what is graph, software testing

What is graph?

A graph is a set of nodes and that set must not be empty. The graph contains the following important components.

Start node:  A set of initial nodes and that set must not be empty.

Final node: A set of final nodes and that set must not be empty.

Edges: A set of edges. Edge is a link of one node with another node.

graph software testing
Figure 1: graph

Path : A path is a sequence of nodes.

Edge: Each pair of nodes is an edge

Length: The number of edges represents the length of the graph. Note that only one single node is a path of length 0

Subpath: A smaller subset path of a big superset path is subpath.

Reach: A reach is a subgraph that can be reached from nodes.

reach of a graph in software testing
Figure 2: Reach of a graph

Example of Paths:

Following are some of the paths in the above-mentioned diagram.

[ 0, 3, 7 ], [ 1, 4, 8, 5, 1 ], [ 2, 6, 9 ]

Similarly, there are also some more possible paths in figure 2.

Example of Reach:

Following are some of the reach in the above-mentioned Figure 2.

Reach (0) = { 0, 3, 4, 7, 8, 5, 1, 9 }

This means that if we starts from node 0 then we can reach 3, we can reach,4 and similarly we can reach 7,8,5,1,9

 

Reach([2,6]) = {2, 6, 9}

This means that if we starts from node 0 and then after 0 if we read 6,  then we can reach 9 only.

 

Fazal Rehman Shamil
Welcome to all friends. The reason for our success is only your love for T4Tutorials. Our team is always available to answer your queries regarding any kind of confusions or discussion regarding your study and career matters. For discussion with us please join our facebook group "T4Tutorials.com". The link of the group is mentioned below. Thanks and love to all for connecting with us. We are nothing without you. Love you all.....
https://web.facebook.com/groups/2066136233601097/

Leave a Reply