Question

If you could select only three test case design methods to apply during unit testing, what would they be and why? Try to support your answer with apt example/ scenarios

Answer 1

Answer)

If one has to select the three test case design methods for applying the unit testing then it would be as follows:

1. It has Structure-Based techniques

2. It has Specification Based techniques

3. It has Experience Based techniques

Considering the specification based technique it helps in leveraging the external description of the software, for example, the technical specification, the design, or the requirement of the test cases. This technique would make the testers create the test cases for providing the full coverage of the test. This is further categorized as

Boundary value analysis, decision table testing, equivalence partitioning, state transition diagram, use case testing.

Considering the structure-based testing which is otherwise called as the white box testing helps in creating the internal structure of the software wherein the technique would test the developed code. Here the developers would have complete information on the software codes which has the internal structure and also the design which can help in test case creation.

The categories are statement testing and coverage, condition testing, design testing coverage, all path testing, multiple condition testing.

Finally, when considering experience-based testing, it provides the highly dependent tester's experience for understanding the most important area for a software where the outcomes would be with regards to the skills, knowledge, as well as expertise.

The categories are Exploratory testing and Error guessing

As per the question, as the user is looking for a unit testing hence they can follow the statement coverage and testing where the test is done at least once for the executable codes as per the requirements. They can also use the use case testing where the software is tested by the user and helps in executing different business scenarios as well as the functionalities.

They can also follow the boundary value analysis which is meant for exploring the errors at the boundary value for an input domain which interrupts with that of the programming. This can find the error which is blocking the functioning of the system.

Example:

The maximum value allowed for a single transaction is 20000, so one can use the value 20001 or 20002 to check the system functioning.

When statement coverage would be used then the developed code is made to be checked in the UAT or the DEV platform at least once before they are pushed to production.

Use case testing is used where there different functionality of the code are being checked and tested.