@SerhatKayaa thank you for doing this fix for #27. Could you also include an update to the package.json to add the new dev dependencies of Jest and Spectron as well? I can resolve any issues that come up around the package-lock.json in my own commit (those get ugly in PRs). Also please include a newline at the end of the new test file.

Thank you for continuing to work on this. Looks like this draft now moves several of the app files into a src directory. Can you either explain that choice or revise again to undo that part of the changes.

Sorry for late response, Main src folder is general approach in javascript world. I think you should seperate your folder in src directory.I tried that i change the jest rootDirectory then i get an error without src folder, I'll share you two different electron app, you can look at that project structure. Thank you
https://github.com/martpie/museeks
https://github.com/microsoft/vscode

Sure, although there are plenty of electron projects that elect to use /app or /app/src. More importantly when you moved everything you didn't update any of the internal references so if you run npm start in your branch nothing works. Jest's roots directive should allow you to set the app directory. A fully project refactor is something I'm open to considering but that would be a separate issue from just enabling a testing framework.

I think,it's okey right now, can you check this code ?

The current PR seems to delete all the main project files.