Why is Testing important?

Why is writing tests for your code as important as writing code for your product?

We write Tests to check/test:

  • If the functionalities of the code you wrote or added are working properly.
  • If the new code you added is not breaking the old existing one.

So it’s better to catch the bugs of your code before it reaches to others 😉 .

I was working on fedora-bodhi for last few days and I chose an issue from there to work on. Though it looked simple enough but it really needed some tricks to solve the bug. The interesting thing is that it was not clearly visible that we have to apply some tricks to solve the issue. And I came to know that I had to apply some tricks after I wrote tests for the code I added.

So the solution for the issue has the following conditions:

  1. When an update of a build in bodhi is ‘pending’ and it requests for ‘testing’ and if that request is revoked, the status of that build should be set to ‘unpushed’.
  2. When an update of a build in bodhi is ‘testing’ and it requests for ‘stable’ and if that request is revoked, the status of that build should be set to ‘testing’.

I pushed a patch for it accordingly and received positive comment from threebean 🙂 . Then threebean and lmacken told me to write test for it, because “Sometimes what we see is not the truth!!” . If you look at the patch it really seemed to work. But when I wrote test for the code I added, the test was failing. As pingou suggested I tried printing some debugging statements to make sure if the test is exercising the code I added. Hence I came to know that the test is not going through the code :|. After struggling for a day I catched that my code was conflicting here which also has action ‘revoke’.

Then I modified my code to solve that conflict and received positive review from pingou 😉 .

Now I strongly feel why writing test is as important as writing code and testing makes you write better code as well 🙂 . The earlier patch was not behaving the way it was expected to behave. I wouldn’t realize that my earlier patch would fall if I didn’t write tests for it and if that patch would be merged the bug would be realized after it reached to masses. So isn’t it a smart practice to catch bug of your code by writing tests before it reaches to masses? 😉

The PR can be found here which is finally merged. Thanks to pingou for continuously reviewing my patches and thanks to threebean and lmacken for encouraging and helping me to write tests 🙂 .