("KEY"). This makes the code(tls.LoadX509KeyPair()) return an error, which doesn't let me test the function.
How should I go about mocking/modifying this snippet?










share|improve this question
















cert, err := tls.LoadX509KeyPair(os.Getenv("CERT"), os.Getenv("KEY"))
if err != nil
return err



I want to write a unit test for a function that contains this snippet of code. However, my test environment will never have any content in os.Getenv("CERT")/os.Getenv("KEY"). This makes the code(tls.LoadX509KeyPair()) return an error, which doesn't let me test the function.
How should I go about mocking/modifying this snippet?







go tls1.2






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 7 at 20:24









Pikachu the Purple Wizard

2,02761329




2,02761329










asked Mar 7 at 20:23









jazzjazz

72




72







  • 1





    Refactor. If the code under test relies on an environment that isn't reproduced under test, either you can't test it or you have to refactor it.

    – Adrian
    Mar 7 at 20:30











  • You mean using os.Getenv() in go code is a bad practice?

    – jazz
    Mar 7 at 21:15











  • No, there's nothing wrong with it. I mean the broader sense of "environment" - the environment variables, local files (e.g. certificates), etc.

    – Adrian
    Mar 7 at 21:28












  • 1





    Refactor. If the code under test relies on an environment that isn't reproduced under test, either you can't test it or you have to refactor it.

    – Adrian
    Mar 7 at 20:30











  • You mean using os.Getenv() in go code is a bad practice?

    – jazz
    Mar 7 at 21:15











  • No, there's nothing wrong with it. I mean the broader sense of "environment" - the environment variables, local files (e.g. certificates), etc.

    – Adrian
    Mar 7 at 21:28







1




1





Refactor. If the code under test relies on an environment that isn't reproduced under test, either you can't test it or you have to refactor it.

– Adrian
Mar 7 at 20:30





Refactor. If the code under test relies on an environment that isn't reproduced under test, either you can't test it or you have to refactor it.

– Adrian
Mar 7 at 20:30













You mean using os.Getenv() in go code is a bad practice?

– jazz
Mar 7 at 21:15





You mean using os.Getenv() in go code is a bad practice?

– jazz
Mar 7 at 21:15













No, there's nothing wrong with it. I mean the broader sense of "environment" - the environment variables, local files (e.g. certificates), etc.

– Adrian
Mar 7 at 21:28





No, there's nothing wrong with it. I mean the broader sense of "environment" - the environment variables, local files (e.g. certificates), etc.

– Adrian
Mar 7 at 21:28












1 Answer
1






active

oldest

votes


















0














This works by defining vars for the certFile and keyFile and then overriding them in the test environment.



//.. 
var certFile = os.Getenv("CERT")
var keyFile = os.Getenv("KEY")
//...
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil
return err



Follow the below link to see how to override the vars in a test env.
In Go,how to get test environment at run time?






share|improve this answer






















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    1 Answer
    1






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    active

    oldest

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    active

    oldest

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    0














    This works by defining vars for the certFile and keyFile and then overriding them in the test environment.



    //.. 
    var certFile = os.Getenv("CERT")
    var keyFile = os.Getenv("KEY")
    //...
    cert, err := tls.LoadX509KeyPair(certFile, keyFile)
    if err != nil
    return err



    Follow the below link to see how to override the vars in a test env.
    In Go,how to get test environment at run time?






    share|improve this answer



























      0














      This works by defining vars for the certFile and keyFile and then overriding them in the test environment.



      //.. 
      var certFile = os.Getenv("CERT")
      var keyFile = os.Getenv("KEY")
      //...
      cert, err := tls.LoadX509KeyPair(certFile, keyFile)
      if err != nil
      return err



      Follow the below link to see how to override the vars in a test env.
      In Go,how to get test environment at run time?






      share|improve this answer

























        0












        0








        0







        This works by defining vars for the certFile and keyFile and then overriding them in the test environment.



        //.. 
        var certFile = os.Getenv("CERT")
        var keyFile = os.Getenv("KEY")
        //...
        cert, err := tls.LoadX509KeyPair(certFile, keyFile)
        if err != nil
        return err



        Follow the below link to see how to override the vars in a test env.
        In Go,how to get test environment at run time?






        share|improve this answer













        This works by defining vars for the certFile and keyFile and then overriding them in the test environment.



        //.. 
        var certFile = os.Getenv("CERT")
        var keyFile = os.Getenv("KEY")
        //...
        cert, err := tls.LoadX509KeyPair(certFile, keyFile)
        if err != nil
        return err



        Follow the below link to see how to override the vars in a test env.
        In Go,how to get test environment at run time?







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 7 at 23:07









        jazzjazz

        72




        72





























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