Validating xp key
When applied to required changes, a refined set of examples is effectively a specification and a business-oriented test for acceptance of software functionality.After the change is implemented, specification with examples becomes a document explaining existing functionality.
Human brains are generally not that great at understanding abstractions or novel ideas/concepts when first exposed to them, but they’re really good at deriving abstractions or concepts if given enough concrete examples.Specification by example (SBE) is a collaborative approach to defining requirements and business-oriented functional tests for software products based on capturing and illustrating requirements using realistic examples instead of abstract statements.It is applied in the context of agile software development methods, in particular behavior-driven development.In practice, this requires tests based on examples to be automated.A common approach is to automate the tests but keep examples in a form readable and accessible to non-technical and technical team members, keeping the examples as a single source of truth.Specification by example applies to projects with sufficient organisational and domain complexity to cause problems in understanding or communicating requirements from a business domain perspective.
It does not apply to purely technical problems or where the key complexity is not in understanding or communicating knowledge.
The automation layer connects the example to a software system under test.
Note: 2008 and older issues are only available as files.
The earliest documented usage of realistic examples as a single source of truth, requirements and automated tests, on software projects is the Wy Cash project, described by Ward Cunningham in the paper A Pattern Language of Competitive Development in 1989.
Successful application of Specification by example on large scale projects requires frequent validation of software functionality against a large set of examples (tests).
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