Unit Testing
The simplest test to execute and understand is a unit test; unit tests determine whether each functional unit within the system is working properly. Unit tests examine a wide variety of system components and functions, including authentication, system logging, a Web server, or reboot recovery. The system passes the test when each functional unit works according to its original specifications.
Programmers Use Unit Tests, Too
 | Professional programmers use unit tests to test each functional unit of a program (rather than a system) before testing the program as a whole. Individual unit testing significantly reduces the number of places administrators ... |
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