Behaviour-Focused Testing

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A testing approach that prioritises understanding how the system behaves from a user's perspective, as distinct from verifying the correctness of its internal implementation. Behaviour-focused testing asks questions like "what is the worst thing that could happen for this user?" and "what would this person expect the system to do?" rather than "does this module function as coded?". 

It is especially valuable when working with systems that have complex roles and permissions, where implementation details can obscure the actual user experience. The approach overlaps with BDD but does not require formal Given-When-Then syntax or automation to be effective.
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