Topic: Unit Testing

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   Unit Testing

In computer programming, unit testing is a procedure used to validate
that individual units of source code are working properly. A unit is
the smallest testable part of an application. In procedural programming
a unit may be an individual program, function, procedure etc, while in
object-oriented programming, the smallest unit is always a Class; which
may be a base/super class, abstract class or derived/child class. Units
are distinguished from modules in that modules are typically made up of
units.

Ideally, each test case is independent from the others; mock objects
and test harnesses can be used to assist testing a module in isolation.
Unit testing is typically done by the developers and not by end-users. 

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															The goal of unit testing is to isolate each part of the program and show that the
															individual parts are correct. A unit test provides a strict, written contract
															that the piece of code must satisfy. As a result, it affords several benefits.


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