Writing Unit Tests

Question

Good day.

I'm just starting to understand unit testing, and I have a question about creating unit tests.

The question is more on logic, I guess.

I will have 4 methods:

Loading the matrix from the file into the two-dimensional array GetMatrix(string filename) ;
The method by which the matrix is rotated 90 degrees - void RotateMatrix() ;
Matrix output method on the screen - void ToScreen() ;
Saving matrix to file.

I need to write 2 unit tests in this project.

Question: how best to implement tests? What logic to use? What to check?

Thank!

Well, actually, what you want to implement, then check - that the matrix successfully loaded, that it correctly turns, that saving it to the file is successful.
I just understand how to do a check in load / save methods using try / catch.
@Telsystems, more specifically you should read some unit testing guidelines.
Not that this is a very voluminous topic, but still it is beyond the scope of a single answer, or even less a comment.
In brief: you create a test project with classes for tests, in each specific method of these classes you check with asserts (and / or some kind of your own logic) the suitability of your business logic to the tasks assigned to this logic.

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