Testing is a developer job

lack-of-testingMaybe you have heard about the various discussions about Test-Driven Development (TDD). Is it worth it? Does it lead to good design? … In this blog post I will not speak about this kind of practice, just “classical” tests.

When I started my software developer career, I knew nothing about automated testing (unit or not). I wish I did, it would have save me a lot of time and a lot of trouble back then.

The pain of legacy code

I started my life as a software developer in a small company, I had no experience and I was alone on the project, which was several years old. I had to deal with a “big ball of mud” where I was afraid of touching anything because I did not knew anything about the consequences it might have.

Yet, I had to fix bugs and to implement new functionalities in order to improve the application. Of course, I did not test much my changes, only that the bug is fixed or the new feature works as expected on my local machine. And every time it had unseen consequences because the code is highly coupled and changing one part of the source code change the behavior elsewhere.

I wish I had tests at that time to prevent me from working in fear, fear of breaking things, fear of regression. But I’m also guilty in this story because the number of tests I have added during this period is ZERO… My contribution was to make the whole thing worse by adding more legacy code.

I now realise that I was behaving un-professionally, legacy system is a real pain to work with and it is my job as a software developer to avoid creating this kind of mess. We have the tool and practices to make things better, we can add tests, we can refactor bad written code.

Whatever… QA will test it

Now I work for a larger company with several development teams, each one of them has a QA to validate the work done by the developers. I think that having QAs within the teams is a wonderful thing, they will check new feature and potential regression before a production release.

But sometimes I feel like that some developers see this situation as an excuse to be lazy. “I just code, I won’t test it, this is the job of the QA”. What?! Are you serious? Your code does not even compile! Sure the QA will test it and they will just say: “It doesn’t work”. They can’t even test a single feature because the entire system cannot be built.

This might look far-fetched but I’ve seen situations like this one, several times unfortunately.

Sometimes, the code “works” but what has been asked is not done, the code has been written and it compiles. Yet, when opening the page (example of a website), the new element is not present… It’s the developer job to open the site to make sure that it works as expected from end to end, at least locally. Again, I’ve seen it many times, with my own work as well.

In my opinion, QA should find nothing, if they do I have failed at some point. If the issue is technical, I made a fault and I need to fix it ASAP and learn from it. What do I’ve missed? How to prevent that from happening again? Is there a unit test I can write? If the problem is a business issue (not doing was it is supposed to do), then again: what did I missed? Is there an acceptance test that needs to be written? Did I know all the domain related details? If not, why?

Always learn from your mistakes and a feature not validated by QA is a mistake. QAs are not hired to piss developers off, they are paid to make sure the products are viable from a quality point of view. We are not paid to write code, we are paid to automate process, and make them work! QAs are here to help, not to do our job.

I’ve been down this road and this is why I make this blog post, to share my experience and my failures. I love my job as a software developer and I want to be proud of what I’m creating, I want to be considered as a real software professional. There are ways to improve how we work, from a technical point of view and an attitude point of view.

Testing is a developer job, unit testing, integration testing, manual testing, all of them. It’s our job to make sure everything works.

See you next time!

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5 thoughts on “Testing is a developer job

  1. I am going to play devil’s advocate here for the sake of creating a discussion:

    Q.A. should never find anything,
    Therefore Q.A. never have any work to do
    Therefore Q.A. are paid to do nothing.
    Therefore Q.A. are a waste of resource.


    • Hi Kevin, thanks for the comment.

      In a world where developers are able to test everything and the QAs never find anything, it can be considered as a waste of resource.
      Yet I think that you can have QA even if they never find any bug or regression. They write the acceptance tests scenarios (Given-When-Then) with the business analysts for both happy paths and error paths.

      I believe we tend to think that the QAs are present to control the work of the developers.Whereas they can have a support role helping the developers to understand the domain needs and what are the quality criteria.
      In my opinion it is not the Developer VS the QA, it’s the Developer WITH the QA.


      • I strongly agree with your last point. Too often teams slip into a “throw it over the wall” culture. Developers and QA are equally responsible and accountable for quality and need to work together closely to achieve that well.

        Liked by 1 person

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