Path Testing is a method that is used to design the test cases. In path testing method, the control flow graph of a program is designed to find a set of linearly independent paths of execution. In this method Cyclomatic Complexity is used to determine the number of linearly independent paths and then test cases are generated for each path.
It give complete branch coverage but achieves that without covering all possible paths of the control flow graph. McCabe’s Cyclomatic Complexity is used in path testing. It is a structural testing method that uses the source code of a program to find every possible executable path.
Path Testing Process:
Control Flow Graph, Cyclomatic Complexity, Make Set, Create Test Cases
Path Testing Techniques:
- Control Flow Graph:
The program is converted into control flow graph by representing the code into nodes and edges. - Decision to Decision path:
The control flow graph can be broken into various Decision to Decision paths and then collapsed into individual nodes. - Independent paths:
Independent path is a path through a Decision to Decision path graph which cannot be reproduced from other paths by other methods.
Advantages of Path Testing:
- Path testing method reduces the redundant tests.
- Path testing focuses on the logic of the programs.
- Path testing is used in test case design.