1️⃣Unit Testing

Unit testing ensures that each part of the code developed in a component delivers the desired output. Whenever the application is ready and given to the Test engineer, he/she will start checking every component of the module or module of the application independently or one by one, and this process is known as Unit testing or Component testing.

Unit Testing Techniques

Unit testing uses all white box techniques as it uses the code of the software.

How to achieve the best result via Unit testing?

Unit testing can give best results without getting confused and increase complexity by following the steps listed below:

• Test cases must be independent because if there is any change or enhancement in requirement, the test cases will not be affected.

• Naming conventions for unit test cases must be clear and consistent.

• During unit testing, the identified bugs must be fixed before jump on next phase of the SDLC.

• Only one code should be tested at one time.

• Adopt test cases with the writing of the code, if not doing so, the number of execution paths will be increased.

• If there are changes in the code of any module, ensure the corresponding unit test is available or not for that module.

Advantages

• Unit testing uses module approach due to that any part can be tested without waiting for completion of another parts testing.

• The developing team focuses on the provided functionality of the unit and how functionality should look in unit test suits to understand the unit API.

• Unit testing allows the developer to refactor code after a number of days and ensure the module still working without any defect.

Disadvantages

• It cannot identify integration or broad level error as it works on units of the code.

• In the unit testing, evaluation of all execution paths is not possible, so unit testing is not able to catch each and every error in a program.

• It is best suitable for conjunction with other testing activities.