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There are documented usages of this approach in domains including investment banking, financial trading, insurance, airline ticket reservation, online gaming and price comparison.) - ensuring that the right product is built.
They do not replace tests that look at a software system from a purely technical perspective (those that evaluate whether a product is built the right way, such as unit tests, component or technical integration tests) or tests that evaluate a product after it was developed (such as security penetration tests).
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.
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).
Any additional information discovered during development or delivery, such as clarification of functional gaps, missing or incomplete requirements or additional tests, is added to this single source of truth.
As there is only one source of truth about the functionality, there is no need for coordination, translation and interpretation of knowledge inside the delivery cycle.
It is applied in the context of agile software development methods, in particular behavior-driven development.The automation layer connects the example to a software system under test.Note: 2008 and older issues are only available as files.On most versions of windows you must first save these files to your local machine, and then unblock the file in order to read it.To unblock a file, right click on it, and select properties, and then select the ‘unblock’ button.