Everybody has seen pictures like «N unit tests, 0 integration tests», and almost everyone understands just how important testing is: from unit to e2e.
But after any release, you still get users running to tell you that nothing works. Why? Large applications have a litany of external factors that can’t be tested: from poor internet connections to a suddenly expired certificate on one of a user’s dozens of servers.
This is where analytics comes in, collecting data from real users.
In this presentation, we will discuss: