Software engineering’s version of White Box Testing, known as Basis Path Testing, defines test cases based on logical or flow channels that may be followed within the program. The goal of basis path testing is to specify the number of independent paths so that the necessary test cases can be specified explicitly to ensure the greatest possible test coverage.

Basis path testing in software engineering entails running every conceivable block of a program, achieving maximal path coverage with the fewest feasible test cases. It combines branch testing and path testing techniques.

Steps for Basis Path testing

The fundamental procedures for base path testing are as follows:

• Create a control graph (to identify different program paths)

• Find a basis set of paths
• Determine the cyclomatic complexity (metrics to determine the number of independent paths)
• Find a basis set of paths
• Generate test cases to exercise each path

Advantages of Basis Path Testing

Basis Path Testing is useful in the following situations −

·Additional Coverage− Basis path testing provides the finest code coverage because it emphasizes maximum logic coverage rather than maximal path coverage.

· As a result, the code has been thoroughly tested.

·Testing for Maintenance− When a piece of software is modified, it’s still required to test the changes made, which necessitates path testing.

The first step a developer does after writing code is to test the module’s or program’s structure. Base path testing, therefore, demands a deep comprehension of the organization of the code.

·Testing for Integration− When one module calls another, a considerable chance of interface issues exists. To prevent such issues, all of the pathways on the module interfaces are tested using path testing.

·Testing effort− since the basis path testing technique computes the cyclomatic complexity of software (i.e., a program or module), it is clear to see that the testing effort in basis path testing is directly correlated with the complexity of the software or program.

All potential independent paths that the program or piece of software could take to get to its destination or conclusions are tested using the basis path method. For running various base routes, several test cases are created. In addition to carrying out all logical checks, Basis Path testing is a pure white box test. Before deploying the test cases, we must first compute the cyclomatic complexity to discover the basis paths. The following tools can be used to calculate basis path testing: GMetrics, DevMetrics, NDepends, and OCLint.

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