How are test cases created?

There are two methods for creating test cases:

Black box testing

The testers consider the software as a black box with inputs and outputs in this specification-based testing method. In “black box” testing, the testers are unaware of the internal workings of the software; instead, they are only aware of the functions it performs. This kind of testing methodology is acceptable for all testing levels when the specification is present.

White box testing

White box testing assesses the logic and internal organization of the code. The testers must possess coding skills in order to implement white box testing so that they can work with internal code. They investigate the code and identify the problematic unit.