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Agilemania, a small group of passionate Lean-Agile-DevOps consultants and trainers, is the most tru... Read more
Agilemania, a small group of passionate Lean-Agile-DevOps consultants and trainers, is the most tru... Read more
If there’s one thing that both large and small organizations desire, it’s to create a product that drives a tangible business result. When this is the goal, the term TDD or Test Driven Development can often be seen discussed by developers and management alike.
If you’re new to the term TDD or less familiar with the concept, here’s a concrete guide to help you understand TDD, its process, benefits, and much more. Let’s go!
Test-Driven Development (TDD) refers to the practice of writing a piece of code only if the automated test has failed. The approach states that one should write “implementation code” only if there is a “failing test case”. It is an iterative approach for developing software products where –
Here is a step-by-step process demonstrating how TDD works-
1. Run a test and see if it fails: Write a unit function for the test that will be implemented. The test shouldn’t be too long and should be enough to focus on only one behavior of the function. Write minimal code that meets the requirements. It’s now time to run the test and check if it fails. A test that shows a negative result means you’re on the correct track, and it was no beginner’s luck. Failure here is good.
2. Write the correct code that delivers a positive result: Write the bare minimum supporting code that is correct enough to pass the test. If the code makes the cut, move on. Do the test again and confirm if it passes.
3. Refactor till needed: After passing the test, start refactoring without splitting the code. Evaluate the code and look for areas of improvement to ensure the code is clean. Eliminate duplicate code by adding new features. Strengthen the design system to power up solutions. Once finished with refactoring and run the tests again so that you pass. Repeat until no longer required.
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Register Today!While there are many benefits of TDD, there are certain disadvantages as well that you should know.
1. Speed: The main drawback of TDD is the speed with which the development progresses. While TDD is the best option when it comes to developing a quality product, it definitely slows down the development speed till it becomes the culture and mindset of the team.
2. Maintenance Test: Maintaining test code is, by default, necessary in TDD. When the product requirements evolve, functionality tests need to be revised and followed up with changes in the implementation code. There are ample opportunities to eliminate unnecessary tests based on the nature of the system.
3. Steep Learning Curve: TDD isn’t as simple as it seems. It has a steep learning curve and requires utmost dedication and practice as it is different from conventional systems. While it does take up a major chunk of your time, in the longer run, you will benefit from it. Making rigorous tests easy is an uphill task and can only be done with experience.
4. Dedicated Time: TDD works only if the entire team believes in it. Mixed beliefs about TDD will result in failure, and it's best not to adopt it if that’s the case. Unit testing must be done diligently or else TDD will only fail without a trace.
Organizations have immensely benefited from the use of TDD. The benefits and disadvantages should be equally considered before arriving at a decision. Since it’s an agile way of approach, it will definitely succeed if done right. If you need help with TDD in your organization, we are just a message away.
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For a detailed enquiry, please write to us at connect@agilemania.com