PHIGS Validation Tests (Version 1.0): Design Issues | NIST

Conformance testing for the Programmer's Hierarchical Interactive Graphics System (PHIGS) standard presents certain novel difficulties, especially the indirect effect of many functions, and the inaccessibility to the program of visual effects. The model of logical inference offers a way to organize a system of the complexity needed to overcome these problems. This complexity makes the use of certain database concepts quite valuable in allowing users to comprehend the system. Special emphasis is placed on allowing the user to associate each test case with some specific requirement in the standard. Test output consists of a set of formatted messages that enable the user to assess test results rapidly and accurately.