Unit Testing has been around for a long time and always it is a good idea for doing testing. The key is not just to write number of test cases but to perform the test case as well. If the test case is just written and throw then it does not give a guarantee that nothing will change in future that harms your full code. So, instead of writing test cases, perform tests to get surety of that nothing will change until you don't allow any changes in the code. This is the thing where unit testing will hit its peak usefulness.

Unit tests are a good way for developers and QA (Quality Assurance) engineers to ascertain that whether independent unit of code are working as expected by the client or not. A unit testing is an automation technique means it runs by itself without any human intervention and if all the test cases are performed successfully then it will produce minimum output after the completion.

The developers write codes at the same time as they get the code from the client to perform testing in it. They generally uses a short cycle of code/write test/run test/repeat that helps them to focus easily on the actual problem and reduce the time of backtracking efforts. The tests that are developed at the initial stage of writing the code can serve after the completion of the whole code also to ensure the client that functionality of the code is still working same as initially.

When you write test case at the same time of writing the code you can easily maintain your focus on your task itself. It helps you by improving the quality of the code you are writing because at that time you have fresh ideas in your mind. Unit testing helps helps you to write code faster because of the less time it takes in doing backtracking.

Unit test does not give any output unless it get fails and then it prints something useful on the screen but in short. Unit testing displays output that manually needed to be tested for clues otherwise it never fill the screen with the long outputs. The developers then use unit testing tools to reexamine the code.

Well there is a huge barrier that makes the difference in the unit testing advantages because setting up realistic test cases can be a quite tough task. The developers are sure about the how the application works from the outside and how it will fulfill the need of the client but they aren't sure how the application work "under the hood".

In unit testing we have to write the test case at the same time of writing the code so that it goes hand-in-hand with the client's need but if these initial conditions aren't set correctly at that time only then they will not exactly work as we have thought later and at that time they aren't be useful for you.

Therefore, it is very essential to create the initial conditions correctly and the developers who try to complete their work using this approach may get their desired results and who don't get disappointed results from the unit testing.

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Article Submitted By: garrydenilson
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