Adding tests for input config for different scenarios(show in the console, write in a file and put into string variable)

[amingolmahalle]

When setting config for showing curl script in the console or writing in a file. we need to write tests for these scenarios. I mean these files: https://github.com/amingolmahalle/HttpClientToCurlGenerator/tree/master/src/HttpClientToCurl/Config as of now, we just tested for scenarios where the input option is null.

[Shahinmm69]

@naeemaei please assign me

[naeemaei]

@Shahinmm69 It's for you!