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Concept
Agile testing
Résumé
Agile testing is a software testing practice that follows the principles of agile software development. Agile testing involves all members of a cross-functional agile team, with special expertise contributed by testers, to ensure delivering the business value desired by the customer at frequent intervals, working at a sustainable pace. Specification by example is used to capture examples of desired and undesired behavior and guide coding.
Agile development recognizes that testing is not a separate phase, but an integral part of software development, along with coding. Agile teams use a "whole-team" approach to "baking quality in" to the software product. Testers on agile teams lend their expertise in eliciting examples of desired behavior from customers, collaborating with the development team to turn those into executable specifications that guide coding. Testing and coding are done incrementally and interactively, building up each feature until it provides enough value to release to production. Agile testing covers all types of testing. The Agile Testing Quadrants provide a helpful taxonomy to help teams identify and plan the testing needed.
The model of the Agile Testing Quadrants was originally described by Brian Marick, and was popularized by Lisa Crispin and Janet Gregory in their book Agile Testing: A Practical Guide for Testers and Agile Teams. It places different test types on two axis: Technology Facing vs Business Facing, and Support Programming vs Critique Product.
Traditional testing methodologies (often employed in the Waterfall model of software development) usually involve a two-team, two-phase process in which the development team builds the product to as near perfection as possible. The software product is delivered late in the software development life cycle at which point the test team strives to find as many bugs/errors as possible. In contrast with these traditional methodologies, Agile testing focuses on repairing faults immediately, rather than waiting for the end of the project.
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