Hi Alexey, in context driven testing, black box is defined as:

“Testing and test design without knowledge of the code (or without use of knowledge of code).”

Glass box:

“Testing and test design using knowledge of the details of the internals of the program (code and data).”

Black box tester asks questions: “Does this program do what the users (human and software) expect?”

Glass box tester asks questions: “Does this code do what the programmer expects or intends?”

Regards, Karlo.

https://blog.tentamen.eu