What is Unit Testing?

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Hi..
What is Unit Testing and why to use it?What benefit it would cause if I use it in my live projects?

Please help!!!!

Posted 17-Jun-15 23:43pm

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Duncan Edwards Jones · Accepted Answer · 2015-06-17T23:54:00

Unit testing is testing the smallest components (units) that make up your program as units. These tested units give you increased confidence of the solution they are part of - and because unit testing frameworks can be automated these tests build up over time to give the developer confidence that the changes they have made have not introduced new defects.

There are a number of frameworks designed to help make unit testing easier - for example NUnit, MSUnit etc.

In addition to the confidence of using tested components, the fact of having to unit test code tends to make you write code that is, in turn, more testable - which is also code that is more maintainable.