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One of the expected TestMaterialsQualities is completeness, that is how much of the specification is covered by a test suite. This is usually refered as coverage.

Coverage can be measured with regard to different types of reference:

  • test assertions when available
  • conformance requirements
  • "features" defined by the specification (with the difficulty of defining what a feature really is)
  • in the case of test driven development approach for the spec (as described in TestDevelopmentMethodologies), the issues list can be used as the referent

In the case of a conformance test suite, it is crucial to be able to assess how much of specification is covered, so that it's possible to give a degree of confidence in the conformance of the tested product (see "Provide coverage information" in June TestGL Editors Draft).


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