This is most confusing terminology in white box testing :
Decision coverage :
Decision coverage or Branch coverage is a testing method, which aims to ensure that each one of the possible branch from each decision point is executed at least once.
Example
Create the flow chart on the basis of above program
Decision coverage :
Decision coverage or Branch coverage is a testing method, which aims to ensure that each one of the possible branch from each decision point is executed at least once.
Example
Read A Read B IF A+B > 10 THEN Print "A+B is Large" ENDIF If A > 5 THEN Print "A Large" ENDIF
Create the flow chart on the basis of above program
Calculate Branch Coverage:
find out the minimum number of paths which will ensure that all the edges are covered. In this case there is no single path which will ensure coverage of all the edges at once. The aim is to cover all possible true/false decisions.
(1) 1A-2C-3D-E-4G-5H
(2) 1A-2B-E-4F
Hence Decision or Branch Coverage is 2.
Statement Coverage: (take a reference of the same example )
To calculate Statement Coverage, find out the shortest number of paths following
which all the nodes will be covered.
Here by traversing through path 1A-2C-3D-E-4G-5H all the nodes are covered. So by traveling through only one path all the nodes are covered.
so the Statement coverage is 1
Statement Coverage: (take a reference of the same example )
To calculate Statement Coverage, find out the shortest number of paths following
which all the nodes will be covered.
Here by traversing through path 1A-2C-3D-E-4G-5H all the nodes are covered. So by traveling through only one path all the nodes are covered.
so the Statement coverage is 1
