- Reduced bugs:
Tests do not exclude bugs but reduce it to a great extent in new features of the program. Test also reduces bugs in existing features. When codes are tested well, adding new features hardly breaks the code functionality. But in case of not writing tests, we may introduce bugs which may be undetectable for several days.
- Improved designs:
If you write tests, your code must be testable. This makes design well decoupled because when we write tests, we tend to separate out the parts as much as possible. Well, separated codes give you a better design which is easy to use.
- Reduced cost of changes:
The earlier the bugs are found, the easier it is to fix. When detected later, it is very hard to determine which change caused the bug. Tests give you an easy way to change the software without fearing of breaking the existing code functionality. This gives you confidence to discover or check new design ideas.
- Good Documentation:
Usually, developers are too lazy to document their work. However, tests carry a lot of necessary information on the design of the code and how it is going to work. This gives the much-needed documentations to fellow developers.
- Plan before you code:
As you introduce a new feature or refactor an existing one, testing makes you slow down and think about what effect the code is going to have. While writing tests, you are more careful about using the public API and the final result. This not only keeps you focused but gives better code quality.
Testing is more competent with alteration and modification of code throughout the lifetime of application. Test permits you to refactor at any time that ultimately results in a clear and less complicated design that does what it is exactly supposed to do.
- Rapid feedback:
By writing tests, you are provided with feedback rapidly in case of a mistake. It immediately lets you know if the change in code is suitable or not. Thus a faster feedback loop enhances the productivity of the application.
- Avoids manual testing:
If codes are tested after making changes, it takes a lot more time. Not only that, it is susceptible to human error. Test-first minimizes the chances of error.
- Faster development:
Writing tests force you to slow down and think about the outcome. But in the long run, it provides you better speed during development. Because you are not constantly bothered about breaking the existing codes. It eliminates the time wastage for checking and fixing the bugs in the code.
Therefore, from the above points, it is completely evident that this is the right times to banish all the myths and start practicing writing tests for more fluent software development.