So to start with, most important Concept, that is misunderstood as an unnecessary task by most of the developers – Unit Testing!!! First, let us understand why it is very necessary for a developer to write unit test cases? Deployment: The most basic reason why test cases are written is, when we work in a team, many developers are contributing to the code base, and sometimes even on same modules. In such scenarios, if any developer checks-in a piece of code that breaks the functionality of certain module, unit test cases is the first line of call which alerts us about