Testing a specific function of a shell script

[brainwo]

I have my script with format like this:

func_a(){
	...
}

func_b(){
    ...
}

main(){
    ...
}

main "$@"

How do I test func_a and func_b individually?
I came up with source my-script.sh; func_a "input" but this executes the main function.

[martin-schulze-vireso]

If you can, separate the functions into their own file and source only that during testing.

I believe preventing bash from running the free code in the source is hard to generalize.

[brainwo]

I see, I have to write a build script to produce a single file script or just to toggle the free code then.

Thank you for the lead. Appreciated that.

[jaredmcphillen]

@brainwo You didn't necessarily need to write a separate script. you can somewhat easily solve this in your current script, like this:

func_a(){
	...
}

func_b(){
    ...
}

main(){
    ...
}
# Check if the script is being executed directly or if it's being sourced

if [ "$0" = "$BASH_SOURCE" ]; then

    # this code is called if you're running the script directly from the shell.
    # ie. from the shell doing a './myscript.sh'
    main "$@"

else

    # This code will run when the script is sourced. with a 'source myscript.sh'
   echo "thank you for sourcing my script. enjoy."
fi

Hopefully that's helpful. Sorry, didn't see this until just now. The above is at least what I do and has worked well enough for a fair amount of time.

[brainwo]

Sweet, thank you!