Abstract
A testing-based approach for constructing and refining very high-level software functionality representations such as intentions, natural language assertions, and formal specifications is presented and applied to a standard line-editing problem as an illustration. The approach involves the use of specification-based (black-box) test-case generation strategies, high-level specification formalisms, redundant or parallel development and cross-validation, and a logic programming support environment. Test-case reference sets are used as software functionality representations for the purposes of cross-validating two distinct high-level representations, and identifying ambiguities and omissions in those representations. In fact, we propose the use of successive refinements of such test reference sets as the authoritative specification throughout the software development process. Potential benefits of the approach include improvements in user/ designer communication over all life cycle phases, and an increase in the quality of specifications and designs.
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