Scrum is a light framework to manage a product development. It does not govern the technical aspect of the project. If you want to build a robust product, then you will have to look at software development best practices, and the best resource for that is The Extreme Programming (XP) camp. Whenever I am coaching any team, I will always get my team using Extreme Programming (XP) techniques. In this post, I will cover three most popular techniques that I think are must for every software development team.
Test Driven Development (TDD)
Test Driven Development (TDD) focuses on the test first and keeping the code simple. In most organisations, due to the pressure on the developers, testing is neglected, and with Test driven development, testing is taken into consideration from the beginning. In TTD your tests are written before writing the code. Here are step five steps of Test Driven Development (TDD)
1. Add Test
2, Run the Test and see if the new test Fails
3. Write the code
4. Run tests
5. Refactor code
Some of the major benefits of the TDD are:
- applications are written for testability
- ensures that tests are written for every feature
- forces continual focus on software quality
- forces continual focus on software quality
- Safer Refactoring
- overall fewer bugs found in the code and reduced time of fixing code problems
Continuous Integration (CI)
Continous Integration (CI) has become a fundamental process to the success of the project and for the project to be delivered on time. Continuous Integration (CI) aims to reduce the pain of the integration by a making smaller set of code bases integration on a regular basis. Continous Integration (CI) means that Developers commit the code to the repository on a regular basis. At least once daily. CI server would use the code and run automated tests. It would highlight any issue straight away. If the Dev integrate his/her code on a daily basis, he/she can discover problems in the code straight away and fix them, which less painful than him trying to fix the code integration issue after two months of his coding. Issues discovered in a daily integration would not take more than 10 mins to resolve whereas in olden days we would allocate months for integration testing.
Pair programming
Pair programming is a concept introduced by the XP camp. Pair programming is where two engineers work together on one machine. One is the driver (writing the code), and the other is Observer.
Pair programming is very controversial and very difficult to sell to the management as they see this as a reduction in productivity and increase the manpower required to deliver any piece of work. What they don’t realise is that the quality of the code written is very high standard and the company is saving money because Devs are not going back that often to fix bugs.
One thing to note about pair programming is that in the beginning if you force this on the team you will get lots of kick back. No one likes another person looking over your shoulder all the time. It gives a big brother effect in the beginning. Slowly introduces the idea to your team. Whenever you have a very complex piece of work, then ask two engineers to work together. Over time increase the frequency of pair programming opportunity and request till it becomes a culture within your team.
Whenever I talk to any engineer who is used to pair programming, he/she would not like to go back to old way working (working by themselves), but all of them also tell me how worried and scared they were when they start using pair programming.
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