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11.2 Path Tracing Issues in Graphs and Matrix Representation

Graphs are useful in representing software structure in an abstract form. After we arrive at a graphical representation of a software structure, we try to trace paths. This exercise of tracing paths involves: identifying a set of paths; identifying predicates in each path; choosing set of input values that would trigger coverage of those paths; and verifying whether these paths are achievable or not. In brief, effective test designing revolves around identifying and tracing paths in the graph.

However, identifying and tracing patha is not an easy task. If we try to do it directly with the help of a graph representation, the entire exercise demands very high level of intuition; is often confusing; and also, error prone. In order to increase reliability of path tracing and also, in order to reduce possible errors, matrix representation of a graphical representation of a software structure can be used.
 
 
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