Month: September, 2017

Unit test – purist versus practical


Whenever you ask a question on unit testing in a forum there is always that one person whose only job is to point out that what you are doing is not unit testing but integration testing. It is important to know this difference but it is more important to not lose sight of the goal. Also, you need to adopt a terminology that works for you and your team rather than what purists think or say.

In absolute terms, if a test depends on anything that is not in your control, then it is not a unit test. For example, if a method that you are testing uses a public function or a function from an included library or a database or an external API, then it is not a unit test but an integration test. For a test to qualify as a unit test, you need to mock all these dependencies and get them under control, only then you can claim your test as unit test. Now that we have the purists happy, let us move to a more practical world view.

When a regular joe developer refers to a test as unit test, what she means is she is trying to test a functionality in a massive gnarly application that she thinks is a small independent unit. This unit might have some components that is not under her control. A regression test would test how these units behave when interconnected. Instead of debating whether what she is doing is unit testing, a better discussion in my opinion is trying to figure out what is the intention of the test and what needs to be controlled and not. Figuring this out and working on achieving this will add more value than debating whether something is a unit test or not.


Fighting change

Ninja Fighter Sword

In my new workplace, I was given a brand new shiny MacBook Pro. My first reaction was to ask for a Ubuntu laptop. My brain justified by giving several reasons, it is developer friendly, softwares that you run on a server can be run as is in ubuntu, etc etc. I was almost about to voice this opinion, but system 2 took over from system 1. It started asking questions along the lines of is this really the reason you want a Ubuntu machine or are you just trying to avoid the unfamiliar. You have not used a Mac before and are you trying to run away from something new? The two debated for sometime and settled on giving the Mac a chance. So far, the experience has been wonderful and I am learning some cool things like using gestures for different actions etc.

Whenever something new and unfamiliar comes across us, the first reaction for most of us is to fight against it. Take a step back, analyse whether this is the primal part of the brain trying to fight against the unfamiliar or you really have a valid reason not to.

Altruism FTW

Have you observed the way Google maps asks for info about local joints and places? They word it in such a manner that it sounds like you are helping others to make an informed decision along the lines of “Give us more info to help others”. What they are doing in effect is appealing to the altruism in all of us to generate more info to make their product better.

I think this is a great way to ask for more data in this world of user generated content. Instead of asking to review a restaurant how about wording it as “Review this place so that others can discover great food”. Instead of asking people to rate your app how about saying “Help your friends discover the app on playstore, rate us”. It would be interesting to A/B test this and see the result.