How to Test? Is unit testing really helpful?
My presentation form last Meet.JS: http://goo.gl/u7w61 (in Polish)
I must admit that I was influenced by inventing-on-principle by Bret Victor
Hopefully this presentation encourage people to think about testing as a way to speed up development, not as a cost :-)
If you attended last Meet.JS let me know what you think, I wasn't as good as Bret so I will be glad for comments how to be better :-)