Adding the base of a test framework

[MartinKondor]

Hy, I think it would be a great improvement for a11ygator to test it's functionalities.

I didn't find any tests here, so I made the base of a small framework in order to be able to test the most important parts.

Feel free to give advice, or to propose change.

Have a nice day!

[nicolocarpignoli]

Hi, thanks for your interest on a11ygator! 🐊
Please, can you also provide an example of a real test use case for a Browser extension?

[MartinKondor]

Can be used like in 8dbe576

But I am concerned that a lot of functions are using the browser variable which is only available from an extension (or I miss something?), so I guess that later on the tests should be only available from the extension itself, like the source link now. It would be just a link somewhere in the popup, if there is a need for tests.

When I saw a11ygator's repository I was honestly surprised that this project doesn't have tests, so that's why I made this pull request.