Path testing

Path testing is widely used to design test cases. Path testing process has 4 steps, which is to draw control flow graph, calculate Cyclomatic Complexity, make set of paths, and then create test cases for the those paths, which would use this formula: E - N + 2P (where E is number of edges, N is number of vertices and P is program factor). Path testing usually use control flow graph, which would help developers find sets of linearly dependent paths of execution. Path testing also use Cyclomatic Complexity to determine the number of linearly independent paths and each path should be a separate test case.

Besides control flow graph, path testing can also use different techniques like decision to decision path, where control flow path can be broken into various decision to decision paths and collapse into individual nodes, and Independent paths. There are various advantages of path testing like making sure that tests are isolated and not redundant to each other, it helps developers focus more on the logic of the programs, and finally, it helps developers to design test cases in a much easier and simpler way.

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