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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?

go tls1.2

share|improve this question

edited Mar 7 at 20:24

Pikachu the Purple Wizard

2,02761329

asked Mar 7 at 20:23

jazzjazz

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
  

  
  
  
  

add a comment | 

-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?

go tls1.2

share|improve this question

edited Mar 7 at 20:24

Pikachu the Purple Wizard

2,02761329

asked Mar 7 at 20:23

jazzjazz

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
  

  
  
  
  

add a comment | 

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

edited Mar 7 at 20:24

Pikachu the Purple Wizard

2,02761329

asked Mar 7 at 20:23

jazzjazz

72

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

share|improve this question

edited Mar 7 at 20:24

Pikachu the Purple Wizard

2,02761329

asked Mar 7 at 20:23

jazzjazz

72

share|improve this question

edited Mar 7 at 20:24

Pikachu the Purple Wizard

2,02761329

asked Mar 7 at 20:23

jazzjazz

72

edited Mar 7 at 20:24

Pikachu the Purple Wizard

2,02761329

edited Mar 7 at 20:24

Pikachu the Purple Wizard

2,02761329

asked Mar 7 at 20:23

jazzjazz

72

asked Mar 7 at 20:23

jazzjazz

72

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

answered Mar 7 at 23:07

jazzjazz

72

add a comment | 

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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

answered Mar 7 at 23:07

jazzjazz

72

add a comment | 

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

answered Mar 7 at 23:07

jazzjazz

72

add a comment | 

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

answered Mar 7 at 23:07

jazzjazz

72

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

share|improve this answer

answered Mar 7 at 23:07

jazzjazz

72

answered Mar 7 at 23:07

jazzjazz

72

answered Mar 7 at 23:07

jazzjazz

72