Add a Less method unit test

[dlion]

I saw there is a lack of unit test so I started to contribute to it creating just one, specifically for the Less method in which we can find some logic that I think worth to be tested.

ps: can you add the #hacktoberfest label to the project or sign this PR with the label hacktoberfest-accepted in order to be considered eligible for it? Thanks

[muesli]

Thanks for the PR @dlion! I'll review it this weekend. In the meantime I've already added the hacktoberfest label to our repos.

[dlion]

Hi @muesli , any news about this PR?