I have questions about use case and test case . In my understanding both are the same things, just a UML diagram, but in college my teacher said that a test case is not a diagram and not a use case in> but did not go into detail, however, some people said that the test case is a use case ie a UML diagram. Now I am confused about these two concepts. The following example of a use case can be considered a test case ?
If not, what would be a test case ?