Ever wondered how you went to YouTube to watch just a five-minute video but ended up there for three hours? Or saw an advertisement for exactly the same thing that you'd been planning to buy for a while and ended up finally buying it? Isn’t it great how your computer knows what you have been desiring? Well, it’s not your computer but the algorithmic bots that have watch you all the time — even now! So, the question is, How are these bots made and how do software testing concepts come into play?
https://dzone.com/articles/machine-learning-if-its-testable-its-teachable