The art of unit testing explained

[ Thanks to Linux User & Developer magazine for this link. ]

"The verification process confirms that the software meets its technical specifications. A specification is a description of a function in terms of a measurable output value given a specific input value under specific preconditions.

"The validation process confirms that the software meets the business requirements. A defect is a variance between the expected and actual result. The defect's ultimate source may be traced to a fault introduced in the specification, design, or development (coding) phases.

"Software testing answers questions that development testing and code reviews can't."

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