⬛Black Box Testing

The term 'black box' is used because of the external perspective of the system.

The black box name denotes that the internal logic and workings are hidden like a "black box", and testers can only see the inputs and outputs.

Testers do Black Box Testing

In this, the testers will test the application as a "black box" based on the specified requirements and expected behavior. Testers perform the black-box testing without seeing the internal code or logic.

The developers write the code, compile the application and give it to the testers. The testers then:

• Develop test cases based on the requirements and expected functionality

• Execute the test cases and verify the application's behavior

• Identify any bugs or issues and report them to the developers

The developers fix the bugs and give the updated application back to the testers for retesting.

Advantages of Black Box testing

• Easy to learn for testers as they do not require programming knowledge.

• Independent of the programming languages and technologies used.

• Early identification of gaps between expected and actual results.

Disadvantages

• Cannot identify errors in program logic or internal processes.

• Difficult to generate test cases for complex scenarios.

• Not suitable for testing non-functional requirements.

Which test cases are written first: Black Box or White Box?

The test cases for black box testing are written first because black box testing focuses on testing the software as a whole based on the requirements and the expected behavior of the software.

The test bases for black box test cases are the user requirements and the Software Requirements Specification (SRS). The purpose of black box testing is to ensure that the software meets the user's requirements and functions as expected. Once the black box test cases have been written and executed, the focus shifts to white box testing. White box testing, on the other hand, focuses on testing the code directly to ensure that it is functioning correctly. The test basis for white box test cases is the detailed design and component specifications. Therefore, black box test cases are written first, followed by white box test cases.