[ToC]

 

Glenford J. Myers, The Art of Software Testing, John Wiley & Sons, 1979

COMPLETE CAUSE-EFFECT GRAPH OF THE DISPLAY COMMAND

[Figure at right] contains the complete graph with the constraint conditions. Notice that at most one of the causes 5, 6, 7, and 8 can be present. All other cause constraints are the requires condition. Notice that cause 17 (multiple output lines) requires the not of cause 8 (second operand is omitted); cause 17 can only be present when cause 8 is absent. Again, the reader should explore the constraint conditions carefully.