Chapter 11. Functional Testing: Correctness and Acceptance

Testing is vitally important to confirm that the delivery of software provides value to the business, is easy to maintain, and performs within specified constraints. In this chapter, you will learn about functional testing, which is focused on asserting that the system provides the specified functionality, both from the business perspective and the technical perspective.

Why Test Software?

Why should you test software? The answer that first jumps to mind is to ensure that you are delivering the functionality required, but the complete answer is more complex. You obviously need to ensure that software that you are creating is functionality capable of doing what was intended—delivering business value—but you also need to test for the presence of bugs, to ensure that the system is reliable and scalable, and in some cases cost-effective.

Traditionally, validating the quality of a software system has been divided into testing functional requirements and testing nonfunctional requirements—also referred to as cross-functional or system quality attributes. Before exploring the process of testing functional requirements within a CD pipeline, you first need to understand the various types and perspectives of testing.

What to Test? Introducing Agile Testing Quadrants

It is important that you are clear about the types of testing that must be performed on a system that you are building, and you also need to understand how much of ...

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